In order to study the effects of post-anthesis heat stress and nitrogen levels on grain yield and yield components of wheat genotypes, two separate field experiments were conducted in delayed and optimum sowing dates under Ahvaz conditions (2006-2007). The Ahvaz site located in south west of Iran (32°20' N, 40°20' E) with subtropical climate condition. The experiment site had a moderate w...

this fertility experiment was carried out using split plots based on a randomized complete block design of three replications in 2006 at sari agricultural sciences and natural resources university. the aim of the experiment was to investigate some macronutrient and micronutrient accumulation in leaves of different soybean cultivars as influenced by some organic fertilizer types and levels. main...

enhancing nitrogen use efficiency is one of the most important strategies for improving productivity in agriculture and reducing risk of environmental pollutions in sustainable agriculture. in order to study the effects of different levels of organic manure and chemical fertilizer on nitrogen uptake efficiency (nupe), nitrogen utilization efficiency (nute) and nitrogen use efficiency (nue) of i...

this experiment was conducted in andimeshk region (north of khouzestan) to study the effects of nitrogen levels on plant characters of  two potato cultivars (solanum tuberosum l.) in identical conditions of poultry manure, in 2012-2013 crop year, as a factorial randmaized complete block design with three replications. the first factor was consisting of four nitrogen levels (0, 70,140 and 210 kg...

the study was carried out to examine the effects of urban sewage and nitrogen fertilizer levels on yield quantity and quality forage of sweet corn was evaluated in yasouj at 2009. the main experimental factor consisted of 5 irrigation levels including: common irrigation water without sewage effluent until the end of plant growth (i1), the first half of plant growth period with sewage effluent a...

abstract atrazine biodegradation by bacteria is one of the most important aspects of bioremediation. atrazine can be degraded by various species of bacteria. bacteria use atrazine as nitrogen and carbon sources. the aim of this study was to determine atrazine degradation by pseudomonas fluorescence and pseudomonas aeruginosa. the experiment consisted of two pseudomonas bacteria, three levels of...

kochia scoparia is a salt resistant plant that can be used in producing forage in the areas with salt water and soil resources. one of the problems which produce the forage plants in these areas decreases the function and quality of the forage in irrigation condition with salt water. therefore, using the chemical fertilizers can be considered as a useful solution. this study was conducted to ev...