نتایج جستجو برای: crop production

تعداد نتایج: 652923  

2012
Gomatee Singh

The adoption of cropping pattern in any region is an outcome of varied factors, which plays important role i.e. physical, social and economic factors. Some of these are changeable like prices, government policies, technology etc. and have operated very variously at different times. These factors have a combined impact on the decision making process of the farmer. Those which are not subject to ...

2018
Confidence Duku Sander J Zwart Lars Hein

In recent decades, there have been substantial increases in crop production in sub-Saharan Africa (SSA) as a result of higher yields, increased cropping intensity, expansion of irrigated cropping systems, and rainfed cropland expansion. Yet, to date much of the research focus of the impact of climate change on crop production in the coming decades has been on crop yield responses. In this study...

2007
D. T. Westerman S. E. Crothers

The N available after legumes is sufficient for maximum crop yields in many cropping systems. Fertilizing without accounting for the "extra" N mineralized from legume residues can contribute to high nitrate-N concentrations in the soil during crop production and increase nitrate-N leaching potential. Tillage practices also affect the physical, biological, and chemical nature of the soil, changi...

2008
Nicole L Shaw Daniel J. Cantliffe

The Florida vegetable industry relies heavily on plasticulture technologies from the transplant nursery through the packing house and market chain. The value of the Florida vegetable industry has consistently risen while the acreage has declined for many commodities. The use of greenhouse technologies for high-valued crops is an alternative method of crop production that would compliment the cu...

2017
Shah Fahad Ali A. Bajwa Usman Nazir Shakeel A. Anjum Ayesha Farooq Ali Zohaib Sehrish Sadia Wajid Nasim Steve Adkins Shah Saud Muhammad Z. Ihsan Hesham Alharby Chao Wu Depeng Wang Jianliang Huang

Abiotic stresses are one of the major constraints to crop production and food security worldwide. The situation has aggravated due to the drastic and rapid changes in global climate. Heat and drought are undoubtedly the two most important stresses having huge impact on growth and productivity of the crops. It is very important to understand the physiological, biochemical, and ecological interve...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2004
Shaobing Peng Jianliang Huang John E Sheehy Rebecca C Laza Romeo M Visperas Xuhua Zhong Grace S Centeno Gurdev S Khush Kenneth G Cassman

The impact of projected global warming on crop yields has been evaluated by indirect methods using simulation models. Direct studies on the effects of observed climate change on crop growth and yield could provide more accurate information for assessing the impact of climate change on crop production. We analyzed weather data at the International Rice Research Institute Farm from 1979 to 2003 t...

2013
Sheetal Sekhri Kritika Saxena

Groundwater depletion is becoming a serious policy concern in many developing countries but little is known about the costs of groundwater depletion. I use annual deviations of depth to groundwater from 1999 to 2003 from the 1985-1995 decadal means for Indian districts, to investigate how production and sown area respond to groundwater fluctuations. I find that a 1 meter decline in groundwater ...

2018
A. E. Johnston P. R. Poulton

Long-term field experiments that test a range of treatments and are intended to assess the sustainability of crop production, and thus food security, must be managed actively to identify any treatment that is failing to maintain or increase yields. Once identified, carefully considered changes can be made to the treatment or management, and if they are successful yields will change. If suitable...

2011
L. Randall

Operational remote sensing systems are currently being used to monitor crop growth and climate to map impacts on crop production. The linking of these data to traditional crop forecasting systems has the capacity to improve both the spatial and temporal resolution of crop forecasts.

2013
Junguo Liu Christian Folberth Hong Yang Johan Röckström Karim Abbaspour Alexander J. B. Zehnder

Food security and water scarcity have become two major concerns for future human's sustainable development, particularly in the context of climate change. Here we present a comprehensive assessment of climate change impacts on the production and water use of major cereal crops on a global scale with a spatial resolution of 30 arc-minutes for the 2030s (short term) and the 2090s (long term), res...

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