نتایج جستجو برای: semi-arid environment

تعداد نتایج: 659440  

Journal: :desert 2013
m. mousaei sanjerehei m. jafari a. mataji n. baghestani meybodi m. r. bihamta

the purpose of this study was to evaluate the species-environment relationships in arid and semi-arid rangelandsof nodushan, yazd. the plant species cover and the environmental variables were measured at 9 sites. soil sampleswere taken for measurement of 12 attributes in 0-10 cm and 10-80 cm layers. vegetation was classified using twowayindicator species analysis (twinspan). data was analyzed u...

Journal: :journal of agricultural science and technology 2010
s. er-raki a. chehbouni j. ezzahar s. khabba e. k. lakhal

this paper reports the results of using three empirical methods (makkink, priestley-taylor and hargreaves) for estimating the reference evapotranspiration (et0) in the semi-arid region of tensift al haouz, marrakech (center of morocco). the penman-monteith equation, standardized by the food and agriculture organization (fao-pm), is used to evaluate the three empirical methods. the obtained et0 ...

Journal: :ecopersia 0
yahya parvizi assistant professor, department of soil conservation and watershed management, agriculture and natural resource research center of kermanshah, areeo, kermanshah, iran mosayeb heshmati assistant professor, department of soil conservation and watershed management, agriculture and natural resource research center of kermanshah, areeo, kermanshah, iran mohammad gheituri assistant professor, department of soil conservation and watershed management, agriculture and natural resource research center of kermanshah, areeo, kermanshah, iran

the effects of different climatic, soil, geometric, and management factors on soil organic carbon (soc) degradation and sequestration potential was evaluated in the semi-arid zone of mereg watershed, west of iran. two nonparametric methods, viz. classification and regression tree (cart) and feed forward back propagation artificial neural network (ann) were compared with parametric multivariate ...

Journal: :iranian journal of applied animal science 2015
n. muhammad s. altine a. abubakar u.m. chafe m.m. mikailu

the study was conducted to determine the effect of varying protein levels and preservation method on external egg qualities of japanese quails. a total of 180 birds were randomly allotted into three dietary treatments in a completely randomized design (crd) replicated six times. a factorial arrangement of 3 × 4 × 4 which involves 3 protein levels (15, 20 and 25% crude protein), 4 storage method...

2013
Soumaya KHALDI Mohamed El GAZZAH

Cynara cardunculus.L exhibits an important adaptability to arid and semi-arid regions where high salinity is frequently present. Aiming to introduce its cultivation in the Mediterranean environment especially in Tunisia, it seemed interesting to study seed germination of eight populations of cardoon in four concentrations of NaCl: 0g/L, 2g/L, 4g/L, and 8g/L. Our results showed a good variabilit...

Journal: :International Journal of Remote Sensing 1995

In arid and semi-arid environments, groundwater plays a significant role in the ecosystem. In the last decades, groundwater levels have decreased due to the increasing demand for water, weak irrigation management and soil damage. For the effective management of groundwater, it is important to model and predict fluctuations in groundwater levels. In this study, groundwater table in Kashan plain ...

Journal: :JES. Journal of Engineering Sciences 2013

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