Titlebook: Systems approaches for agricultural development; Proceedings of the I Frits Penning Vries,Paul Teng,Klaas Metselaar Conference proceedings

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The impacts of climate change on rice yield: evaluation of the efficacy of different modeling approaERES (wetland rice) responses to temperature and CO. agree with recent experimental data from Baker et al. (1990c). RICESYS is an ecosystem model which predicts herbivory and inter-species competition between rice and weeds but does not include CO. effects. Its response to increasing temperature als

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Rice production and climate change smallest. Lack of accurate predictions of climate change contribute to a fair amount of uncertainty of the conclusions. Yet, the small response implies that climate change in itself is not an issue in relation to the challenge of developing new varieties of irrigated tropical rice with a significan

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A systems approach to the assessment and improvement of water use efficiency in the North China plaient distances from the water sources is to be optimized; (3) Areas with abundant water supply, means are to be found to excavate the underground free space to accommodate the excess water during the rain season.

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Adjustment of nitrogen inputs in response to a seasonal forecast in a region of high climatic riskfied. Assuming sowing takes place at onset, a set strategy based on 45 kg N ha. maximizes returns, but nil or negative returns were associated with N fertilizer inputs in 40% of seasons..The date of season onset was found to be a useful predictor of response to fertilizer inputs. A conditional strat

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l Development‘ (SAAD) at the Asian Institute of Technology (AIT), Bangkok, Thailand, in December 1991. The symposium had the following objectives: - to review the status of systems research and modeling in agriculture, with special reference to evaluating their efficacy and efficiency in achieving research go978-0-7923-1881-1978-94-011-2842-1

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