نتایج جستجو برای: irrigated agricultures

تعداد نتایج: 9287  

2014
Jens Schirmel Martin Alt Isabell Rudolph Martin H. Entling Judi Hewitt

Lowland meadow irrigation used to be widespread in Central Europe, but has largely been abandoned during the 20th century. As a result of agri-environment schemes and nature conservation efforts, meadow irrigation is now being re-established in some European regions. In the absence of natural flood events, irrigation is expected to favour fauna typical of lowland wet meadows. We analysed the ef...

2007
MUHAMMAD MAQSOOD AZAM ALI

Finger millet landraces viz., TZA-01 and TZM-01 were grown in glasshouses under two moisture regimes (fully irrigated and after drought) to investigate the effects of environmental stress on the growth, SPAD measurement, radiation use efficiency and yield of finger millet (Eleucine coracana). The drought treatment was imposed at 28 DAS beyond which no irrigation was applied to the droughted tre...

2010
Steve Wiggins Henri Leturque

Steve Wiggins is an agricultural economist and Henri Leturque is a biologist and rural development specialist, respectively research fellow and research officer at the Overseas Development Institute, London. Both have lived and worked in Africa. About the report This report is based upon the published literature, complemented by canvassing the opinions, through telephone and interview, of a cro...

2008
Todd D. Davis

The commodity markets have been bidding for acreage due to increased corn and soybean demand for biofuels. Currently, the major decision facing producers is determining the enterprise mix for 2008 in the midst of higher commodity prices. This memo compares the Return over Variable Costs for soybeans and peanuts and analyzes the break-even yields and prices for non-irrigated and irrigated produc...

2014
Neerja Puri Ashutosh Talwar

Address for correspondence* DR NEERJA PURI House no 626, phase ii,urban estate, dugri road, ludhiana. Punjab. [ India] Email id: neerjaashu @ rediffmail.com The results were tabulated and the data was analysed statistically using chi square test. It was found that maximum [40%] percentage of patient was between 31 – 40 years of age, followed by 30% patients between 21-30 years, 20% patients bet...

2008
Todd D. Davis

The commodity markets have been bidding for acreage due to biofuels creating increased demand for corn and soybeans. Currently, the major decision facing producers is determining the enterprise mix for 2008 in the midst of higher commodity prices. This memo compares the Return over Variable Costs for cotton and peanuts and analyzes the breakeven yields and prices for non-irrigated and irrigated...

2012
Philipp Dalkmann Melanie Broszat Christina Siebe Elisha Willaschek Tuerkan Sakinc Johannes Huebner Wulf Amelung Elisabeth Grohmann Jan Siemens

Irrigation with wastewater releases pharmaceuticals, pathogenic bacteria, and resistance genes, but little is known about the accumulation of these contaminants in the environment when wastewater is applied for decades. We sampled a chronosequence of soils that were variously irrigated with wastewater from zero up to 100 years in the Mezquital Valley, Mexico, and investigated the accumulation o...

Journal: :Remote Sensing 2016
Ning Jin Bo Tao Wei Ren Meichen Feng Rui Sun Liang He Wei Zhuang Qiang Yu

Irrigation is crucial to agriculture in arid and semi-arid areas and significantly contributes to crop development, food diversity and the sustainability of agro-ecosystems. For a specific crop, the separation of its irrigated and rainfed areas is difficult, because their phenology is similar and therefore less distinguishable, especially when there are phenology shifts due to various factors, ...

2015
S. Siebert M. Kummu M. Porkka P. Döll N. Ramankutty B. R. Scanlon

Irrigation intensifies land use by increasing crop yield but also impacts water resources. It affects water and energy balances and consequently the microclimate in irrigated regions. Therefore, knowledge of the extent of irrigated land is important for hydrological and crop modelling, global change research, and assessments of resource use and management. Information on the historical evolutio...

Journal: :Journal of environmental quality 2003
Roy F Spalding Darrell G Watts Daniel D Snow David A Cassada Mary E Exner James S Schepers

Better management practices can counter deterioration of ground water quality. From 1991 through 1996 the influence of improved irrigation practices on ground water pesticide contamination was assessed at the Nebraska Management Systems Evaluation Area. Three 13.4-ha corn (Zea mays L.) fields were studied: a conventional furrow-irrigated field, a surge-irrigated field and a center pivot-irrigat...

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