نتایج جستجو

2558

نتیجه یافت شد

مرتبط ترین ها

اعمال فیلتر

به روزترین ها

اعمال فیلتر

پربازدید ترین ها

اعمال فیلتر

پر دانلودترین‌ها

اعمال فیلتر

پر استنادترین‌ها

اعمال فیلتر

تعداد صفحات

27

انتقال به صفحه

Archive

Year

Issue

Issues

Scientific Information Database (SID) - Trusted Source for Research and Academic Resources
Scientific Information Database (SID) - Trusted Source for Research and Academic Resources
Scientific Information Database (SID) - Trusted Source for Research and Academic Resources
Scientific Information Database (SID) - Trusted Source for Research and Academic Resources
Scientific Information Database (SID) - Trusted Source for Research and Academic Resources
Scientific Information Database (SID) - Trusted Source for Research and Academic Resources
Scientific Information Database (SID) - Trusted Source for Research and Academic Resources
Scientific Information Database (SID) - Trusted Source for Research and Academic Resources
Issue Info: 
  • Year: 

    2008
  • Volume: 

    0
Measures: 
  • Views: 

    129
  • Downloads: 

    0
Abstract: 

CEROPLASTES RUSCI (L.) (HEMIPTERA, COCCIDAE) IS A POLYPHAGOUS PEST THAT IS DISTRIBUTED THROUGHOUT MANY REGIONS OF THE WORLD. THE PEST POPULATION HAS INCREASED ON FIG TREES (FICUS CARICA L.) IN ESTAHBAN REGION OF FARS PROVINCE. DURING 2007 SURVEY IN THIS REGION, ACTIVITY OF A COMPLEX OF THE FOLLOWING NATURAL ENEMIES ON C. RUSCI WAS OBSERVED:PARASITOIDS:HYMENOPTERA, EULOPHIDAE:1-APROSTOCETUS TODDALIAE (RISBEC, 1958)PREDATORS:DIPTERA, PHORIDAE:2-MEGASELIA SCALARIS (LOEW, 1866)*COLEOPTERA, CYBOCEPHALIDAE:3-CYBOCEPHALUS NEAR POLITUS GYLLENHAL 1813*COLEOPTERA, COCCINELLIDAE:4-HYPERASPIS POLITA WEISE, 1885*5-MENOCHILUS SEXMACULATUS (FABRICIUS, 1782)*MEGASELIA SCALARIS AND CYBOCEPHALUS NEAR POLITUS ARE NEW RECORDS FOR IRANIAN FAUNA. EXCEPT APROSTOCETUS TODDALIAE OTHER SPECIES ARE NEW RECORDS ON THIS PEST IN IRAN.

Yearly Impact:   مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

View 129

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic ResourcesDownload 0
Issue Info: 
  • Year: 

    2008
  • Volume: 

    0
Measures: 
  • Views: 

    185
  • Downloads: 

    75
Abstract: 

IN THIS STUDY A STATIC COMPUTABLE GENERAL EQUILIBRIUM MODEL BASED ON IRANIAN SOCIAL ACCOUNTING MATRIX OF 1380 WAS APPLIED TO INVESTIGATE THE IMPACT OF 20 AND 50 PERCENT INCREASE IN GOVERNMENT EXPENDITURE UNDER FLOATING EXCHANGE RATE REGIMES ON POVERTY INDICES. THE IMPACT OF INCREASED GOVERNMENT EXPENDITURE ON POVERTY INDICES WAS PERFORMED BY ANALYZING ITS IMPACT ON HOUSEHOLD’S CONSUMPTION AND PRICES. THE RESULTS REVEALED THAT BASED ON THE CONSUMPTION CHANGES, INCREASED GOVERNMENT EXPENDITURE INCREASES POVERTY THROUGHOUT URBAN HOUSEHOLDS, WHILE REGARDING THE PRICE CHANGES, INCREMENTS OF GOVERNMENT EXPENDITURE WILL REDUCE POVERTY INDICES. IN THE CASE OF RURAL HOUSEHOLDS, BASED ON BOTH OF CONSUMPTION AND PRICE CHANGES APPROACHES, INCREASE IN GOVERNMENT EXPENDITURES RESULT IN REDUCED POVERTY INDICES. HOWEVER, GENERALLY SPEAKING, REGARDING THE LEVEL OF EXPENDITURE INCREMENT, CHANGES IN POVERTY INDICES ARE NOT CONSIDERABLE.

Yearly Impact:   مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

View 185

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic ResourcesDownload 75
Writer: 

RASEKH ERFANEH

Issue Info: 
  • Year: 

    2008
  • Volume: 

    0
Measures: 
  • Views: 

    137
  • Downloads: 

    0
Abstract: 

ACCORDING TO THE IMPORTANCE OF AGRICULTURE SECTOR IN ECONOMIC OF THE COUNTRY, EXISTENCE OF AN EFFICIENT MARKETING SYSTEM AS AN EFFECTIVE TOOL IN DEVELOPMENT OF PRODUCTION GROWTH IS IMPORTANT.SO, INVESTIGATION OF AGRICULTURAL PRODUCTS MARKETING, SPECIALLY GARDEN PRODUCTS AND FRUITS ARE SO IMPORTANT. AMONG GARDEN PRODUCTS, CITURUS, AND AMONG THEM, ORANGE HAS THE MOST VOLUME OF PRODUCTION. IN THIS SECTOR OF AGRICULTURE, PRODUCERS SHARE OF CONSUMER MARGIN PRICE IS LOW AND ITS MARKETING IS INEFFICIENT.IN THIS STUDY, THE AMOUNTS OF MARKETING MARGIN MARKETING FACTORS PROFIT, MARKETING FACTORS SHARE IN MARKETING MARGIN, MARKETING COST COEFFICIENTS AND MARKETING EFFICIENCY ARE CALCULATED.THE NECESSARY DATA FOR THIS STUDY ARE GATHERED IN TWO WAYS: 1- THEY ARE DOCUMENTED FROM STATISTIC SOURCES AND 2- BY RANDOM SAMPLING FROM JAHROM AND SUBURB.35 GARDENERS AND 20 FACTORS OF MARKETING DURING 1385-1386 WERE SELECTED. NECESSARY DATA WERE GATHERED BY INTERVIEWING THE GARDENERS. THE RESULTS SHOW THAT THE SHARE OF MEDIA IN PRODUCTS PURCHASING, MARKETING COST COEFFICIENTS, WHOLESALE NET PROFIT AND THE SHARE OF PRODUCER MARKETING COST OF RECEIVED PRICE ARE HIGH. ALSO, THE ROLE OF WHOLESALES IN INEFFICIENCY OF THIS PRODUCT IS HIGH.ACCORDING TO THE RESULTS, ORANGE MARKETING MUST BE CHANGED AND GARDENERS CORPORATION, ESTABLISH OF MARKETING CENTERS AND DEVELOPMENT OF PROCESSING INDUSTRIES SEEM NECESSARY.

