Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 34940
Title Nutrient management over extended cropping periods in the shifting cultivation system of south-west Cote d'Ivoire
Author(s) Reuler, H. van
Source Agricultural University. Promotor(en): A. van Diest; B.H. Janssen. - S.l. : Reuler - ISBN 9789054854869 - 189
Department(s) Sub-department of Soil Quality
PE&RC
Publication type Dissertation, internally prepared
Publication year 1996
Keyword(s) bodemvruchtbaarheid - zwerflandbouw - plantenvoeding - kunstmeststoffen - mest - extensieve landbouw - agrarische bedrijfsvoering - innovaties - ivoorkust - soil fertility - shifting cultivation - plant nutrition - fertilizers - manures - extensive farming - farm management - innovations - cote d'ivoire
Categories Cropping Systems / Soil Fertility
Abstract
Intensification of food crop production in shifting cultivation systems can contribute to protection of tropical forest. For such an intensification knowledge of soil fertility and its dynamics is essential. It was tested whether intensification could be achieved by extending the cropping period in on-farm field trials with controlled management. These trials were conducted on locations along catenas ranging from the crest to the fringe of the valley bottom. On the (moderately) well drained soils P proved to be the yield-limiting nutrient. In extended cropping systems with alternately rice and maize, applications of N, P and K were not sufficient to maintain the yield level obtained in the first season after clearing. Yield decline was much less pronounced for maize than for rice. In the eighth season after clearing yields of over 4 ton of maize per ha were still obtained. Data on the efficiency of utilization of absorbed P indicate that factors other than P deficiency caused the yield decline. A probable cause is deterioration of soil physical properties. Fertilizer recommendations (N,P,K) are formulated for the well drained soils of the upper/middle slopes and for the moderately well drained soils of the lower slope.
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