نتایج جستجو برای: agricultural crops
تعداد نتایج: 128424 فیلتر نتایج به سال:
Remote sensing is an efficient technology and worthy source of earth surface information, as it can capture images of reasonably large area on the earth. Due to advancement in the sensor technologies there is availability of high spatial as well as spectral resolutions imageries, and also non imaging Spectroradiometer. With the use of these imaging and non-imaging data we can easily characteriz...
Black-grass (Alopecurus myosuroides HUDS.) is a common weed of cereal crops widely spread in Northern Europe. Even if the first Belgian case of resistance was reported in 1996, until now, Belgium was quite spared of this problem and only a few restricted areas were concerned: the Polders, the marshland of the Escaut River and the Fosses-la-Ville region. About 90 seed samples were collected trou...
As stated by the editors Brandt, C. and Thornes, J., 1996, “Both the vegetation and land use in the Mediterranean areas of Europe strongly reflect human activity since at least the Bronze Age”. Putting it briefly for the recent past ca. ninety-year period, the natural land‐ scape covered by the original “silvalusitana” has been deforested for agricultural purposes and substituted by monoculture...
Changes in the global production of major crops are important drivers of food prices, food security and land use decisions. Average global yields for these commodities are determined by the performance of crops in millions of fields distributed across a range of management, soil and climate regimes. Despite the complexity of global food supply, here we show that simple measures of growing seaso...
The Legal, Ethical, and Environmental Issues of “Agent Orange Corn” and Genetically Modified Crops. This paper addresses the recent flap over the pending approval by the Federal Government of what has become known by some as “Agent Orange Corn” and the greater Genetically Modified Crop Debate by Dr. Albert Clark The Legal, Ethical, and Environmental Issues of “Agent Orange Corn” and Genetically...
1 West African Centre for Crop Improvement, College of Agriculture and Consumer Sciences, University of Ghana, P. M. B. LG 30, Legon, Ghana. 2 CSIR-Crops Research Institute, P. O. Box 3785, Kumasi, Ghana. 3 Deparment of Agricultural and Resource Economics, Faculty of the Professions, University of New England, Armidale, NSW, 2350, Australia. 4 CSIR-Savanna Agricultural Research Institute, P. O....
C(3) crops are generally considered more sensitive than C(4) crops to the elevated CO(2) and O(3), but it is unclear whether the concentrations of phenolic compounds in them are affected. In this paper, an enrichment experiment with open-top chamber was conducted to examine the effects of elevated CO(2), O(3), and their combination on the contents of total phenolic compounds and flavone in the ...
BACKGROUND A recent Lancet article reported the first reliable estimates of suicide rates in India. National-level suicide rates are among the highest in the world, but suicide rates vary sharply between states and the causes of these differences are disputed. We test whether differences in the structure of agricultural production explain inter-state variation in suicides rates. This hypothesis...
Four million hectares of wheat are planted after cotton and rice in Pakistan. Little research has been done on the aronomy of wheat following these crops on a cropping pattern basis. Both of these crops delay wheat planting, and it is estimated that 40–50 kg of wheat grain is lost for every day that planting is delayed past 20 November. Current recommendations for land preparation, fertilizer u...
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