a study was conducted to investigate the effect of different planting densities and nitrogen doses on essential oil content and yield in herb and leaves of basil (ocimum basilicum l.). the research was conducted during 2007 and 2008 using split-plot randomized complete block design with four replications. the experiment consisted of four plant densities (30×20, 40×20 and 50×20 cm) as the main p...

in order to study the competition effects of redroot pigweed (amaranthus retroflexus) and millet (panicum miliaceum) on maize performance under different rates of n fertilizer, a field experiment was conducted in 2009 in the research fields of tarbiat modares university in tehran as a randomized complete block design with factorial arrangement of treatments and three replications. accordingly, ...

The study was conducted to determine the effects of nitrogen fertilizing systems and harvest frequency on levels of hard-seedness and hard-seed softening trend in M. scutellata var. Robinson. The study was carried out at Agricultural Research Farm of University of Tehran in Karaj during 2006. The experimental design was a randomized complete block with a split-split plot arrangement with four r...

in order to investigate the effect of nitrogen fertilizer on tea yield and yield components in supplemental irrigation and rain fed conditions an experiment was conducted at feshalam tea research station in fouman (guilan) during (2008-2010). in this study, line-source irrigation technique and the strip plot experiment on randomized complete block design was used. six levels of nitrogen, zero, ...

in order to investigate the effects of vermicompost and chemical fertilizers on growth characteristics, yield and yield components of marshmallow (altheaeofficinalis l.), a field experiment was conducted as factorial layout based on a randomized complete block design with three replications at faculty of agriculture, ferdowsi university of mashhad, iran, during growing season of 2012. experimen...

in order to evaluate the impact of different amounts of nitrogen fertilizer on growth and yield of two forage sorghum cultivars, a 2-year field experiment was carried out at the college of agriculture, shiraz university, shiraz, iran during 2010 and 2011 growing seasons. two factorial experiments were carried out in randomized block design with three replicates, in which the treatments included...

his paper seeks to understand the influence of different levels of fertilizer nutrients on annual yield of cardamom in cardamom hill reserves (chr) under rain fed situation. field experiment conducted at crs, pampadumpara during 1994-2002 on nutrient levels with sources revealed that increasing the levels of nitrogen, phosphorus and potassium had increased the yields of cardamom up to 125: 125:...

The co-inoculation of mulberry with phosphate solubilizing micro-organisms, nitrogen fixing bacteria and arbuscular mycorrhiza has influenced its macronutrient uptake through leaf. The data revealed that maximum nitrogen (484.12 kg /ha) , phosphorus (59.83 kg /ha) and potassium (244.61 kg/ha) uptake through leaf has taken place due to co-inoculation treatments as compared to the un inoculated t...

urea is the most common form of nitrogen fertilizer used in sugar beet cultivation. urea has a high solubility and its losses are high and consequently its efficiency is low. it is supposed that urea solubility can be limited and its efficiency can be increased by using slow-release nitrogen fertilizers. by conducting an experiment in three important sugar beet cultivation areas of khorasan pro...