Nitrogen is an indispensable element for plants, being the fourth element as a percentage of plants by carbon, oxygen and hydrogen, in his absence they do not develop as a result of inhibition of chlorophyll synthesis and loss of nutritional values of fruits, hence the efficiency of this element in plans fertility of all plants. Conversely nitrogen (N), plants sensitizes the fall and decreases ...

in order to study the effects of potassium application on uptake and allocation of nitrogen and seed protein on two lentil cultivars in rain-fed condition a factorial experiment based on randomized complete block design with three replications was conducted at ardabil research center for agriculture and natural resources, in 2008. three potassium levels (0, 30 and 60 kg.ha-1), three nitrogen le...

a four-year field experiment was conducted to understand the characters of nutrient accumulation and distribution in maize under different yield levels, so as to provide scientific guidance for effective utilization of mineral fertilizers, and eventually for high yield of spring maize. the grain yield, nutrient (nitrogen, phosphorous, potassium) accumulation and uptake efficiency were evaluated...

this research was conducted under greenhouse conditions to evaluate the optimum combination of irrigation and fertilizer levels to attain the best yield and quality of tomato crop. the experiment was conducted by using a split-plot design with three replicates. irrigation levels were applied to the main plots and fertilizer levels to the sub-plots. for each experimental unit, the irrigation lev...

The long-term applications of different fertilizers (chicken manure, swine and organic fertilizer) on the microorganisms a corn field were investigated. microbial communities during four periods (seedling, three-leaf, filling mature periods) comprehensively studied with molecular biology technology. Results showed that most nutrient contents (organic matter, nitrogen, phosphorus, potassium) lev...

for investigation deficit irrigation and nitrogen application effect on nutrients uptake of henna ecotypes, this research was conducted in the form of split-split-plot on the basis of randomized complete block design with four replications in the research field of islamic azad university, jiroft, iran in 2013-2014. the main, sub and sub-sub plot were deficit irrigation (100, 75 and 50% of crop ...

Goal. To study the peculiarities of use and balance nutrients sorghum for grain plants using different fertilizer systems. Methods. Field short-term — to effect doses timing mineral fertilizers on nutritional regime, growth dynamics, development grain; laboratory establish quantitative qualitative characteristics soil; mathematical calculate yield removal soil elements. Results. The data resear...

A pot experiment was conducted during Kharif season, 2005 to ascertain the response of different organic sources viz., wheat straw, farm yard manure (FYM), vermicompost and poultry manure to rice (Oryza sativa) and also to monitor the effect of manuring on soil carbon pools. Application of poultry manure and vermicompost alongwith chemical fertilizers for supply of nitrogen, phosphorus and pota...

carbon (C), hydrogen (H), oxygen (O), nitrogen (N), phosphorus (P), potassium (K), sulfur (S), calcium (Ca), magnesium (Mg), boron (B), chlorine (Cl), copper (Cu), iron (Fe), manganese (Mn), molybdenum (Mo), nickel (Ni), and zinc (Zn). These 17 essential elements, also called nutrients, are often split into three groups (fig. 1). The first group is the three macronutrients that plants can obtai...