نتایج جستجو برای: dryland

تعداد نتایج: 2338  

Land use change as the most important destructive factor in natural ecosystems is a globally problem that changes soil properties. Therefore, correct management and recognition of change aspects on each component of the ecosystem is necessary. This process causes land destruction, ecosystem instability, soil erosion, and more biological threats. Due to increasing land use conversion from rangel...

2013
Mohankumar H Kapanigowda Ramasamy Perumal Maduraimuthu Djanaguiraman Robert M Aiken Tesfaye Tesso PV Vara Prasad Christopher R Little

Sorghum [Sorghum bicolor (L.) Moench] grain yield is severely affected by abiotic and biotic stresses during post-flowering stages, which has been aggravated by climate change. New parental lines having genes for various biotic and abiotic stress tolerances have the potential to mitigate this negative effect. Field studies were conducted under irrigated and dryland conditions with 128 exotic ge...

2017
D. Mark Powell

Dryland alluvial rivers vary considerably in character. In terms of processes, high energy, sediment-laden flash floods in upland rivers contrast dramatically with the low sediment loads and languid flows of their lowland counterparts while from a form perspective, the unstable wide, shallow and sandy braid plains of piedmont rivers are quite different from the relatively stable, narrow, deep a...

2016
Glenn Hyman Elizabeth Barona Chandrashekhar Biradar Edward Guevara John Dixon Steve Beebe Silvia Elena Castano Tunrayo Alabi Murali Krishna Gumma Shoba Sivasankar Ovidio Rivera Herlin Espinosa Jorge Cardona Liangzhi You Jeffrey D. Ehlers

Dryland cereals and legumes  are important crops in farming systems across the world.  Yet they are frequently neglected among the priorities for international agricultural research and development, often due to lack of information on their magnitude and extent. Given what we know about the global distribution of dryland cereals and legumes, what regions should be high priority for research and...

2004
Demel Teketay

Dryland forest resources have great socio-economic and ecological importance in countries of SSA by playing significant roles in livelihood diversification of both rural and urban households, wood and food security, providing animal feed, human health care and environmental conservation. Despite their great importance, these resources have been subjected to severe degradation, owing to several ...

A.A. Kamgar-Haghighi D. Khalili F. Razzaghi, M. Nazari S.M. Tahami Zarandi

Clustering was used to divide dryland farming areas in western Iran into homogeneoussub-regions to identify dryland farming potential, considering drought impacts. Clusteringutilized eight algorithms/four indices to detect optimal number of clusters. Ward’s algorithmvalidated by Silhouette index, produced the best result by detecting 7 dryland farming clusters.Based on similar P/ETo values, fou...

2017
Tabitha T. Brown Carrie M. Lee Chad E. Kruger John P. Reganold David R. Huggins

Citation: Brown TT, Lee CM, Kruger CE, Reganold JP and Huggins DR (2017) Comparison of Greenhouse Gas Offset Quantification Protocols for Nitrogen Management in Dryland Wheat Cropping Systems of the Pacific Northwest. Front. Environ. Sci. 5:72. doi: 10.3389/fenvs.2017.00072 Comparison of Greenhouse Gas Offset Quantification Protocols for Nitrogen Management in Dryland Wheat Cropping Systems of ...

2018
Sanford D. Eigenbrode W. Patrick Binns David R. Huggins

Citation: Eigenbrode SD, Binns WP and Huggins DR (2018) Confronting Climate Change Challenges to Dryland Cereal Production: A Call for Collaborative, Transdisciplinary Research, and Producer Engagement. Front. Ecol. Evol. 5:164. doi: 10.3389/fevo.2017.00164 Confronting Climate Change Challenges to Dryland Cereal Production: A Call for Collaborative, Transdisciplinary Research, and Producer Enga...

Journal: :OR Insight 2011
Narges Banaeian Morteza Zangeneh

Wheat is widely grown in Iran as a staple food; therefore, the government there encourages farmers to produce wheat (a common agricultural enterprise) by increasing farm productivity and efficiency. The study compares the efficiency of wheat production for dryland (low input) and irrigated (high input) systems across Iranian provinces by using Data Envelopment Analysis (DEA). The average techni...

2009
R VAN ANTWERPEN

In many crop producing areas of the world there are reports of yield decline and loss of productive potential in soils. Little is known about the long term effects of sugarcane monocropping on changes in physical, chemical and biological properties of soils. The aim of this study was to quantify the physical and chemical condition of soils under sugarcane production in northern Kwazulu-Natal, a...

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