نتایج جستجو برای: natural pastures
تعداد نتایج: 485137 فیلتر نتایج به سال:
In highland pastures, grazing is a common method for managing sheep due to the abundance of grassland resources. However, it easy encounter situations such as stray, deviation and attacks from natural enemies; therefore, remote monitoring in pastures an urgent problem be solved. This paper proposes mid-infrared segmentation based on multi-level region fusion maximum between-class variance algor...
Alfalfa (Medicago sativa L.) persistence and forage and cow-calf production were evaluated on pastures containing smooth bromegrass with or without grazing-tolerant or hay-type alfalfa cultivars rotationally stocked in either a season-long or complementary system. In 1997, six 2.02-ha pastures were seeded with smooth bromegrass, a mixture of a grazing-tolerant alfalfa (Amerigraze variety) and s...
Due to physiography and weak structure, the pasture soils in Boroojen are potentially degradable. Converting pastures to agricultural land accelerates the degradation processes. A study was conducted in 1999 to show the effects of almost 20 years of farming on originally pasture land on soil physical properties, fertility, and tilth index of pastures in Boroojen region in Chahar Mahal and Bakht...
Free radicals are not only destructive to the living cells but also reduce the quality of animal products through oxidation. As a result the superoxide anion radical (O2-), one of the most destructive reactive oxygen species, is a matter of concern for the animal scientists as well as feed manufacturers to ensure the quality of product to reach consumers demand. The superoxide anion radical sca...
Trials were conducted on 3 commercial sheep farms in Sweden to assess the effect of administering spores of the nematode trapping fungus, Duddingtonia flagrans, together with supplementary feed to lactating ewes for the first 6 weeks from turn-out on pastures in spring. Also control groups of ewes, receiving only feed supplement, were established on all 3 farms. Groups were monitored by intensi...
BACKGROUND Hypoglycin A, found in seeds of Acer negundo, appears to cause seasonal pasture myopathy (SPM) in North America and is implicated in atypical myopathy (AM) in Europe. Acer negundo is uncommon in Europe. Thus, the potential source of hypoglycin A in Europe is unknown. HYPOTHESIS AND OBJECTIVES We hypothesized that seeds of Acer pseudoplatanus were the source of hypoglycin A in Europ...
Canada’s agriculturally important lands include lands that are currently used for agricultural purposes (e.g. croplands, rangeland, pastures) as well as those that show potential for future agricultural development (e.g. natural grasslands). However, because these lands generally cover large geographical extents, their assessment by conventional ground survey techniques are often time-consuming...
approximate conditions in natural ecosystems, managed ecosystems are characterized by a substantial organic matter export mainly as harvest (e.g. Schulze et al. 2009). Given that currently ca. 12% of the global land area of ca. 13.4 Gha is cropped and ca. 26% used as pastures, the role of carbon exports needs to be addressed or, in case I misunderstood, the procedure of how inputs were derived ...
Abstract Background Semi-natural pastures are unfertilized grasslands with a long history of traditional low-input grazing management. This kind recognized for their high species richness. However, as consequence modernization agriculture, many the semi-natural have been lost during last century, leading to serious threat farmland biodiversity. relatively low in productivity. Hence, increase pr...
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