نتایج جستجو برای: arid and semi arid areas

تعداد نتایج: 16869166  

2012
M. MOYO P. DORWARD

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...

Journal: :مرتع و آبخیزداری 0
فریدون سرمدیان استادیار گروه علوم و مهندسی خاک، دانشکده مهندسی و فناوری کشاورزی، دانشگاه تهران علی کشاورزی استاد گروه علوم و مهندسی خاک، دانشکده مهندسی و فناوری کشاورزی، دانشگاه تهران

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...

2017
Carlos Alberto Fragoso de Souza Diogo Xavier Lima Luciana M.S. Gurgel André Luiz Cabral Monteiro de Azevedo Santiago

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...

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...

Journal: :به نژادی نهال و بذر 0
مظفر روستایی m. roustai ِdryland agricultural research institueموسسه تحقیقات کشاورزی دیم سیدکریم حسینی k. hossaini طهماسب حسین پور t. hossainpour مهدی کلاته m. katata مقصود حسن پورحسنی m. hassanpour-hossni عارف امیری a. amiri غلام رضا خلیل زاده

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...

Journal: :Ecology of food and nutrition 2011
Donald M G Njarui Mwangi Gatheru John M Wambua Simon N Nguluu David M Mwangi George A Keya

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,...

2017
Chris C. Funk Molly E. Brown

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 ...

2015
Dave Joubert Walter H Schacht

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...

Journal: :journal of food biosciences and technology 2014
m. honarvar i. alimoradi

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...

Journal: :مرتع و آبخیزداری 0
فریبا علوی زاده دانشجوی کارشناسی ارشد مرتع داری، دانشکده منابع طبیعی و محیط زیست، دانشگاه فردوسی مشهد کمال الدین ناصری استادیار دانشکدة منابع طبیعی و محیط زیست، دانشگاه فردوسی مشهد علی گلکاریان استادیار دانشکده منابع طبیعی و محیط زیست، دانشگاه فردوسی مشهد علی طویلی دانشیار دانشکده منابع طبیعی، دانشگاه تهران

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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