نتایج جستجو برای: s2 cutting irrigation at vegetative stage
تعداد نتایج: 3983514 فیلتر نتایج به سال:
ABSTRACT Scarcity of good quality water is a limiting factor for irrigated agriculture, especially in semi-arid regions, which induces the use waters with high salt concentration crop irrigation. In view above, objective this study was to evaluate phytomass accumulation and production components colored cotton genotypes during different development stages, under conditions salinity, plants grow...
Soybean (Glycine max) is sensitive to drought stress, and increasing its yield, requires the selection of tolerate varieties which are adapted to semiarid or low water climates of Iran. In this research, the experiment was performed based on a factorial completely randomized design with three replications at 2013. Experimental factors were consisted of 8 genotypes of soybeans and 6 levels of dr...
In order to determine the best developmental stage of soybean at which maximum seed quality is attained under different shadings (S1, S2, S3: 0, 35 and 75% shade, respectively) and irrigation treatments (I1, I2, I3, I4: irrigation after 60, 90, 120 and 150 mm evaporation from class A pan, respectively), two split plot experiments using randomized complete block design with three replications we...
A split-split-plot design with three replications in two years of 2009 and 2010 was conducted to investigate the effect of different levels of irrigation water (main plot), salinity of irrigation water (sub-plot) and nitrogen fertilizer rate (sub-subplot) on maize growth rate and gas exchange. Irrigation treatments were I1 (1.0 crop evapotranspiration (ETc)+0.25ETc as leaching), I2 (0.75I1)...
In Guilan province, Sefidrud River, as the main source of irrigating rice in Guilan province, has been subjected to increasing salinity and a decreasing discharge because of decreasing in the volume of sefidrud dam, diverting water upstream and entering different sewages into the river. This research tries to determine optimum irrigation depth and intermittent periods in proportion to salinity ...
in order to evaluate phenological characteristics, yield and yield components of 18 cold tolerant lentil genotypes in fall planting under supplementary irrigation, an experiment was carried out based on randomized complete block design in 2006-2007 at research farm of college of agriculture, ferdowsi university of mashhad. irrigation was performed three times: immediately after sowing, 20 days ...
water scarcity is a major factor for limiting crop growth and development in arid and semi-arid regions. in order to study the effects of varying timing and severity of water deficit on mung bean phenological traits, a field experiment was carried out during 2009 growing season at agricultural research institute of zabol university. the experiment was laid out in split plot by using a randomize...
Drought is one of the most important stresses for crops that do not have same effects on growing stages. Recently, drought involved many various agriculture crops such as Date palm tree. This experiment carried out in a randomized complete blocks design with six treatments and five replications, in order to determine the critical and sensitive stages of date palm growth to water stress. The tre...
This research was conducted in order to determine chemical composition, gas production parameters, in vitro digestibility and ruminal degradability of Acroptilon repens at different phonological stages (vegetative, flowering and seeding) and its comparison with alfalfa hay and wheat straw in Completely Randomized Design. For this purpose, Acroptilon repens was prepared in three stages of growth...
The ROBODOC system is a promising new method for removing cement with high-speed milling. Heat is generated during the milling process. This study was designed to measure temperatures in the cutting area, and to assess the risk of heat injury and the effectiveness of irrigation. We measured temperatures at the bone-cement cutting area in three experimental settings, two involving the proximal a...
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