EVALUATION OF SPATIAL VARIABILITY OF AVAILABLE IRON AND ITS AFFECTING FACTORS IN PADDY SOILS (CASE STUDY: CENTRAL PADDY FIELDS OF GUILAN)

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KHORAMIZADEH F.; DAVATGAR N.; TEHRANI M.M.; GHASEMI DEHKORDI V.R.; ASAADI OSKUIE E.

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Journal: Journal of Soil Management and Sustainable Production Year:2015 | Volume:4 | Issue:4 Page(s): 255-274

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Title

EVALUATION OF SPATIAL VARIABILITY OF AVAILABLE IRON AND ITS AFFECTING FACTORS IN PADDY SOILS (CASE STUDY: CENTRAL PADDY FIELDS OF GUILAN)

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Keywords

PADDY SOILSQ2

INTERPOLATIONQ2

GEOSTATISTIC METHODSQ2

GEOGRAPHIC INFORMATION SYSTEMS (GIS)Q2

Abstract

Iron is an essential nutrient for rice. Accurate assessment of this element in PADDY SOILS is very important. This study was done in order to investigate available iron, determine the impressive soil factors and choose the best INTERPOLATION method for determining spatial variability of plant available iron in 162 soil samples of the paddy fields of Guilan province, around Rasht city. Estimating and interpolating of variables were investigated with kriging (KG) and inverse distance weighting (IDW) methods with power one to four and the best INTERPOLATION method was selected using evaluating statistics such as ME and NRMSE. Organic carbon, clay and soil pH by controlling soil reduction conditions had the highest effect on available Iron. Linear, exponential, exponential and spherical semivariogaram models were fitted to soil available iron, organic carbon, clay and pH and the range of OC, clay and pH were 1910, 4940 and 4946 m respectively. IDW method was better than kriging for interpolating available iron. Spatial variability of available iron in the study area showed that high concentration of available iron was in soils with acidic pH (west and southwest regions of study area). Results showed that there was not any shortage in amount of available iron in the studied soils, but in order to retain the amount of available iron in the studied paddy fields, usage of iron fertilizers based on site specific management is necessary.

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APA: Copy

KHORAMIZADEH, F., DAVATGAR, N., TEHRANI, M.M., GHASEMI DEHKORDI, V.R., & ASAADI OSKUIE, E.. (2015). EVALUATION OF SPATIAL VARIABILITY OF AVAILABLE IRON AND ITS AFFECTING FACTORS IN PADDY SOILS (CASE STUDY: CENTRAL PADDY FIELDS OF GUILAN). ELECTRONIC JOURNAL OF SOIL MANAGEMENT AND SUSTAINABLE PRODUCTION, 4(4), 255-274. SID. https://sid.ir/paper/209882/en

Vancouver: Copy

KHORAMIZADEH F., DAVATGAR N., TEHRANI M.M., GHASEMI DEHKORDI V.R., ASAADI OSKUIE E.. EVALUATION OF SPATIAL VARIABILITY OF AVAILABLE IRON AND ITS AFFECTING FACTORS IN PADDY SOILS (CASE STUDY: CENTRAL PADDY FIELDS OF GUILAN). ELECTRONIC JOURNAL OF SOIL MANAGEMENT AND SUSTAINABLE PRODUCTION[Internet]. 2015;4(4):255-274. Available from: https://sid.ir/paper/209882/en

IEEE: Copy

F. KHORAMIZADEH, N. DAVATGAR, M.M. TEHRANI, V.R. GHASEMI DEHKORDI, and E. ASAADI OSKUIE, “EVALUATION OF SPATIAL VARIABILITY OF AVAILABLE IRON AND ITS AFFECTING FACTORS IN PADDY SOILS (CASE STUDY: CENTRAL PADDY FIELDS OF GUILAN),” ELECTRONIC JOURNAL OF SOIL MANAGEMENT AND SUSTAINABLE PRODUCTION, vol. 4, no. 4, pp. 255–274, 2015, [Online]. Available: https://sid.ir/paper/209882/en

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