نتایج جستجو برای: agricultural drought

تعداد نتایج: 130420  

2011
Dejene K. Mengistu

Climate change adversely affects Ethiopian economy due to heavy dependence of the agricultural sector on rainfall. A decrease of rainfall and rise in temperature has been increasing the exposure of the country to frequent drought. The study was conducted in central Tigray, Adiha tabia, to examine the perception of farmers on trends of climate changes and existing coping strategies. Farmers’ kno...

2008
P. K. KIMURTO M. G. KINYUA J. M. NJOROGE

Selection of drought tolerant wheat genotypes for Arid and Semi-arid lands (ASALS) of Kenya, which consist of 83% of total land area, can provide alternative agricultural land for expansion. To reduce cost of dryland research, simulated drought under a rain shelter offers a good alternative for screening because marginal areas are vast and widespread. Four moisture regimes which simulated termi...

2016
Ram Sewak Singh Tomar Sushma Tiwari Vinod Bhojaraja K. Naik Suresh Chand Rupesh Deshmukh Niharika Mallick Sanjay Singh Nagendra Kumar Singh S. M. S. Tomar

Water availability is a major limiting factor for wheat (Triticum aestivum L.) production in rain-fed agricultural systems worldwide. Root architecture is important for water and nutrition acquisition for all crops, including wheat. A set of 158 diverse wheat genotypes of Australian (72) and Indian (86) origin were studied for morpho-agronomical traits in field under irrigated and drought stres...

2017
He Song Yibo Li Li Zhou Zhenzhu Xu Guangsheng Zhou

10 Effects of crop growth and physiological activity to drought and irrigation regimes 11 have been extensively studied; however, the responses of plant growth, morphological 12 and photosynthetic behaviors to drought episodes and thereafter rewatering receive a 13 less attention. This field experiment was carried out directly in situ at an agricultural 14 ecosystem research station during 2015...

Journal: :journal of agricultural science and technology 2014
a. r. koocheki a. yazdansepas u. mahmadyorov m. r. mehrvar

drought is the most restricting factor in agricultural production in arid and semi-arid regions. this research was conducted on 19 facultative and winter wheat genotypes grown under normal irrigation (n), early post-anthesis (s1), and late post-anthesis (s2) drought stress conditions. the experiments were conducted at karadj, arak, and jolgehrokh agricultural research stations in iran, during 2...

2010
MUHAMMAD HAMAYUN EUN-YOUNG SOHN SUMERA AFZAL KHAN ZABTA KHAN SHINWARI ABDUL LATIF KHAN IN-JUNG LEE

Agricultural industry is subjected to enormous environmental constraints, particularly due to salinity and drought. We evaluated the role of silicon (Si) in alleviating salinity and drought induced physio-hormonal changes in soybean grown in perlite. The plant growth attributes i.e., shoot length, plant fresh weight and dry weight parameters of soybean improved with elevated Si nutrition, while...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2015
Colin P Kelley Shahrzad Mohtadi Mark A Cane Richard Seager Yochanan Kushnir

Before the Syrian uprising that began in 2011, the greater Fertile Crescent experienced the most severe drought in the instrumental record. For Syria, a country marked by poor governance and unsustainable agricultural and environmental policies, the drought had a catalytic effect, contributing to political unrest. We show that the recent decrease in Syrian precipitation is a combination of natu...

The drought caused a series of effects on many sectors of economy, especially natural resources. During two last decades, Iran has suffered from several severe to extreme agricultural droughts which caused significant decreases in rangeland and agriculture yields. This paper discusses the detection of agricultural drought severity over the rangelands of Markazi Province between 2000 and 2014 us...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید