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1
Desert Development: Desert agriculture, ecology, and biology
This book focuses on the socio-economic aspects of desert communities such as balancing economic and ecological issues, new and renewable energy strategies and nonconventional energy plans.
Adli Bishay, Harold E. Dregne, 1991
2
Desertification of Arid Lands
First Published in 1983. Routledge is an imprint of Taylor & Francis, an informa company.
3
Handbook of Agricultural Economics - Том 3 - Сторінка 2918
Dregne (1988, p. 679) noted that estimates of land degradation, including his own, were based on “...little data and much informed opinion”. Writing specifically of soil erosion and its productivity effects, Dregne (1988, p. 680) asserted that ...
Bruce L. Gardner, Robert Eugene Evenson, Gordon C. Rausser, 2007
4
The Threatening Desert: Controlling desertification
The potential valueofagricultural production lost every year in the late1970swasestimated at more than$26 billion (Table4.6; Dregne 1983a). Therateofdesertification of202,460 sqkmper annum compareswith an estimated rate of clearance of ...
5
Land Quality, Agricultural Productivity, and Food ... - Сторінка 38
Dregne and Chou, and Oldeman et al. It was not until the early 1990s that new data became available that for the first time provided a reasonably strong basis for global estimates of the extent of soil erosion and the severity of its effects on crop ...
6
Population and Food in the Early Twenty-first Century: ... - Сторінка 152
The other post-Nelson (1988) study of global land degradation is by Dregne and Chou (1992). The study was subsequently amended by Dregne (1993) but without major changes. Dregne and Chou estimated the amount of degraded land in ...
7
Arid Land Ecosystems: Volume 1: Structure, Functioning and ...
Brown, G. W. (ed.)(1974). Desert Biology, Volume ii. Academic Press, New York. Cloudsley-Thompson, J. L. (1970). Animal utilization. In: Dregne( 1970), pp. 57-72. Dregne, H. E. (1968). Surface materials of desert environments. In: McGinnies ...
R. A. Perry, D. W. Goodall, 1979
8
Soil Erosion and Dryland Farming - Сторінка 241
Crosson (1995, 1996) also computed global loss in productivity by using soil degradation data of Dregne and Chou (1992) and Oldeman (1994). Crosson assumed that slightly, moderately, and strongly degraded soils had lost 5%, 18%, and ...
Junliang Tian, Chi-Hua Huang, 2000
9
Integrated Watershed Management in the Global Ecosystem
Dregne and Chou classified rain-fed and irrigated cropland as slightly degraded (0 to 10% loss of productivity), moderately degraded (10 to 25% loss), severely degraded (25 to 50% loss), and very severely degraded (more than 50% loss).
10
Developments in Soil Classification, Land Use Planning and ...
When the problems of soils erosion come to drylands, the methodologies and data are even less accurate, and we have to rely on the studies conducted almost 30 years ago by Harold Dregne, who has designed the methodology to assess ...
Shabbir A. Shahid, Faisal K. Taha, Mahmoud A. Abdelfattah, 2013
