نتایج جستجو برای: yield reduction
تعداد نتایج: 674328 فیلتر نتایج به سال:
for determination of water stress effects in different growth stages of sugar beet and optimum water usage on quantity and quality of sugar beet, this study was performed using randomized complete blocks design in factorial experiment with 12 treatments and 4 replications from 1999 to 2001 in agricultural research center of hamadan. the first factor was non-irrigation in 3 stages of growth (s1-...
a split plot experiment based on complete block design with three replications was carried out to evaluate the effect of irrigation and potassium fertilizer on yield and yield components of green beans, in 2011 at ahvaz. two levels of irrigation (normal irrigation and drought) and four levels of potassium sulfate fertilizer (0, 25, 50 and 100 kg ha-1) were evaluated in this study. the results o...
¬¬¬one of the most important limitations for selection of second crop in paddy fields in guilan is waterlogging in the second half of the year. for an evaluation of waterlogging effect (in adequate drainage) on canola yield, a lysimeter study was conducted implementing -10,-5,0 and +5 cm water level for 2,5,7 and 10 day durations at 3 plant growing stages namely: emergence, beginning of floweri...
This experiment was conducted to determine evapotranspiration, crop coefficient and water use efficiency of cucumber and tomato for a period of six months in the Resarch Greenhouse of Urmia University. Daily evapotranspiration of cucumber, tomato and reference crop was measured using lysimeter method. Based on the results, cucumber evapotranspiration for growth period of 130 days was 272.4 mm a...
Background and purpose: One of the solutions for sludge production is to reduce that via decreasing the yield coefficient by oxic-settling anoxic process with different oxidation reduction potential (ORP) in sequencing batch reactor (SBR) activated sludge. Materials and methods: We used 2 SBR reactors (20 L volume) that were controlled online. At a steady state in reactors, some parameters suc...
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