Yearly Impact:   مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

View 137

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic ResourcesDownload 0
Issue Info: 
  • Year: 

    2008
  • Volume: 

    0
Measures: 
  • Views: 

    104
  • Downloads: 

    0
Abstract: 

WITH RESPECT TO INCREASING THE IMPORTANCE OF MARKETING OF AGRICULTURAL PRODUCTS, THE ROLE OF RURAL COOPERATIVES IN KHUZESTAN PROVINCE IN THIS REGARD WAS STUDIED. DATA WERE COLLECTED FROM A SAMPLE OF MEMBER COOPERATIVES AND 480 MEMBERS OF RURAL COOPERATIVES WERE INTERVIEWED. BASED ON THE RESULTS AMOUNTS OF SUPPLIED PRODUCTS TO MARKET FOR EACH MEMBER WERE LESS THAN TEN TONES FOR A MAJORITY OF PRODUCERS. MORE THAN 95 PERCENT OF PRODUCERS SUPPLIED ABOUT 95 PERCENT OF THEIR PRODUCTS. PRODUCERS AND CONSUMER PRICES WERE FLUCTUATED. THE WHEAT PRODUCED BY ALMOST ALL OF MEMBERS WAS BOUGHT BY RURAL COOPERATIVES AND FOR OTHER PRODUCTS THESE COOPERATIVES HAD A LIMITED ROLE IN BUYING. SOME OF THE LIMITATIONS OF SELLING WHEAT WERE: LIMITED NUMBER OF BUYING CENTERS, UNSUITABLE WEIGHT FACILITIES AND WAITING FOR DELIVERY OF THEIR PRODUCTS. FOR OTHER PRODUCTS, SALE PROBLEMS WERE: LACK OF APPROPRIATE BUYERS IN HARVESTING TIME, INSTABILITY OF MARKET AND HIGH FLUCTUATION OF PRICES. ABILITY OF COOPERATIVES FOR MARKETING SERVICES OF PRODUCTS WERE LOW. THE RESULTS OF STUDY INDICATED THAT ALTHOUGH EXISTING SITUATION PERMITS EXPANSION OF COOPERATIVES IN MARKETING OF AGRICULTURAL PRODUCTS, BUT LITTLE HAD BEEN DONE IN THIS RESPECT.

Yearly Impact:   مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

View 104

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic ResourcesDownload 0
Issue Info: 
  • Year: 

    2008
  • Volume: 

    0
Measures: 
  • Views: 

    160
  • Downloads: 

    0
Abstract: 

IN ORDER TO CONSIDERATION THE EFFECT OF SOWING DATE ON GERMINATION TREND IN SEEDS OF CUPRESSUS ARIZONICA A COMPLETE RANDOM BLOCKS DESIGN WITH FOUR REPLICATIONS AND 60 VASES IN PER REPLICATION WAS PERFORMED. SOUND SEEDS OF CUPRESSUS ARIZONICA WERE PLANTED IN TWO DIFFERENT DATES INCLUDING 20 NOVEMBER AND 1 FEBRUARY. IN BEGINNING OF GROWTH SEASON, GERMINATION WAS RECORDED IN 5 DAYS INTERVALS. THEN RESULTS OF PARAMETERS INCLUDING: GERMINATION, GERMINATION PERCENT, ENERGY, PEAK VALUE, SPEED AND CAPACITY AND SURVIVAL RATE WERE CALCULATED REGARDING TO AUTUMN AND WINTER SOWING DATES. THE RESULTS SHOWED SIGNIFICANT EFFECT OF SOWING DATE ON GERMINATION CHARACTERISTICS. SUITABLE SOWING DATE FOR SEEDS OF CUPRESSUS ARIZONICA IS AUTUMN. IT IS A GOOD RESULT DUE TO MORE NUMBER WORKERS AND LESSER COSTS.

Yearly Impact:   مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

View 160

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic ResourcesDownload 0
Issue Info: 
  • Year: 

    2008
  • Volume: 

    0
Measures: 
  • Views: 

    156
  • Downloads: 

    0
Abstract: 

DUE TO TOUGH AND IMPERMEABLE PERICARP, TILIA SEEDS HAVE LOW VIGOR GERMINATION. THE AIM OF THIS STUDY WAS TO DETERMINE THE EFFECT OF SOME SCARIFICATION AND LIGHT TREATMENTS ON SEED GERMINATION. IN THIS RESEARCH THE EFFECTIVENESS OF NINE PRE TREATMENTS INCLUDING SULFURIC ACID (H2SO4) WITH TWO CONCENTRATIONS: 15% AND 30%, NITRIC ACID (HNO3) WITH TWO CONCENTRATIONS: 15% AND 30%, HYDROGEN PEROXIDE (H2O2), HOT WATER, AND TWO LIGHT TREATMENTS (LIGHT AND SHADOW) ON TILIA SEEDS WAS INVESTIGATED. AFTER EACH TREATMENT SEED WERE EXPOSURE IN SAND RIVER AND SAWDUST FOR STRATIFICATION. THEN COLD STRATIFICATION UNDER WET SAND WAS PERFORMED FOR SEEDS DURING 6-8 MONTH. SEED WERE REMINDED IN STRATIFY UNTIL EMERGENCE OF RADICLE. AT ONCE EXIST THE RADICLE; SEEDS WERE CULTURED IN BAG PLASTIC VASE IN AIR. IN CONCLUSION RESULTS SHOWED THAT BEST GERMINATION RATE BELONGED TO HYDROGEN PEROXIDE 1% FOR 40 MIN WITH SAND BED AND RESULTED IN SIGNIFICANTLY PERCENT GERMINATION THAN ALL THE OTHER TREATMENTS AND THE SEED THAT WERE CULTURED IN SHADE HAVE HIGHER VIGOR GROWTH.

Yearly Impact:   مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

View 156

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic ResourcesDownload 0
Issue Info: 
  • Year: 

    2008
  • Volume: 

    0
Measures: 
  • Views: 

    90
  • Downloads: 

    0
Abstract: 

THE AIM OF THIS STUDY WAS IDENTIFICATION AND COMPARISON FATTY ACID COMPOSITIONS OF MUSCLE IN COMMON CARP AND GRASS CARP. THE FATTY ACID COMPOSITION OF COMMON CARP AND GRASS CARP WERE FOUND TO BE 32.86 AND 34.06% SATURATED (SFA), 39.43 AND 25.02% MONOUNSATURATED (MUFAS) AND 24.13 AND 37.54% POLYUNSATURATED FATTY ACIDS (PUFAS), RESPECTIVELY. IN BOTH FISH, PALMITIC C16: 0 AND OLEIC C18: 1 N-9 ACIDS WERE THE PRINCIPAL SATURATED AND MONOUNSATURATED FATTY ACIDS, RESPECTIVELY. THE DOMINANT POLY UNSATURATED FATTY ACID (PUFA) WAS DOCOSAHEXAENOIC ACID (C22: 6N-3) IN GRASS CARP AND LINOLEIC ACID (C18: 2N-6) IN COMMON CARP. THE CONTENT OF N3 PUFAS WAS 8.6% FOR COMMON CARP AND 25/3% FOR GRASS CARP. ARACHIDONIC ACID (20: 4N6) CONTENT WAS 2.55% IN GRASS CARP AND 1.33% IN COMMON CARP.

