Zobrazeno 1 - 10
of 57
pro vyhledávání: '"F.W.T Penning de Vries"'
Autor:
Pay Drechsel, F.W.T. Penning de Vries
Soil nutrient depletion and other forms of soil degradation threaten future soil productivity, especially in sub-Saharan Africa (SSA). Even under optimistic assumptions, data from SSA show that 8–12 years of fallow are needed to replenish the nitro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4aab350789c5da9eab2e8fd86bd5577d
https://doi.org/10.1201/9780429187957-8
https://doi.org/10.1201/9780429187957-8
Publikováno v:
Agricultural Systems. 73:313-324
Red soils cover 21% of China's surface: some 2.10 6 km 2 . Much of the area is hilly. Rice grows mainly in the lowlands. Only a fraction of the uplands in the red soil area is cropped, but yields are low due to inadequate topsoil as a result of erosi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7d4cc5ef8fd1772870d0d5919ccd4dc4
https://doi.org/10.1016/s0308-521x(01)00093-2
https://doi.org/10.1016/s0308-521x(01)00093-2
Agriculture is changing rapidly all over the world. Intensification, diversification, optimizing scarce resources, integrated pest management, sustainability and climate change are key issues for agricultural institutes. The best solutions will be fo
Publikováno v:
Nutrient Cycling in Agroecosystems. 50:181-189
The world population is expected to grow to 10 billion people in 2040, requiring food production at least to triple, as a combined result of population growth and dietary changes. In this study scenarios for food security are developed for 15 major r
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c4d007b62c35a2b72e141d2a160f85c3
https://doi.org/10.1023/a:1009788211315
https://doi.org/10.1023/a:1009788211315
Autor:
F.W.T. Penning de Vries
Publikováno v:
China Information. 10:203-207
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c2cdfe4de7be5ab716042b0b7356c467
https://doi.org/10.1177/0920203x9501000326
https://doi.org/10.1177/0920203x9501000326
Publikováno v:
Agricultural Systems, 47, 1-24
Agricultural Systems 47 (1995)
Agricultural Systems 47 (1995)
Percolation ponds are constructed in many parts of the tropics to augment fast-depleting groundwater resources. Increased agricultural productivity due to additional well irrigation water is the direct benefit from the pond schemes. Usually, location
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f8909a2261fffd739dbaa9577cf8428a
https://doi.org/10.1016/0308-521x(94)p3272-v
https://doi.org/10.1016/0308-521x(94)p3272-v
Publikováno v:
Journal of Agricultural Meteorology. 48:795-798
To cope with estimated population growth in Asia, attainable rice yield potential must increase in the irrigated lowlands. At odds with this goal is the fact that yield potential of released high yielding rice varieties has remained constant since th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::972ed0b01b88d34d2bd5ac3a2c42366a
https://doi.org/10.2480/agrmet.48.795
https://doi.org/10.2480/agrmet.48.795
Publikováno v:
Agricultural Systems. 42:359-381
There is potential in cultivating cowpeas (Vigna unguiculata (L.) Walp.) in rice-based cropping systems in the humid tropics as a source of proteins for humans, forage for ruminants, and for improvement of soil fertility. Seasonal and yearly variabil
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::88b6d3c732fc228759fd5b2be33915e6
https://doi.org/10.1016/0308-521x(93)90100-g
https://doi.org/10.1016/0308-521x(93)90100-g
Publikováno v:
Environmental Entomology. 20:832-840
A simulation model of the population dynamics of Scirpophaga incertulas (Walker) was developed for ultimate use in pest management programs. The processes of development, mortality, migration, and oviposition are modeled. Information from literature
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::21143b10b9f97a89a9278831949f8cdd
https://doi.org/10.1093/ee/20.3.832
https://doi.org/10.1093/ee/20.3.832