نتایج جستجو برای: arid
تعداد نتایج: 18687 فیلتر نتایج به سال:
Livestock fodder needs in nearly all developing countries now exceed the sustainable yield of rangelands and other forage resources. In Africa, overgrazing has reduced range productivity virtually everywhere. It is important to provide animals with adequate nutrition to ensure the high productive and reproductive performance. Meanwhile, it is necessary to avoid the deterioration of the pasturel...
Kenyan Maasai is a pastoral society that lives in arid and semi-arid lands across the Kenya — Tanzania border. The society has a barracks-like institution called the Murran system where male youths are formally trained in preparation for community life. The study was conducted among the Maasai of Narok District, Kenya. Being a qualitative study, its data was collected through respondent intervi...
BACKGROUND Antioxidant and anti-inflammatory properties of honey have been largely recognized by various studies. Almost all of the potential benefits are associated with polyphenol content. Honey varieties from the arid region are reported to be rich in polyphenols, but data related to its bioactivity in vitro is greatly lacking. This study aimed at establishing the antioxidant and anti-inflam...
This paper reviews the predictions and management implications of two current paradigms in the ecology and management of arid and semi-arid rangelands. The equilibrium model stresses the importance of biotic feedbacks such as density-dependent regulation of livestock populations and the feedback of livestock density on vegetation composition, cover and productivity. Range management under this ...
Climate change is generally predicted to increase net primary production, which could lead to additional C input to soil. In arid central Asia, precipitation has increased and is predicted to increase further. To assess the combined effects of these changes on soil CO2 efflux in arid land, a two factorial manipulation experiment in the shrubland of an arid region in northwest China was conducte...
Desertification is the degradation of land in arid and semi-arid areas. Nowadays, lack of water and desertification are extreme problems for plant survival and growth in the arid and semi-arid areas of the world. It becomes increasingly important as to how to let the plant absorb moisture more effectively for keeping growth strong. We synthesized superabsorbent polymers (SAPs) with carbohydrate...
Desigii considerations arc presented for rarlgefiilders wliiclii ernploy active triaiigulatinri. Tlie geometric tradeoffs for coiiveritiorial triangulation gcoirietries are identified, aiid the way i n wliicli tliesc can be iiiiiiirnised using a synchronized scaiiiiiiig approach is dcscribed. We compare the perfurlrialice of the cliargecoupled device (CCD) and lateral-effect pliotocliode (LEP) ...
Most severe forms of intellectual disability (ID) have specific genetic causes. Numerous X chromosome gene defects and disease-causing copy-number variants have been linked to ID and related disorders, and recent studies have revealed that sporadic cases are often due to dominant de novo mutations with low recurrence risk. For autosomal recessive ID (ARID) the recurrence risk is high and, in po...
The present study examines empirically the relationship betuieen sex and internal-external expectancy. It also studies the differences in the level of performance between internally and externally oriented male and female library employees. The results of inter-correlation suggest sex as a significant correlate of locus of control. Bivariate analysis reveals significant difference in the level ...
6 Agricultural sustainability practices make the best use 7 of both nature’s resources and available technology, 8 and generally avoid those land use practices that lead 9 to greater environmental stress. There are examples in 10 some agro-ecosystems, however, where stress is vital 11 to food quality and productivity. In the case of grape 12 production, a limited amount of environmental stress ...
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