Yearly Impact:   مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

View 90

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic ResourcesDownload 0
Issue Info: 
  • Year: 

    2008
  • Volume: 

    0
Measures: 
  • Views: 

    156
  • Downloads: 

    0
Abstract: 

INVESTIGATION TO IDENTIFY SOFT SCALE INSECTS ON AMYGDALUS SCOPARIA SPACH AND THEIR NATURAL ENEMIES WAS CARRIED OUT IN MIAN-JANGLE OF FASA (FARS PROVINCE-IRAN) DURING 2007. RESULTS SHOWED THAT ONE SPECIES WAS ACTIVE ON A.SCOPARIA NAMED SPHAEROLECANIUM PRUNASTRI (BOYER DE FONSCOLOMBE) (HEMIPTERA, COCCIDAE). THE DAMAGE OF THE PEST HAS INCREASED ON WILD ALMOND TREES IN MIAN-JANGLE OF FASA DURING RECENT YEARS. HIGH REPRODUCTIVE POTENTIAL AND WIDE DISTRIBUTION OF PEST AND CHEMICAL CONTROL PROBLEMS HAVE LED TO A GREATER NEED TO USE NATURAL ENEMIES AS IPM PROGRAMS. THREE PARASITOID WASPS, TWO HYPERPARASITOIDS AND THREE PREDATORS WERE IDENTIFIED ON S. PRUNASTRI AS FOLLOWED:PARASITOIDS:HYMENOPTERA, APHELINIDAE, COCCOPHAGINAE1- COCCOPHAGUS SEMICIRCULARIS (FÖRSTER, 1841)HYMENOPTERA, ENCYRTIDAE, DISCOIDINI2- DISCODES COCCOPHAGUS (RATZEBURG, 1848)3- MICROTERYS DROSICHAPHAGUS XU, 2002HYPERPARASITOIDS:HYMENOPTERA, APHELINIDAE4- MARIETTA PICTA (ANDRE, 1878)HYMENOPTERA, PTEROMALIDAE5- PACHYNEURON MUSCARUM (LINNAEUS, 1758)PREDATORS:COLEOPTERA, COCCINELLIDAE, CHILOCORINAE6- EXOCHOMUS QUADRIPUSTULATUS (LINNAEUS, 1758)7- EXOCHOMUS UNDULATUS WEISE, 18788- CHILOCORUS BIPUSTULATUS (LINNAEUS, 1758)ACCORDING TO THE LITERATURES, DISCODES COCCOPHAGUS (RATZEBURG, 1848) IS NEW RECORD AS GENUS AND SPECIES LEVEL AND MICROTERYS DROSICHAPHAGUS IS NEW SPECIES RECORD FOR IRANIAN FAUNA. THE RELATIONSHIP BETWEEN THESE PARASITOIDS AND THEIR PLANT HOST, A. SCOPARIA, ARE NEWLY REPORTED. FAUNA OF NATURAL ENEMIES ON S. PRUNASTRI IN MIAN-JANGLE WILD ALMOND TREES IS SO RICH AND COULD CONTROL THE PEST.

Yearly Impact:   مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

View 156

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic ResourcesDownload 0
Issue Info: 
  • Year: 

    2008
  • Volume: 

    0
Measures: 
  • Views: 

    116
  • Downloads: 

    0
Abstract: 

THE LARGE SCALE DEGRADATION OF NATURAL GRAZING IN THE EXTENSIVE RANGELAND ECOSYSTEMS OF IRAN CAN BE LARGE ATTRIBUTED TO THE HIGH STOCKING RATES AND GRAZING PRESSURE.THE GRAZING MANAGEMENT IS A VITAL FACTOR TO CONTROL THE INTENSITY OF THE RANGELAND ECOSYSTEMS DEGRADATION.THE OBJECT OF THIS STUDY IS, THE EFFECT OF HEAVY, MODERATE AND LIGHT RATES ON PRODUCTION, CANOPY COVER, LITTER, STONE AND GROVEL AND BARE SOIL IN SEPTIC ZONE OF TRAN (NODUSHAN). FOR THIS RESEARCH USED COMPLETELY RANDOMIZED BLOCK DESIGN. SAMPLING WAS PERFORMANCE WITH USING STRATIFIED- SYSTEMATIC-RANDOM SAMPLING SCHEME. ON EACH PLOTS (2M2) ESTIMATED CANOPY COVER PERCENTAGE OF EACH PLANT SPECIES, DRY MATTER OF PALATABLE SPECIES, LITTER PERCENTAGE, STONE AND GROVEL AND BARE SOIL PERCENTAGE. ANALYSIS OF DATA CARRIED OUT USING SPSS 11.5 STATISTICAL PACKAGES.RESULTS SHOWN THE CANOPY COVER PERCENTAGE OF DOMINANCE SPECIES (ARTEMISIA SIEBERI) AND PRODUCTION WERE SIGNIFICANTLY AFFECTED BY DIFFERENT GRAZING PRESSURE (P<0.05). TOTAL CANOPY COVER PERCENTAGE, LITTER PERCENTAGE, STONE AND GROVEL AND BARE SOIL PERCENTAGE IN HEAVY GRAZING WAS SIGNIFICANTLY DIFFERENT WITH MODERATE AND LIGHT RATES GRAZING (P<0.05). CANOPY COVER PERCENTAGE OF FORBS AND SHRUBS WERE NOT SIGNIFICANTLY AFFECTED BY DIFFERENT GRAZING PRESSURE (P>0.05).

Yearly Impact:   مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

View 116

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic ResourcesDownload 0
Issue Info: 
  • Year: 

    2008
  • Volume: 

    0
Measures: 
  • Views: 

    147
  • Downloads: 

    0
Abstract: 

REGARDING ECONOMICAL IMPORTANCE OF PRODUCING ALL FEMALE TRIPLOID POPULATIONS OF SALMONID FISH IN AQUACULTURE AND CONSEQUENT EFFECTS OF TRIPLOIDY INDUCTION ON SOME MORPHOLOGICAL ALTERATIONS OF SOME CELLS LIKE BLOOD ERYTHROCYTE, IN PRESENT STUDY, ERYTHROCYTE STRUCTURAL ALTERATIONS WERE INVESTIGATED IN ALL FEMALE DIPLOID AND TRIPLOID RAINBOW TROUT IN THE SECOND YEAR OF CULTURE AT 20 MONTHS OF AGE IN WINTER. FINAL RESULTS ON THE 43 TRIPLOID AND 46 DIPLOID FISH BLOOD SMEARS STAINED WITH 10% GIEMSA SHOWED SIGNIFICANT DIFFERENCES (P<0.01) ABOUT 5.18 % ERYTHROCYTE NUCLEI SEGMENTATION AND 0.27 % LINKED ERYTHROCYTES IN ALL FEMALE TRIPLOIDS IN COMPARE TO 0.00 % IN DIPLOID COUNTERPARTS. IT IS HYPOTHESIZED THE PECULIAR ABNORMALITIES ARE THE STAGES OF AN ERYTHROCYTE DIVISION PROCESS TO INCREASE BLOOD HEMATOCRITE AND OXYGEN CARRYING CAPACITY OF RESPIRATORY STRESSED TRIPLOID FISH.

