نتایج جستجو برای: arid and semi arid areas
تعداد نتایج: 16869166 فیلتر نتایج به سال:
Farmers in semi-arid Zimbabwe prioritise climate variability as their major agricultural productivity-reducing problem. This paper raises the importance of considering local farmers’ perceptions on climate risk, as this greatly influences on-farm investments and decision-making in agricultural management and production in semiarid Zimbabwe. A study was conducted in two districts of semi-arid Zi...
data mining enables generalization of data of soil to remote areas and which is able to up/down scale of data in wide ranges of level that facilitate the decision-making process of executives. cation exchange capacity (cec) is one of the most important parameters in soil database and shows the ability of a soil to retention of minerals and pollutants. due to low organic matter and specific mine...
Mucorales comprises fungi commonly isolated as saprobes from soil, dung, stored grains and plants. Although these fungi have been studied in several countries, there are relatively a few reports of them in semi-arid areas. Therefore, the aims of the present study were to assess and compare the Mucorales communities in dung from different species and breeds of herbivores in the semi-arid of Pern...
Performance comparison of land change modeling techniques for land use projection of arid watersheds
The change of land use/land cover has been known as an imperative force in environmental alteration, especially in arid and semi-arid areas. This research was mainly aimed to assess the validity of two major types of land change modeling techniques via a three dimensional approach in Birjand urban watershed located in an arid climatic region of Iran. Thus, a Markovian approach based on two suit...
kohdasht is a new improved spring bread wheat (triticum aestivum l.) cultivar suitable for warm and semi arid areas of iran. in 1990-91 cropping season, line tr 801020029 r-1r-6r-0r was received from icarda under 9th semi arid area screening nursery. based on agronomic characteristics, resistance to diseases and abiotic stresses under field conditions, tr 8010200-29r-1r-1r-6r-0r was selected fo...
Milk consumption in the semi-arid regions of Kenya is not well understood. A study was carried out on consumption of milk and milk products in the semi-arid region of eastern Kenya. A total of 135 rural and 126 urban households were interviewed. Raw milk was the most popular and was consumed by 99% and 84% of rural and urban households, respectively. Generally as degree of processing increased,...
Early warning systems (EWS) tend to focus on the identification of slow onset disasters such famine and epidemic disease. Since hazardous environmental conditions often precede disastrous outcomes by many months, effective monitoring via satellite and in situ observations can successfully guide mitigation activities. Accurate short term forecasts of NDVI could increase lead times, making early ...
Visual obstruction as a method to quantify herbaceous biomass in southern African semi-arid savannas
Visual obstruction as a method to quantify herbaceous biomass in southern African semi-arid savannas Dave Joubert, Larkin A Powell & Walter H Schacht To cite this article: Dave Joubert, Larkin A Powell & Walter H Schacht (2015) Visual obstruction as a method to quantify herbaceous biomass in southern African semi-arid savannas, African Journal of Range & Forage Science, 32:3, 225-230, DOI: 10.2...
determination of the amount of sugar in sugar beet is usually accomplished by polarimetric method in sugar industry. this method is not accurate due to impurities such as sodium, potassium and amino-nitrogen that are present and might cause some errors in the evaluation of the technical quality of sugar beet. in this research, 7309 samples of sugar beet from two semi- arid county, isfahan and c...
soil erosion is a main hazard in most area of the country specially in arid and semi-arid regions and itis very important because of sedimentation, pollution, increased flooding and its negative effects onsoil productivity. one of the features of arid and semi-arid areas is the presence of low cover ofvascular plants. these empty spaces are usually good niches for biological soil crusts or cryp...
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