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Population and rangelands in central Tibet : a GIS-based approach
The study focuses on the meso-regional pattern of rangeland ecotypes in relation to population density. Data on rangelands derive from a recent land-cover GIS database of China based on the 1:1 000 000 Land Use Map of China. The methodology offers
a finer geographic resolution than in all other available research reports. Systemic land cover patterns are mapped, and reveal the importance of local interactions between population and rangeland ecotypes.

Productivity of eroded rangelands on the Njemps Flats
Factors limiting productivity of overgrazed, semi-arid rangelands on the Njemps Flats, Kenya were investigated, conducting fertilization and irrigation experiments. Productivity was evaluated in terms of yield, vegetation quality and soil chemical

Characteristics of concentrated flow hydraulics for rangeland ecosystems : implications for hydrologic modeling
This study investigates the hydraulics of concentrated flow using unconfined field experimental data over diverse rangeland landscapes within the Great Basin Region, United States. The results imply that the overall hydraulics of concentrated flow
on rangelands differ significantly from those of cropland rills. Concentrated flow hydraulics on rangelands are largely controlled by the amount of cover or bare soil and hillslope angle. New predictive equations for concentrated flow velocity representing
a diverse set of rangeland environments were developed. The resulting equations are applicable across a wide span of ecological sites, soils, slopes, and vegetation and ground cover conditions and can be used by physically-based rangeland hydrology
and erosion models to estimate rangeland concentrated flow hydraulic parameters.

The assessment and monitoring of sparsely vegetated rangelands using Calibrated Landsat data

Field soil aggregate stability kit for soil quality and rangeland health evaluations
Soil aggregate stability is widely recognized as a key indicator of soil quality and rangeland health. A stability kit is described which can be inexpensively and easily assembled with minimal tools. It permits up to 18 samples to be evaluated

Typologie des communautés d'oiseaux des alpages et cartographie écologique. (Typology and ecological mapping of bird communities in alpine rangelands)
During the years 1973-1976, 256 point counts for censusing Passerine communities have been performed in alpine rangelands of the Briançonnais (Hautes-Alpes, France). Numerical results have been processed through classification and factor analysis

Effects of aeolian processes on water infiltration in sandy Sahelian rangeland in Burkina Faso
crusts. These results could have significant impacts for better understanding of rangeland sandy soil in semi-arid areas.

A framework relating soil surface condition to infiltration and sediment and nutrient mobilization in grazed rangelands of northeastern Queensland, Australia
of the more widely distributed rangeland soils in northeastern Queensland. A simple soil surface condition classification scheme relates ground cover and a few easily recognizable surface features to mean infiltration, sediment and nutrient concentration data

The effects of fire on the surface properties and seed germination in two shallow monoliths from a rangeland soil subjected to simulated raindrop impact and water erosion

Modeling soil erosion on steep sagebrush rangeland before and after prescribed fire

Thorns paired, sharply recurved: cultural controls and rangeland quality in East Africa in Desertification and development: dryland ecology in social perspective.

Résultats de la recherche (71 résultats)