Yearly Impact:   مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

View 147

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic ResourcesDownload 0
Issue Info: 
  • Year: 

    2008
  • Volume: 

    0
Measures: 
  • Views: 

    126
  • Downloads: 

    0
Abstract: 

THE SPECIES RICHNES IN PLAIN AGHGHALA AND GOMISHAN LOCATED AT EASTERN BORDER CASPIAN SEA WERE STUDIED BY SURVEYING AND USING THE WHITTAKER PLOTS IN FOUR PLAIN GHARAGHIR, INCHEH, SOFIKAM AND PRESERVED AREA INCHEHBROON. THE OBJECTIVE OF THIS STUDY WERE TO DETERMINE SPECIES RICHNESS AND EFFECT SOIL AGENTS OVER SPECIES RICHNESS IN THIS SITES. FOR ANALYSIS OF SPECIES RICHNESS, GROUP REGRESSION MODEL WAS USED. RESULTES SHOWED THAT WAS NOT SIGNIFICANT DIFFERENCE BETWEEN SLOP OF GHARAGHIR PLAIN WITH INCHEH, SOFIKAM PLAIN AND PRESERVED AREA BUT WAS SIGNIFICANT DIFFERENCE WITH REGARD TO HEIGHT. ALSO WAS NOT SIGNIFICANT DIFFERENCE FROM RESPECT STATISTICALLY BETWEEN ANY PAIR REGRESSION UNIT INCHEH SOFIKAM, PRESERVED AREA AND COULD TO COMBINE THOSE SPECIES RICHNESS REGRESSION.BETWEEN 2 SOIL VARIANT TO STUDY (EC, PH), AFFECT FACTOR OVER SPECIES RICHNESS AREA FOUND SOIL EC. BETWEEN PLAINS, GHARAGHIR PLAIN HAVE MOST EC RATHERTHAN 3 PLAINS, ALSO HAVE FEW SPECIES RICHNESS. IN GENERAL, WAS DOMINANT COVERING SALINE PLAIN GOMISHAN ANH AGHGHALA HALOCNEMUM STROBILACEUM BUT TO BE FORMED IN SPRING MOST ANNUALS, HOWEVERE ANNUALS PLANTS BECAUSE TO HAVE SHALLOW ROOTS, TO BE DEVELOPED AFTER WINTER AND SPRING PRECIPITATIONS IT MEANS WHEN PERFORMANCE SALT ABLUTION FROM SHALLOW SOIL.

Yearly Impact:   مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

View 126

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic ResourcesDownload 0
Writer: 

AMINI H. | HOODAJI M.

Issue Info: 
  • Year: 

    2008
  • Volume: 

    0
Measures: 
  • Views: 

    202
  • Downloads: 

    0
Abstract: 

THE CONCENTRATIONS OF HEAVY METALS INCLUDING PB, CU, ZN, CD, AND FE IN ROBINIA PSUDO ACACIA.L OF LEAVES AND SOIL SAMPLES WERE COLLECTED FROM DIFFERENT ZONES IN ESFAHAN WERE EVALUATED. WE USED ACACIA TREES IN OTHER TO MONITOR THE INTENSITY OF SOIL AND AIR POLLUTION TO SOME HEAVY METALS (FE, ZN, PB, CU, MN AND CD) IN THE CITY OF ISFAHAN. CONCENTRATION OF THESE HEAVY METALS IN SOILS, WASHED AND UNWASHED LEAVES OF ACACIA, FOR FOUR CITES (KHORASGAN, HASHTEBEHESHT STREET, STEEL MILL AND BAGH BAHADORAN) WERE COLLECTED IN TWO STAGES (JUN AND SEPTEMBER) FOR CHEMICAL ANALYSIS. CHEMICAL NAALYSIS OF SOIL SAMPLES AT DEPTH OF 0-10CM SHOWED THAT CONCENTRATION OF MOST OF THESE ELEMENTS WERE LOWER THAN THE MAXIMUM RECOMMENDED LEVELS. CONCENTRATION OF MEASURED HEAVY METALS IN WASHED LEAVES WERE LOWER THAN THOSE OF UNWASHED LEAVES OF ACACIA AND DIFFERENT WAS SIGNIFICANT. THE STAGES OF LEAF SAMPLING DID NOT SHOW ANY SIGNIFICANT EFFECT ON THE CONCENTRATION OF THE MEASURED HEAVY METALS IN LEAF SAMPLES. THERE WAS NO SIGNIFICANT CORRELATION BETWEEN THE CONCENTRATION OF HEAVY METALS IN WASHED LEAVES IS THE CONCENTRATION OF THESE METALS IN SOIL SAMPLES. RESULTS OF THIS INVESTIGATION SHOWED THAT THE INDUSTRY AND TRAFFIC WERE THE MAIN SOURCE OF AIR HEAVY METAL POLLUTION IN ISFAHAN, AND ACACIA TREE IS A DEPENDABLE BIOMONITOR FOR AIR AND SOIL POLLUTION INVESTIGATIONS.

Yearly Impact:   مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

View 202

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic ResourcesDownload 0
Issue Info: 
  • Year: 

    2008
  • Volume: 

    0
Measures: 
  • Views: 

    102
  • Downloads: 

    0
Abstract: 

THIS PURPOSE OF THIS STUDY IS DETERMINING THE FACTORS AFFECTING TIMELINESS OF MACHINE OPERATION IN DIFFERENT STAGES OF SUGAR BEET PRODUCTION. FARM-LEVEL DATA WERE COLLECTED FROM A SAMPLE OF 227 SUGAR BEET FARMS LOCATED IN THE THREE MAJOR DISTRICTS OF FARS PROVINCE OF IRAN: EGHLEED, MARVDASHT AND FASA WAS SELECTED BY A RANDOM SAMPLING DURING THE YEAR 2006. THE FINDINGS INDICATED THAT THERE WAS A SIGNIFICANT POSITIVE RELATIONSHIP BETWEEN INTENSITY OF DEMAND FOR USING FACILITATES AND MACHINERY SERVICES OF SUGAR BEET FACTORIES IN STUDIED AREA, LOW LIQUIDITY OF SUGAR BEET FARMERS TO MACHINES TENURE, INTENSITY OF CROPPING ACTIVITIES OF COMPETITIVE CROPS OF SUGAR BEET AND ON TIME NON-ACCESSIBILITY OF SUGAR BEET FARMERS TO PRODUCTION INPUTS (SUCH AS, CHEMICAL FERTILIZERS AND POISONS) AND TIMELINESS OF MACHINE OPERATION IN SUGAR BEET FARMS.

