Iron (Fe) and manganese (Mn) are essential nutrients for plants. Application of high levels of either Fe or Mn is often accompanied by relatively low levels of uptake for the other nutrient. The antagonistic relationship of these nutrient elements may occur either during absorption by roots or during translocation from roots to shoot. A greenhouse study was carried out to study the effect of so...

Optimizing the spatial distribution of plants under normal conditions water and fertilizer is widely used by farmers to improve soybean yield. However, relationship between yield plant in field has not been well studied. This study examined effect planting density pattern on growth, components, canopy light interception, dry matter accumulation. We also analyzed photosynthetic rate, accumulatio...

Nitrogen (N) management strategies that maintain high crop productivity with reduced water quality impacts are needed for tile-drained landscapes of the US Midwest. The objectives of this study were to determine the effect of N application rate, timing, and fall nitrapyrin addition on tile drainage nitrate losses, corn ( L.) yield, N recovery efficiency, and postharvest soil nitrate content ove...

low phosphorous (p) availability in soils limits production of soybean [glycine max (l.) merr.] around the world. this study was conducted to determine whether exogenous expression of the rice (oryza sativa l.) phosphates transporter gene ospt2 would increase inorganic phosphates (pi) acquisition and improve yield in transgenic soybean. cotyledonary-node explants of the soybean were inoculated ...

cotton (gossypium hirsutum l. cv. varamin ) an important industrial crop of iran, is grown in 300,000 ha, with an average seed -cotton yield of 1750 kg.ha-1. the main obstacle in the way of increasing average cotton yield is imbalanced fertilizer use. along with urea and triple super phosphate, cotton growers also need k, mg, zn, fe, mn, cu, and b, so these elements’ critical levels should ...

Current corn and soybean productivity data is needed in Illinois for land-use planning, sustainable farm management, and accurate land appraisal. The out-of-date source of soil productivity data is Circular 1156 Soil Productivity in Illinois (Fehrenbacher et al., 1978, Soil productivity in Illinois. UIUC. College of Agriculture. COOP. EXT. SERV. Circular 1156). A new major analysis based on cur...

seed inoculation by means of mycorrhizal fungi can alleviate the side-effects of fungicides on production of crops and their yields. an experiment was conducted in 2009 at the research field of islamic azad university, faculty of agriculture, mahdasht, karaj. in order to investigate the influence of different kinds of fungicides on colonization of mycorrhizal species and on grain yield in soybe...

intercropping is considered for increasing and stability of yield in per unit. in order to study the effects of soybean (glycine max l.) and millet (panicum miliaceum l.) replacement intercropping on agronomic traits, diversity of weeds and soil biological activity, an experiment was conducted at the research station of agricultural faculty, of bu-ali sina university, in 2014. the experiment wa...