نتایج جستجو برای: cultivated area of all irrigated crops decrease and rainfed crops rainfed wheat

تعداد نتایج: 24102885  

Ahmed M. Abdel Rahman Mohamed E. Hamid

Climate change represents the major challenge to Sudan agricultural production, economics and food security. Changes in temperature, rainfalls, water availability, increased outbreak of pest and diseases, land degradation, soil erosion, shrinking of grazing and cultivate areas, ongoing desertification and the other aspects of climate change have direct significant impact on agricultural product...

2006
MJ PARSONS

without any scientific basis. About 20 years ago, researchers In response to requests by small scale cane growers of KwaZulu-Natal for advice on i~nproving their system of crop production, a Joint Project between SASEX and the KwaZulu-Natal Department of Agricul~ure was started in 1996. Trials were initiated to investigate the practicalitics of intercropping rainfed and irrigated cane with food...

Journal: :Journal of experimental botany 2004
Neil C Turner

Yields of dryland (rainfed) wheat in Australia have increased steadily over the past century despite rainfall being unchanged, indicating that the rainfall-use efficiency has increased. Analyses suggest that at least half of the increase in rainfall-use efficiency can be attributed to improved agronomic management. Various methods of analysing the factors influencing dryland yields and rainfall...

2009
K. N. Chaudhari M. P. Oza

The regional models of yield response to temperature (minimum, maximum and its diurnal range) and precipitation developed for meteorological (met) sub-divisions of India were used to study the impact of future climate change on major food crops viz. wheat, rice, potato and rapeseed-mustard. The area weighted averages of district-wise crop yield data were computed at met sub-division level for 1...

1999

The analysis of carbon isotope discrimination (∆) in crop plant remains from archaeological sites may help to assess water availability for early agriculture. This study presents the analysis of ∆ in seeds of naked wheat (Triticum aestivum/durum), lentil (Lens orientalis/ culinaris), and flax (Linum sp.) found at the archaeological site of Tell Halula in the valley of the Middle Euphrates (Syri...

Journal: :Journal of Natural Resources and Development 2011

Journal: :Agronomy 2022

Interspecific interactions and recovery growth play an important role in crop growth, development ultimately yield intercropping systems. However, the impact of different water nitrogen levels on production, interspecific between intercrops, late-maturing crops is still unclear. A two-year field experiment was conducted Yangling, Shaanxi province, to investigate dynamics interactions, effects y...

Dingrong Wu Enli Wang Huib Hengsdijk Qiang Yu,

Summer maize (Zea mays L.) is one of the dominant crops in the North China Plain (NCP). Its growth is greatly influenced by the spatial-temporal variation of climatic variables, especially solar radiation, temperature and rainfall. The WOFOST (version 7.1) model was applied to evaluate the impact of climatic variability on summer maize yields using historical meteorological data from 1961 to 20...

Journal: :international journal of advanced biological and biomedical research 2013
ezatollah farshadfar elham mahtabi mohammad mahdi jowkar

chickpea (cicer arietinum l.) is one of the most important crops worldwide that is a subject of many plant breeding programs in many countries. in addition, climates are changing all over the world and drought becomes one of the most serious problems versus yield of crops. in order to screen drought tolerant genotype in chickpea, twenty genotypes were tested under rainfed and irrigated conditio...

2015
Tejendra Chapagain Allen Good

Improving crop yields are essential to meet the increasing pressure of global food demands. The loss of high quality land, the slowing in annual yield increases of major cereals, increasing fertilizer use, and the effect of this on the environment all indicate that we need to develop new strategies to increase grain yields with less impact on the environment. One strategy that could help addres...

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