Yearly Impact:   مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

View 102

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic ResourcesDownload 0
Issue Info: 
  • Year: 

    2008
  • Volume: 

    0
Measures: 
  • Views: 

    129
  • Downloads: 

    0
Abstract: 

A POT EXPERIMENTAL WAS CONDUCTED FOR THE STUDY OF THE EFFECTS OF NACL ON THE ACCUMULATION OF SOME MINERAL AND ORGANIC MATTER IN DILL (ANETHUM GRAVEOLENS L.). A COMPLETELY RANDOMIZED DESIGN WAS ARRANGED WITH FIVE SALINITY LEVELS (0 , 25, 50, 75 AND 100 MM. NACL) AND FOUR REPLICATIONS. SEED CULTURING WAS DONE IN GREENHOUSE AND PLANTS IRRIGATION WITH THE HELP OF HOAGLAND NUTRITION SOLUTION. TOTAL DRY WEIGHT, STEM AND ROOT LENGTH, TOTAL LEAF CHLOROPHYLL, TOTAL SOLUBLE SUGARS AND NA+, K+AND CL- WERE MEASURED AT THE FINAL LEAF GROWTH STAGE. RESULTS SHOWED THAT TOTAL CHLOROPHYLL, DRY WEIGHT, K+IN LEAVES, STEM AND ROOT LENGTH SIGNIFICANTLY DECREASED WITH INCREASING SALINITY LEVELS, WHILE TOTAL SOLUBLE SUGARS INCREASED. IN ADDITION THE SIGNIFICANT INCREASE OF NA+AND CL- ACCUMULATION IN THE LEAVES PARTICULARLY AT HIGH SALINITY LEVELS LEAD TO NUTRIENT DEFICIENCY AND IONIC TOXICITY.

Yearly Impact:   مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

View 129

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic ResourcesDownload 0
Writer: 

TORKAMANI J.

Issue Info: 
  • Year: 

    2008
  • Volume: 

    0
Measures: 
  • Views: 

    107
  • Downloads: 

    0
Abstract: 

THE MAIN OBJECTIVE OF THIS STUDY WAS TO INVESTIGATE THE EFFECTS OF FISCAL POLICIES OF GOVERNMENT ON SOME OF THE MAIN VARIABLES OF AGRICULTURAL SECTOR. VECTOR AUTOREGRESSIVE APPROACH AND JOHANSEN COINTEGRATION ANALYSIS WERE USED. TO STUDY THE IMPACTS OF GOVERNMENT FISCAL POLICIES OVER 1976-2005, GOVERNMENT EXPENDITURE WAS USED AS A VARIABLE INDICATING THE GOVERNMENT INTERVENTION IMPACT ON AGRICULTURAL SECTOR, ESPECIALLY ON VALUE ADDED, EXPORT AND INVESTMENT OF THIS SECTOR.RESULT OF THE STUDY SHOWED THAT FISCAL POLICIES IN BOTH SHORT AND LONG RUN AFFECT VALUE ADDED AND INVESTMENT OF AGRICULTURAL SECTOR POSITIVELY AND STATISTICALLY SIGNIFICANT. WHILE THESE POLICIES AFFECT EXPORT OF AGRICULTURAL SECTOR POSITIVELY BUT THIS EFFECT IS CONSIDERABLE ONLY IN THE SHORT RUN.IN ORDER TO DETERMINE THE INFLUENCE TIME OF FISCAL SHOCK ON THE SELECTED VARIABLES, IMPULSE RESPONSE FUNCTION WAS USED. FINDING OF THIS PART INDICATED THAT CYCLICAL FLUCTUATIONS OF AGRICULTURAL VARIABLES ARE REDUCED BY IMPOSING FISCAL SHOCKS OVER TIME.BASED ON THE VARIANCE DECOMPOSITIONS TECHNIQUE, IT WAS REVEALED THAT PREDICTION ERROR OF VALUE ADDED MAINLY RESULT FROM THIS VARIABLE ITSELF AND GOVERNMENT EXPENDITURE CONTAINS A LOW SHARE IN PREDICTION ERROR OF VALUE ADDED. IN CASE OF INVESTMENT, EXCEPT FOR FIRST YEARS OF PREDICTION HORIZON, THE PREDICTION ERROR MAINLY CAUSED BY THIS VARIABLE ITSELF, IN OTHER YEARS GOVERNMENT EXPENDITURE IS THE MAIN SOURCE OF PREDICTION ERROR OCCURRED IN INVESTMENT. LESS THAN ONE-THIRD PART OF EXPORT PREDICTION ERROR CAUSED BY THIS VARIABLE ITSELF. WHILE THE SHARE OF INVESTMENT IN PREDICTION ERROR OF EXPORT HAS BEEN INCREASED CONSIDERABLY DURING THE PREDICTION HORIZON.

Yearly Impact:   مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

View 107

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic ResourcesDownload 0
Writer: 

PISHBIN S.

Issue Info: 
  • Year: 

    2008
  • Volume: 

    0
Measures: 
  • Views: 

    92
  • Downloads: 

    0
Abstract: 

THIS PURPOSE OF THIS STUDY IS DETERMINING THE TIMELINESS COST OF MACHINE OPERATION IN DIFFERENT STAGES OF SUGAR BEET PRODUCTION AND FACTORS AFFECTING IT. THE RESULTS SHOWED THAT TIMELINESS COST OF TILLAGE PRACTICES (PLOUGH AND LAND LEVELING), APPLYING FERTILIZERS BEFORE PLANTING AND TIMELINESS IN SEED PLANTING PER EVERYDAY LAG ARE 12237, 3147, 881 AND 2622 RIALS/HA RESPECTIVELY.ALSO, TIMELINESS COST OF MACHINE OPERATION IN STAGES APPLYING CHEMICAL FERTILIZERS AFTER PLANTING, APPLYING CHEMICAL POISONS AND CULTIVAR PER EVERYDAY LAG ARE 881, 1101 AND 3671 RIALS/HA RESPECTIVELY.

Yearly Impact:   مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

View 92

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic ResourcesDownload 0
Writer: 

MOHAMMADI HAMID

Issue Info: 
  • Year: 

    2008
  • Volume: 

    0
Measures: 
  • Views: 

    139
  • Downloads: 

    0
Abstract: 

THE OBJECTIVES OF THIS STUDY WERE TO ANALYZE MARKETING OF SAFFRON IN ISTAHBAN DISTRICT, FARS PROVINCE, AND TO INVESTIGATE FACTORS AFFECTING SAFFRON EXPORT OF IRAN. FINDINGS SHOWED TWO MARKETING PATHS FOR SAFFRON IN FARS PROVINCE. IN PATH ONE PRODUCER ARE FOLLOWED BY PERFUMERIES AND CONSUMERS, RESPECTIVELY. IN THIS PATH MARKETING MARGIN EQUALS TO 500, 000 RIALS PER KILOGRAM. IN ANOTHER PATH INCLUDING PRODUCERS – WHOLESALERS – RETAILERS – CONSUMERS, MARKETING MARGIN IS 520, 000 RIALS. PRODUCERS CAN GET MORE THAN 88% OF PRICE PAID BY CONSUMERS IN BOTH OF THE PATHS. MARKETING COSTS AND COMMISSION AGENTS’ SHARE FOR THE FIRST (SECOND) PATH ARE 351, 000 (353, 300) RIALS AND 64% (62%), RESPECTIVELY. BASED ON THE RESULTS, PRICE INEFFICIENCY WAS AS HIGH AS 70% AND 67% FOR THE FIRST AND SECOND PATHS, RESPECTIVELY. TECHNICAL INEFFICIENCY, HOWEVER, WAS 8.5% AND 7.8% FOR THE FIRST AND SECOND PATHS, RESPECTIVELY. REGRESSION RESULTS OF MARKETING MARGIN SPECIFICATIONS REVEALED THAT RETAILER PRICE AND MARKETING COSTS ARE OF MAIN FACTORS AFFECTING MARKETING MARGINS. IN THE CASE OF EXPORT FUNCTION, IT WAS ALSO REVEALED THAT IRAN’S SAFFRON EXPORT IS AFFECTED, TO A GREAT EXTENT, BY WORLD PRICE OF SAFFRON.

