Iranian Journal of Field Crops Research
Year:2017 | Volume:14 | Issue:4|Papers Count:20

Introduction Intercropping plays an important role in agriculture because of beneficial interactions. Intercropping of legumes and cereals is an old practice in tropical agriculture dating back to ancient civilization…..

Introduction In recent years, rainfall deficiency was an increasing problem in most countries; which limited the production of agricultural crops. Among abiotic stresses the plants encountered, drought stress is considered as the most important limiting factor in plants growth and reproduction in natural and agricultural systems through most parts of the world; while drought stress causes 45% increase in the crops among various stress making factors (biotic and abiotic)….

Introduction Soil salinity is a major limiting factor in agricultural development within Iran. Nitrogen is the most important nutrient that its uptake is limited over other elements under saline conditions due to decrease in the permeability of plant roots, soil microbial activity and mineralization of organic compounds and nitrate uptake by high concentrations of chloride anions in the root zone of the plant….

Introduction In agricultural ecosystems, organic fertilizers play an important role in producing sustainable agricultural production. Considering this Sajjadi Nik et al (2011) reported that with increasing of vermicompost inoculation with nitroxin biofertilizer, capsule number per sesame plant increased, so that the most of capsule number per plant (124.7) was observed in 10 t/h vermicompost with nitroxin inoculation….

Introduction Drought stress as the most important abiotic stress plays an important role in yield reduction of crops worldwide. Considering the extends and problems caused by the moisture stress, agronomic and breeding strategies in reducing yield loss are essential. In this regard, the identification and selection of effective characteristics of wheat under drought stress in increasing yield, is essential….

Introduction Integrated weed management is based on combination of several management methods, while reducing the rate of the use of herbicides, will result in efficient management and sustainable weed control. Ability of crop tolerance and prevent weed growth are two important traits in weed competition....

Introduction The study of growth parameters such as net assimilation rate (NAR), leaf area ratio (LAR), relative growth rate (RGR) and leaf area duration (LAD) are important for analyzing yield constraints. The growth parameters can be used to understand the crop response to environmental variables during the growing season. The aims of the present study were to 1) consider the growth indices using regression method and 2) identify relationships between growth parameters and grain yield in different safflower cultivars and sowing dates…..

Introduction Obtaining varieties with acceptable yield and tolerant to different arid and semi-arid climate condition of Iran is an important goal in canola breeding programs. Selection of genotypes base on one or more traits without regarding to correlation between them, could biases the expected results. Therefore, identifying of genetic correlation among traits especially in environmental stress condition is very important…….

Introduction Drought stress is the most important growth limiting factor for crop production. Sugar accumulation under drought stress strengthens and stabilizes cell membranes and maintains the water absorption and turgid property.Under stress conditions, proline will also maintain the turgor pressure and decreased the damages caused to plant membrane. Although proline concentrations may have undesirable effects on plant growth, because of deflecting photosynthetic resources to the processes that are not involved in plant growth.....

Introduction Although using animal manures and crop residues as a traditional method for increasing soil fertility and crop yield has a long history but Conventional agricultural systems rely on the use of chemical fertilizer due to its immediate availability of nutrients. In many of modern agricultural systems using chemical fertilizers as a fast and easiest way to reduce nutrient deficiency and increasing soil fertility is considered. Intensive and continuous use of chemical fertilizers leads to decreasing the stability and sustainability of agricultural systems and also poses major threat to environment and human health.....

Introduction Sunflower (Helianthus annuus L.) is one of the most important oil crops in the world. Iran is climatically regarded as an arid and semi-arid region in the world, where the lack of precipitation and its inappropriate distribution, high temperature and extensive evaporation makes the irrigation the main way for meeting plants water demand. Hence, studying the effect of irrigation on agriculture is more important in arid and semi-arid regions.....

Introduction Fertilizer management plays an important role in successful crop production. The biological fertilizers have been suggested not only to elimination or significant reduction of chemical fertilizer dependency but also increase of soil fertility and improvement of crop yield and quality….

Introduction Water consumption improvement in agriculture is very important compare with other sections. Because of existing complexity in production and exploitation processes and optimized application of irrigation water and nitrogen especially in dry and semi-dry areas facing with water constraint is an important goal in this field. Yield gap analysis can help to identify how much yield increase can be expected without examine the actual nutrient and water limitations. Application of crop growth models is one of those effective methods to reach these goals….

Introduction Soybean (Glycine max (L.) Merrill) is a leguminous annual crop belonging to the Fabaceae family, that because an important source of food containing 20 to 28 grain oil percent and high protein is the most important oilseed of worldwide interest…..

Introduction Details of the mutual effect with the agronomic factors, genetic and climatic conditions should be identified to crop a plant in a new area. The purpose of sowing date determination is to find the desired planting time as environmental factors at the time that is suitable for growing, seedling and plant’s survival and resume of growth and development and the plant does not meet unfavorable conditions. The plant density is the most important influencing factors on the development and production of medicinal plants and is an important factor in achieving optimal performance….

Introduction Water super absorbents are water absorbing natural or synthetic polymers (they may contain over 99% water). They have been defined as polymeric materials which exhibit the ability of swelling in water and retaining a significant fraction (>20%) of water within their structure, without dissolving in water content…..

Introduction Barely (Hordeum vulgare) is the fourth most important cereal after wheat, corn and rice. Regarding the role of breeding to increase barley grain yield a large number of studies have been done in different countries.However, a few studies have been performed across Golestan Province, in Iran. Therefore, this study was conducted to know what barley traits have changed with grain yield during recent years. How these traits will further improve the barley grain yield in the future breeding programs?....

Introduction Since discovery of food, clothing and shelter, human wanted to improve their physical sufferings, and using experience separated toxic plants from non – toxic ones and medicinal herbs from non – medicine. Medicinal herbs are agricultural products which have a very important role in the health of people in society......