نتایج جستجو برای: wheat yields
تعداد نتایج: 150184 فیلتر نتایج به سال:
Russian Wheat Aphid Barley Yellow Dwarf Wheat Streak Mosaic Planting winter wheat as early as possible, particularly under dryland conditions, can increase yields by 10 percent or more, but also increases the risk for several serious pest problems that can cause major yield losses. Early planting can create a situation called a green bridge where pests and disease move from maturing cereals or ...
Global crop yields are limited by water and nutrient availability. Soil mulching (with plastic or straw) reduces evaporation, modifies soil temperature and thereby affects crop yields. Reported effects of mulching are sometimes contradictory, likely due to differences in climatic conditions, soil characteristics, crop species, and also water and nitrogen (N) input levels. Here we report on a me...
this study was carried out to determine effects of phosphorus residual applied to wheat on vetch (vicia panonioca) growth, yields and some soil physical, chemical properties in soil. the experiment was conducted with randomized completely block design in a field with three replications including four levels of p residual (applied for wheat p0, p15, p30, and p45 kg p2o5 in hectare) from tripl...
A potential application of the normalized difference vegetation index (NDVI) is to monitor crop yields over large areas. The study concentrated on the spring Mheat areas of North Dakota and South Dakota for several years (1989-1992). The NOAA AVHRR data was carefully analyzed to minimize processing and sampling errors. Sums of biweekly NDVI county averages over an eight week period from heading...
High temperatures are detrimental to crop yields and could lead to global warming-driven reductions in agricultural productivity. To assess future threats, the majority of studies used process-based crop models, but their ability to represent effects of high temperature has been questioned. Here we show that an ensemble of nine crop models reproduces the observed average temperature responses o...
One of the goals of organic crop production is to grow species which combinetraditional pro-healthy properties, innovative cultivation practices and harmonywith the environment. Among the ancient species the spring spelt is especiallypredisposed for organic farming. In comparison with common wheat spring spelthas a relatively short research history on physiological analysis of growth anddevelop...
Pleurotus ostreatus strains were cultured in liquid medium and on wheat straw. The yields of lovastatin were compared.
introduction: weather features and their variations have an important role in the yield of agricultural products, especially in rain-fed conditions. the main metrological variables that affected yields consist of precipitation, temperature, soil moisture and solar radiation. also, drought is one of the major constraints to production, especially the mid-season drought which occurs during the po...
Maize and wheat are main field crops on arable lands in Croatia. According to the data of the State Bureau for Statistics (Statistical Yearbook 2011) in the five-year period (2006-2010) mean used agricultural land in the category arable land and gardens in Croatia was 867123 ha. Mean harvested areas of maize (298412 ha) and wheat (176794 ha) occupied 55% of used arable land of the country. Majo...
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