Yearly Impact:   مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

View 139

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic ResourcesDownload 0
Writer: 

Sharzei Abbas

Issue Info: 
  • Year: 

    2008
  • Volume: 

    0
Measures: 
  • Views: 

    343
  • Downloads: 

    128
Keywords: 
Abstract: 

DURING 2006-2007, PENICILLIUM SPECIES WERE COLLECTED FROM SHIRAZ VICINITY, INCLUDING BADJGAH AND FARS DAIRY FACTORY (RESPECTIVELY 15 AND 25KM NORTH OF SHIRAZ). FUNGI WERE ISOLATED FROM CONTAMINATED CULTURE MEDIA, ROTTED PLANT MATERIALS AND PASTURIZED CHEESE OF FARS DAIRY FACTORY. HYPHAL TIP ISOLATES WERE GROWN ON CZAPECK YEAST EXTRACT AGAR (CYA), MALT EXTRACT AGAR (MEA) AND 25% GLYCEROL NITRATE AGAR (G25N) AND EXAMINED AFTER SEVEN DAYS INCUBATION AT 25 °C IN THE DARK. NITROGEN AND SUGAR CONSUMPTION AND INDOLE PRODUCTION WERE ALSO TESTED WHENEVER NECESSARY USING CREATINE SUCROSE NEUTRAL AGAR (CSN) MEDIUM AND EHRLICH REAGENT, RESPECTIVELY. BASED ON MORPHOLOGICAL AND PHYSIOLOGICAL CRITERIA THE FOLLOWING SPECIES WERE IDENTIFIED: P.CHRYSOGENUM, P. CITRINUM, P. GRISEOFULVUM * AND P. WAKSMANII * (ALL FROM CHEESE), P. AURANTIOGRISEUM *, P. EXPANSUM (FROM BOTH CHEESE AND CONTAMINATED MEDIA), P. BREVICOMPACTUM, P. CITREONIGRUM *, P. CRUSTOSUM *, P. ROQEUFORTI, P. SOLITUM AND P. VIRIDICATUM (FROM CONTAMINATED MEDIA), P. ITALICUM (FROM CITRUS FRUIT) AND P. DIGITATUM (FROM KUMQUAT FRUIT, IN MARKET, ORIGINATED FROM NORTH OF IRAN). THE PENICILLIUM SPECIES WITH ASTERISK ARE NEW TO IRAN FLORA.

Yearly Impact:   مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

View 343

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic ResourcesDownload 128
Issue Info: 
  • Year: 

    2008
  • Volume: 

    0
Measures: 
  • Views: 

    158
  • Downloads: 

    0
Abstract: 

AGRICULTURAL MECHANIZATION IS A MULTIDIMENSIONAL ACTIVITY THAT INCLUDING MANY VARIED FACTORS AND ONE OF THE MOST IMPORTANT OF ITS APPLICATION IS CHANGE IN PRODUCTIVITY OF LABOR, MACHINERY, LAND AND FERTILIZER INPUTS. IN THIS STUDY, EFFECTS OF COMBINAT APPLICATION AS A NEW MECHANIZATION TECHNOLOGY ON PRODUCTIVITY INDEX OF WHEAT PRODUCT WERE ANALYZED IN FARS PROVINCE. THIS PROVINCE HAS HAD SOME ACHIEVEMENT IN AGRICULTURAL PRODUCTS AND MECHANIZATION DEVELOPMENT HAS BEEN VERY IMPORTANT IN THIS PROVINCE. THE RESULTS SHOWED THAT IN BOTH CONDITIONS INCLUDING BETWEEN TWO GROUPS THAT USING OLD METHODS OF SEED CULTIVATION AND NEW ONE AND IN THE GROUP OF COMBINAT USERS, GROSS MARGIN HAVE INCREASED 4.47 AND 6.70, RESPECTIVELY. NEVERTHELESS, LOW EXPERIENCE OF FARMERS WAS CAUSED MORE USAGE OF FERTILIZER AND HEREUPON, INPUT PRODUCTIVITY OF THE COMBINAT GROUP WAS LOWER THAN THE OLD TECHNOLOGY GROUP. IN THIS SITUATION, NOTWITHSTANDING HIGHER GROSS MARGIN OF COMBINAT GROUP, PRODUCTIVITY OF THIS GROUP WAS LOWER THAN OTHER ONE. THUS, WE CAN SAY THAT WITH OBSERVANCE OF PROMOTIVE RECOMMENDATION BY WHEAT FARMERS ABOUT CORRECT AND OPTIMUM USE OF INPUTS CAN IMPROVE INCREASED EFFECTS OF GROSS MARGIN AND PRODUCTIVITY OF COMBINAT. THEREFORE, INVESTMENT IN COMBINAT DEVELOPMENT MUST BE SYNCHRONOUS WITH OTHER TECHNICAL RECOMMENDATION IN ORDER TO INCREASING OF WHEAT FARMERS INCOME, PRODUCTIVITY AND WELFARE.

Yearly Impact:   مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

View 158

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic ResourcesDownload 0
Writer: 

TORKAMANI J.

Issue Info: 
  • Year: 

    2008
  • Volume: 

    0
Measures: 
  • Views: 

    108
  • Downloads: 

    0
Abstract: 

IN THIS PAPER, EFFECTS OF AGRICULTURAL RISK MANAGEMENT POLICIES ON FARMERS' AVERSION TO RISK AS WELL AS THEIR INCOME EQUITY WERE DISCUSSED. THEN, USING THE GINI INDEX, EFFECTS OF CURRENT AGRICULTURAL INSURANCE POLICIES ON FARMERS' INCOME EQUITY WERE EVALUATED. ALSO, AGRICULTURAL CROP INSURANCE DEMAND FUNCTION AND FARMERS' AVERSION TOWARD RISK WERE ESTIMATED BY USING THE GOODWIN MODEL AND ELCE METHOD, RESPECTIVELY. FARMERS DATA FOR THE CURRENT STUDY WERE DRAWING OUT FROM 170 FARMERS OF FASA REGION, IN FARS PROVINCE, WHO WERE SELECTED BY A STRATIFIED RANDOM SAMPLING METHOD. RESULTS OF THE STUDY REVEALED THAT, AGRICULTURAL CROP INSURANCE INCOME HAS POSITIVE EFFECT ON ENHANCING THE FARMERS' INCOME EQUITY AND DECREASING THEIR DEGREE OF RISK AVERSION. ALSO, AREA UNDER WHEAT, RATIO OF INDEMNITY PAYMENT TO INSURANCE PREMIUM, FARMER'S AGE, LEVEL OF EDUCATION, EXPERIENCE AND OWNERSHIP HAVE POSITIVE EFFECTS ON DEMAND FOR AGRICULTURAL INSURANCE.

