نتایج جستجو برای: rain fed

تعداد نتایج: 101824  

2003
John Rockström Jennie Barron Patrick Fox

Considering the persistently growing pressure on finite freshwater and soil resources, it becomes increasingly clear that the challenge of feeding tomorrow’s world population is, to a large extent, about improved water productivity within present land use. Rain-fed agriculture plays a critical role in this respect. Eighty per cent of the agricultural land worldwide is under rain-fed agriculture...

Journal: :The American journal of tropical medicine and hygiene 2012
Svilena Ivanova Vincent Herbreteau Kim Blasdell Yannick Chaval Philippe Buchy Bertrand Guillard Serge Morand

We investigated infection of rodents and shrews by Leptospira spp. in two localities of Cambodia (Veal Renh, Kaev Seima) and in four types of habitat (forests, non-flooded lands, lowland rain-fed paddy fields, houses) during the wet and the dry seasons. Habitat preference was common, and rodent and shrew species were found only in houses or in rain-fed paddy fields or in forests. Among 649 smal...

2017
Andreas Reim Marcela Hernández Melanie Klose Amnat Chidthaisong Monthira Yuttitham Ralf Conrad

Rice paddies in central Thailand are flooded either by irrigation (irrigated rice) or by rain (rain-fed rice). The paddy soils and their microbial communities thus experience permanent or arbitrary submergence, respectively. Since methane production depends on anaerobic conditions, we hypothesized that structure and function of the methanogenic microbial communities are different in irrigated a...

A. R. Sepaskhah A.A. Kamgar-Haghighi M. Abdolahipour S. Zand-Parsa T. Honar

Supplemental irrigation under prolonged drought conditions has a key role in providing water for transpiration of rain-fed fig trees. The effect of different times and amounts of supplemental irrigation at different distances from the tree trunk on quantity and quality of Estahban rain-fed fig production was evaluated during two years. A randomized complete block design with four replications o...

2012
Sondeep Singh Anil K. Gupta Narinder Kaur

The present study in a two-year experiment investigated the influence of drought and sowing time on protein composition, antinutrients, and mineral contents of wheat whole meal of two genotypes differing in their water requirements. Different thermal conditions prevailing during the grain filling period under different sowing time generated a large effect on the amount of total soluble proteins...

Journal: :جغرافیا و توسعه ناحیه ای 0
حسن عینی سلیمان صادقی سید رضا حسین زاده

the dominant agricultural land uses are included of wheat farming in the kermanshah providence in the northwest of iran. the objective of this paper is analyzing of topoclimatic zonning of the wheat dry farming areas based on overlying the climatic and topographic character tics. to achieve the exact date of stages of rain-fed wheat growing in different areas of the province, the degree-days te...

حیدری, سعید, اقبالی, داریوش , دیرکوندی, سمیه , زیدی طولابی, نورا..., عزیزی, خسرو ,

In order to study effect of plant density on yield and seed yield components of forage vetch in rain-fed and supplemental irrigation conditions, two separate experiments were conducted at the research filed of faculty of agriculture, Lorestsn University, during 2008-2009. Three species of forage vetch (Vicia narbonensis, V. sativa and V. dasycarpa) and in three plant densities (100, 150 and 20...

Study of empowerment and feasibility of different regions’ economy and its trend is an effective step for regional planning and resource allocation. This research tries to investigate different economic activities in order to determine investment opportunities in Ardabil Province. For ranking of economic activities a mix method of factor analysis and numeric taxonomy together with absolute adv...

Journal: :تحقیقات اقتصاد و توسعه کشاورزی ایران 0
سعید یزدانی استاد دانشکده اقتصاد و توسعه کشاورزی ، پردیس کشاورزی و منابع طبیعی ، دانشگاه تهران عذرا زاهدپور یگانه کارشناس ارشد پردیس کشاورزی و منابع طبیعی، دانشگاه تهران

awardness about structure of production technology and its characteristics is a usefull tool for planning in agricultural sector. in this regard, this study aims to determine some effective parameters of structure of production technology in rain fed barley production. before estimating these parameters, we examine the aggregation consistency condition for barley fields using the mean scaling t...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2007
Johan Rockström Mats Lannerstad Malin Falkenmark

This article analyzes the water implications in 92 developing countries of first attaining the 2015 hunger target of the United Nations Millennium Development Goals and then feeding a growing population on an acceptable standard diet. The water requirements in terms of vapor flows are quantified, potential water sources are identified, and impacts on agricultural land expansion and water tradeo...

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