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Agricultural prices and land degradation in Koutiala, Mali : a regional simulation model based on farmers' decision rules

Struif Bontkes, Tjark - In: Economic policy and sustainable land use : recent …, (pp. 151-168). 2001

Persistent link: https://www.econbiz.de/10001577261

Sustainability issues in East Asian rice cultivation

Keulen, Herman van - In: Dragons with clay feet? : Transition, sustainable land …, (pp. 265-291). 2007

Persistent link: https://www.econbiz.de/10003503971

Designing and evaluating alternatives for more sustainable natural resource management in less-favoured areas

López-Ridaura, Santiago; Keulen, Herman van; Giller, Ken E. - In: Sustainable poverty reduction in less-favoured areas, (pp. 65-90). 2007

Persistent link: https://www.econbiz.de/10003577141

Soil nutrient dynamics in integrated crop-livestock systems in the Northern Ethiopian Highlands

Abegaz, Assefa; Keulen, Herman van - In: Sustainable poverty reduction in less-favoured areas, (pp. 135-158). 2007

Persistent link: https://www.econbiz.de/10003577188

Plant-Animal - Day and night grazing by cattle in the Sahel

Ayantunde, Augustine A.; Fernández-Rivera, Salvador; … - In: Journal of range management 55 (2002) 2, pp. 144-149

Persistent link: https://www.econbiz.de/10006510080

Modeling biomass, nitrogen and water dynamics in rice-wheat rotations

Jing, Qi; Keulen, Herman van; Hengsdijk, Huib - In: Agricultural Systems 103 (2010) 7, pp. 433-443

Rice-wheat cropping systems occupy between 24 and 26Â Mha in Asia. A main feature of RW rotations is the alternation of aerobic and anaerobic soil conditions. This alternation of flooded and non-flooded soil conditions is conducive to N emissions, especially with the current high N rates in RW...

Persistent link: https://www.econbiz.de/10008870780

Improvement of Technical Efficiency in Rice Farming through Interplanting: A Stochastic Frontier Analysis in Yunnan, China

Revilla-Molina, Imelda M.; Bastiaans, Lammert; Keulen, … - Institut for Miljø og Erhvervsøkonomi, Syddansk … - 2008

We gathered survey data from a random sample of 200 farmer adopters and 59 nonadopters of rice interplanting in Yunnan Province, China in 2000. The data were used to analyze the effect of interplanting on technical efficiency of rice production and to identify the sources of inefficiency, using...

Persistent link: https://www.econbiz.de/10011123945

Sustainable resource management and policy options for rice ecosystems

Roetter, Reimund; van Keulen, Herman; Hengsdijk, Huib; … - In: Agricultural Systems 94 (2007) 3, pp. 763-765

Persistent link: https://www.econbiz.de/10005373749

Feed resources, livestock production and soil carbon dynamics in Teghane, Northern Highlands of Ethiopia

Abegaz, Assefa; van Keulen, Herman; Oosting, Simon J. - In: Agricultural Systems 94 (2007) 2, pp. 391-404

Persistent link: https://www.econbiz.de/10005216386

Heterogeneity and diversity in less-favoured areas

van Keulen, Herman - In: Agricultural Systems 88 (2006) 1, pp. 1-7

Persistent link: https://www.econbiz.de/10005216397