Yearly Impact:   مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

View 108

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic ResourcesDownload 0
Issue Info: 
  • Year: 

    2008
  • Volume: 

    0
Measures: 
  • Views: 

    114
  • Downloads: 

    0
Abstract: 

IN ORDER TO YIELD EVALUATION OF LIME CULTIVARS ON MEXICAN LIME ROOTSTOCK, THIS STUDY WAS PERFORMED IN MINAB AGRICULTURAL RESEARCH STATION. THIS EXPERIMENT WAS DONE AS RANDOMIZED COMPELET BLOCK DESIGN WITH 4 REPLICATIONS AND 3 TREATMENTS CONSIST OF SCIONS OF LIME CULTIVARS (RODAN LIME OR TORNLESS LIME, MEXICAN LIME OR TORNY LIME AND PERSIAN LIME OR TAHITI LIME) ON MEXICAN LIME ROOTSTOCK THEN YIELD, FRUIT QUANTITY AND QUALITY TRAITS WAS MEASURED. RESULTS SHOWED THAT FRUIT OF MEXICAN LIME SCION ON MEXICAN LIME ROOTSTOCK HAVE HIGHER YIELD, TOTAL ACID AND VITAMIN C THAN RODAN AND PERSIAN LIME.

Yearly Impact:   مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

View 114

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic ResourcesDownload 0
Issue Info: 
  • Year: 

    2008
  • Volume: 

    0
Measures: 
  • Views: 

    127
  • Downloads: 

    0
Abstract: 

THE AIM OF THIS STUDY WAS TO INVESTIGATE THE DETERMINANT FACTORS OF SUSTAINABLE USE OF WATER RESOURCES IN FARS PROVINCE. SUSTAINABILITY WAS CONSIDERED FROM TWO VIEWPOINT USING TWO INDICES. IN ONE VIEW, SUSTAINABILITY OF WATER RESOURCES WAS CONSIDERED EQUAL TO REDUCE WATER WASTE. IN ANOTHER ONE, LAND AND CHEMICAL FERTILIZER PATTERN WAS ALSO CONSIDERED, LEADING TO A COMPOUND INDEX. THE DATA APPLIED TO THE ANALYSIS WERE INPUT USAGE PATTERN, PRODUCED CROPS AND SOCIO-ECONOMIC GATHERED THROUGH FARS PROVINCE FARMERS. THE RESULTS SHOWED THAT DEPENDING ON THE EXPANSION OF SUSTAINABILITY DEFINITION, THE AFFECTING FACTORS WILL BE DIFFERENT. IT WAS FOUND THAT INCREASED POPULATION AND DECREASED INCOME OF FARMER WILL BE RESULTED IN DECREASED SUSTAINABLE USE. IT WAS ALSO RECOGNIZED THAT INCREASED MANAGEMENT ABILITY MAY INFLUENCE THE SUSTAINABLE USE OF WATER RESOURCES FIRMLY. THE RESULTS ALSO SHOWED THAT PRESENCE OF RISKY CROPS IS NOT NECESSARILY REGARDED UNSUSTAINABLE.

Yearly Impact:   مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

View 127

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic ResourcesDownload 0
Issue Info: 
  • Year: 

    2008
  • Volume: 

    0
Measures: 
  • Views: 

    97
  • Downloads: 

    0
Abstract: 

WITH REGARD IMPORTANCE OLFACTORY SENSES IN STIMULATING FEEDING BEHAVIOR OF DIFFERENT FISH SPECIES, FEEDING RESPONSES OF ONE YEAR TRIPLOID CASPIAN TROUT WERE ANALYZED IN THIS RESEARCH WHEN OLFACTORY SENSE WAS STIMULATED WITH DIFFERENT AMINO ACIDS SOLUTION. FOR THIS PURPOSE FISH WERE EXPOSED TO 0.001 M OF TWENTY AMINO ACID SOLUTIONS IN 50*45*75 CM3 AQUARIUM FOR 3 MINUTES AND BEHAVIORAL RESPONSES OF THEM WERE INVESTIGATED. RESULTS OF TWENTY DIFFERENT AMINO ACID TESTS ON FISH OLFACTORY SENSE SHOWED FOOD SEARCHING BEHAVIOR WHEN METHIONINE WAS ADDED TO AQUARIUM WATER. REGARDING TO OBTAINED RESULTS, USING THE MOST EFFECTING AMINO ACID IN TRIPLOID CASPIAN TROUT FOOD RATIO AS WAS TESTED IN THIS RESEARCH CAN RESULT IN MORE STIMULATION OF FISH TO FOOD CONSUMPTION AND DECREASING OF CULTURE ENVIRONMENT CONTAMINATION.

Yearly Impact:   مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

View 97

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic ResourcesDownload 0
Issue Info: 
  • Year: 

    2008
  • Volume: 

    0
Measures: 
  • Views: 

    106
  • Downloads: 

    0
Abstract: 

IN THIS STUDY WE INVESTIGATED CHANGES IN SPECIES COMPOSITION, DENSITY, SPECIES DIVERSITY, RICHNESS AND EVENNESS ALONG A PREVIOUSLY STUDIED GRAZING GRADIENT IN SEPTIC RANGELAND OF IRAN, YAZD PROVINCE (NODUSHAN). FOR THIS RESEARCH USED COMPLETELY RANDOMIZED BLOCK DESIGN. SAMPLING WAS PERFORMANCE WITH USING STRATIFIED- SYSTEMATIC-RANDOM SAMPLING SCHEME. ON EACH PLOTS&NBSP;(2M2) ESTIMATED CANOPY COVER PERCENTAGE OF EACH PLANT SPECIES AND DENSITY FOR INVESTIGATION OF GRAZING INTENSITY ON SPECIES COMPOSITION, WAS ESTIMATED AS THE PERCENTAGE OF THE CANOPY COVER OF DOMINANCE SPECIES (ARTEMISIA SIEBERI), PLATABLE SPECIES, UNPLATABLE SPECIES, INVADER SPECIES AND TOTAL CANOPY COVER. SPECIES DIVERSITY WAS MEASURED BY CALCULATING DIVERSITY (SHANNON-WEANER AND SIMPSON INFORMATION INDEX), EVENNESS (PIELOU INDEX), RICHNESS (SPECIES NUMBER IN THE EACH SITE) AND DENSITY (PERENNIAL PLANT NUMBER IN THE EACH UNITE AREA). ANALYSIS OF DATA WERE CARRIED OUT USING SPSS 11.5 STATISTICAL PACKAGES. IN THIS STUDY RESULTS SHOWN, SPECIES COMPOSITION IS MORE SENSITIVE THAN THE SPECIES DIVERSITY AND DENSITY TO GRAZING TREATMENTS. FOR MONITORING OF ANIMAL GRAZING AND SIMPSON INDEX BETTER THAN THE SHANNON INDEX.

