搜索结果: 1-15 共查到“semiarid”相关记录23条 . 查询时间(0.046 秒)
Detection of the effects of management and physical factors on forest soil carbon stock variability in semiarid conditions using parametric and nonparametric methods
soil organic carbon CART modelling, neural networks
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2015/11/26
Forest soils in western parts of Iran are being degraded by inappropriate management. The soil organic carbon (SOC) stock was dominantly affected by this type of degradation. On the other hand, SOC is...
Combined use of SAR and optical data for environmental assessments around refugee camps in semiarid landscapes
SAR refugee camps landscape capacity
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2015/5/7
Over 15 million people were officially considered as refugees in the year 2012 and another 28 million as internally displaced people (IDPs). Natural disasters, climatic and environmental changes, vi...
Variation in nitrogen economy of two Stipa species in the semiarid region of northern China
Habitat preference Mean residence time Nitrogen-use efficiency Nitrogen productivity Plant strategies
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2015/2/5
How effectively plants utilize nitrogen (N), the most limiting nutrient in natural ecosystems, will largely determine the success of plants in intra- and inter-specific competition. Theory suggests th...
Grassland fire effect on soil organic carbon reservoirs in a semiarid environment
effect on soil organic carbon emiarid environment
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2015/1/5
The aim of this work was to investigate the effect of an experimental fire used for grassland management
on soil organic carbon (SOC) stocks. The study was carried
out on Hyparrhenia hirta (L....
Evapotranspiration and water-use efficiency of irrigated colored cotton cultivar in semiarid regions
Bowen Ratio Crop Evapotranspiration Irrigation Treatments Seed-Cotton Yield
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2013/3/4
Irrigation studies provide a framework for evaluating agricultural production and the water resource management in locations where water is scarce. Field experiments were conducted at Barbalha- CE (no...
Water Scarcity and Birth Outcomes in the Brazilian Semiarid
water rainfall health birth infant mortality sanitation semiarid Brazil
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2012/10/23
This paper analyzes the impact of rainfall fluctuations during the gestational period on health at birth. We concentrate on the semiarid region of Northeastern Brazil to highlight the role of water sc...
Cropping frequency and N fertilizer effects on soil water distribution from spring to fall in the semiarid Canadian prairies
Fallow Frequency Water Use Plant Biomass Spring Wheat Soil Water
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2013/3/4
In the semiarid Canadian prairies, water is the most limiting and nitrogen (N) the second most limiting factor influencing spring wheat (Triticum aestivum L.) production. The efficiency of water-and n...
Trace Elements Distribution in Red Soils under Semiarid Mediterranean Environment
Trace Elements Castilla-La Mancha Region Red Soils Soil Geochemistry
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2013/3/6
This study states the potential trace elements (TE’s) content of red soils located at the centre region of Spain, characterized by low rainfall and slight acidity over prolonged weathering periods. Fo...
Physico-chemical characteristics and clay mineralogy composition of selected soils in arid and semiarid regions of Iran
Physico-chemical characteristics clay mineralogy composition Iran
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2011/11/10
Knowledge of soil types and their properties is highly important in determining constraints and potential as well as better utilization of soils. Clay minerals are important fractions of the soil soli...
Effect of Cultivation on Some Soil Attributes of a Long-term Pastoral Land in the Semiarid Tropics of Sudan
Management degradation grazing and soil properties
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2010/11/15
Cultivation may have various effects on soil properties and could therefore be a useful guide
of soil quality indices. This study was conducted to determine the effects of more than 20 years cultivat...
ANALYSIS OF DEPTH-AREA-DURATION CURVES OF RAINFALL IN SEMIARID AND ARID REGIONS USING GEOSTATISTICAL METHODS: SIRJAN KAFEH NAMAK WATERSHED, IRAN
DEPTH-AREA-DURATION CURVES SEMIARID AND ARID REGIONS RAINFALL Isohyet maps
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2009/10/12
Isohyet maps are were prepared after collection of data and information at 59 rainfall gauging stations in the Sirjan Kafeh Namak Watershed, Iran, and the dominant and maximum rainfall for durations o...
Usability of the Taurus Cedar and Crimean Pine in green belt afforestations in semiarid regions in Turkey: A case study in Konya Province Loros Mountain -Akyokus
Crimean Pine green belt afforestation height root collar diameter Taurus cedar
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2010/9/13
In this study, root collar diameter and height development of 9 year-old saplings of Taurus Cedar (Cedrus libani) and Crimean Pine (Pinus nigra subsp. nigra var. caramanica) in the green belt afforest...
Pearl Millet Developed Deep Roots and Changed Water Sources by Competition with Intercropped Cowpea in the Semiarid Environment of Northern Namibia
Heavy water Leaf water potential Rooting pattern Stable isotope Water stress Water uptake
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2009/7/24
The practice of intercropping pearl millet with cowpea is widespread among subsistence farmers in northern Namibia. In this region, the scarce and erratic rainfall may enhance competition for the limi...
Semiarid watershed response in central New Mexico and its sensitivity to climate variability and change
Hydrologic processes temperature precipitation characteristics
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2009/7/22
Hydrologic processes in the semiarid regions of the Southwest United States are considered to be highly susceptible to variations in temperature and precipitation characteristics due to the effects of...
A conceptual dynamic vegetation-soil model for arid and semiarid zones
vegetation-soil model semiarid zones arid
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2009/5/6
Plant ecosystems in arid and semiarid climates show high complexity, since they depend on water availability to carry out their vital processes. In these climates, water stress is the main factor cont...