Yearly Impact:   مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

View 106

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic ResourcesDownload 0
Issue Info: 
  • Year: 

    2008
  • Volume: 

    0
Measures: 
  • Views: 

    95
  • Downloads: 

    0
Abstract: 

THE AIM OF THIS STUDY IS TO ASSESS HOW YEW TREES HAVE BEEN SCATTERED WITH CONSIDERING THE PHYSIOGRAPHICAL UNITS, THE RESERVED SITE IN AFRATAKHTE WAS STUDIED. THE AREA OF THIS REGION IS 198 HECTARES. TO ACHIEVE THIS PURPOSE, 66 PLOTS WITH 10 ACRE AREAS WERE CHOUSED BY SYSTEMATIC RANDOMLY SAMPLING METHOD. THE MAPS OF DIFFERENT PHYSIOGRAPHICAL UNITS WERE PROVIDED BY ARC VIEW 3.2 SYSTEM AND WERE CARRIED OUT THIS FOREST AND ACQUIRED DATA’S WERE ANALYZED BY EXCEL AND SPSS. THE OBTAINED RESULTS SHOWED THAT THE ABUNDANCE OF&NBSP; YEW SCATTER AND ITS BASAL ARE IN PER HECTARE HAVE NO SIGNIFICANT DIFFERENCES IN PHYSIOGRAPHICAL CLASSIFICATION AND YEW TREES HAVE BEEN SCATTERED WITH OTHER&NBSP; BROAD-LEAVED TREES WITHOUT EFFECT OF PHYSIOGRAPHIC. YEW SPECIES HAS MORE SCATTER IN LOW LATITUDE AND IN 0-10 % SLOPE. SO, THESE TREES CREATE PURE STANDS WITH VAST CANOPY. THIS SITE IS LOCATED AT 1300 TO 1900 A.S.L WHICH ITS ASPECT IS NORTHERN AND EASTERN. GENERALLY MORE THAN AREA OF THIS SITE IS LOCATED AT 60% SLOPE.

Yearly Impact:   مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

View 95

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic ResourcesDownload 0
Writer: 

SHIRZADI M.H.

Issue Info: 
  • Year: 

    2008
  • Volume: 

    0
Measures: 
  • Views: 

    164
  • Downloads: 

    0
Abstract: 

IN THIS PAPER WE TRIED TO STUDY CONCEPTS AND ISSUES OF ORANGE MARKETING USING DATA OBTAINED FROM QUESTIONNAIRE COMPLETED AMONG AND INTERVIEWED WITH PRODUCERS OF ORANGE IN JAHROM AND DARAB REGIONS, FARS PROVINCE AND ALSO USING INFORMATION OBTAINED FROM RETAILERS, WHOLESALERS AND BROKERS. PRIMARY PACKING AND TRANSPORTATION ARE ONLY MARKETING SERVICES IN OVERALL PATH EXISTED BETWEEN PRODUCERS AND FINAL CONSUMERS. WHOLESALE MARGINS IN THE MARKETING PATHES ARE HIGER THAN 2500 RIALS. PRODUCERS GET LESS THAN ONE-THIRD OF FINAL PRICE PAIED BY CONSUMER. BASED ON SPECIFICATION RESULTS, MARKETING COST REVEALED A NEGATIVE IMPACT, WHILE THE IMPACT OF RETAILER PRICE WAS FOUND POSITIVE. TECHNICAL EFFICIENCY WAS LOWER THAN PRICE EFFICIENCY. TOTAL EFFICIENCY OF DIFFERENT PATHS WERE FOUND AMOUNT 67 PERCENT.

Yearly Impact:   مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

View 164

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic ResourcesDownload 0
Issue Info: 
  • Year: 

    2008
  • Volume: 

    0
Measures: 
  • Views: 

    163
  • Downloads: 

    0
Abstract: 

NOWADAYS THE SAFFRON PRODUCING COUNTRIES TRIES TO INCREASE THEIR SHARE OF WORLD SUPPLY AND TO OBTAIN AN APPROPRIATE STATUS IN SAFFRON WORLD MARKET USING MODERN MARKETING METHODS. IRAN AS GREATEST PRODUCER OF SAFFRON IN THE WORLD MAY PLAY AN IMPORTANT ROLE IN SAFFRON WORLD MARKET. SPAIN IS THE MAIN RIVAL FOR IRAN AND IN RECENT YEARS HAS BEEN ABLE TO CAPTURE A PART OF IRAN SHARE, RESULTING TO REDUCED IRANIAN SHARE IN WORLD MARKET. MARKET STRUCTURE OF IRANIAN SAFFRON MARKET IS AS OLIGOPOLY AND THE MAIN DEMANDER ARE UNITED EMIRATE ARABIA, SPAIN, TURKMENISTAN, ITALY, RUSSIA, FRANCE, GERMANY, SWITZERLAND, AND SWEDEN, WITH 80 PERCENT OF IRANIAN SAFFRON EXPORT MARKET. THE IRANIAN SAFFRON IMPORTER HAS BEEN VARIABLE OVER THE STUDY PERIOD. HOWEVER, THE HERFINDAL AND CONCENTRATION INDICES HAVE INCREASED OVER THE MENTION HORIZON, INDICATION THAT EXCLUSIVENESS HAS INCREASED IN IMPORTING MARKET OF IRANIAN SAFFRON.

Yearly Impact:   مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

View 163

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic ResourcesDownload 0
Issue Info: 
  • Year: 

    2008
  • Volume: 

    0
Measures: 
  • Views: 

    149
  • Downloads: 

    0
Abstract: 

TO INVESTIGATE THE EFFECT OF TIME DURATION ON SEED GERMINATION OF OAK SEED, AFTER SEED COLLECTION, SEED WERE STORAGE ON +4, -1, -8 TEMPERATURES AT COOL HOME CONDITION. THEN WE DEAL WITH TO SAMPLING AND CULTURING AFTER ONE WEEK, TWO WEEK, THREE WEEK, ONE MONTH, TWO MONTH, FOUR MONTH AND SIX MONTH INTERVALS. SEEDS WERE CULTURED IN TWO METHODS (WITH BED AND NON-BED). THEN GERMINATION WAS MEASURED. THE RESULTS SHOWED THAT GERMINATION HAVE A DECREASING PROCEDURE BUT IT IS LOWER IN SEED WITH NO BED. ALSO SEED THAT WERE STORIED HAVE SHOWED A SIMULTANEOUSLY GERMINATION AFTER TWO MONTH STORAGE. AND WE CAN STORAGE SEED IN +4° C FOR SHORT PERIOD STORAGE BUT SEEDS NEED LOWER TEMPERATURE (-1 °C) FOR LONGER PERIOD STORAGE.

Yearly Impact:   مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

View 149

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic ResourcesDownload 0
telegram sharing button
whatsapp sharing button
linkedin sharing button
twitter sharing button
email sharing button
email sharing button
email sharing button
sharethis sharing button