Soils of Inland Valleys of West Africa : Geographical Distribution of Selected Soil Fertility Parameters
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概要
- 論文の詳細を見る
Inland valleys (IVs) are distributed throughout most parts of West Africa and are used in the cultivation of most crops, rice especially. The total area of IVs is estimated to be 20-50 million ha in West Africa (Windmeijer and Andriesse, 1993). According to the estimation by Wakatsuki et al.(1994), the potential area for irrigated rice in whole sub-Sahara Africa is 20 million ha, of which more than 80% are distributed in West Africa. However, West Africa has presently only about 300 thousand ha of irrigated rice. Large quantities of rice are imported annually to compensate for the less than adequate annual production (WARDA 1986). In our previous paper, general fertility parameters of soils of inland valleys in four agro-ecological zones of West Africa were presented (Issaka et al.1994). In this paper, the geographical distribution of some selected soil fertility parameters and the possible effect of geological factors are analyzed.
- 社団法人日本土壌肥料学会の論文
著者
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MASUNAGA Tsugiyuki
Faculty of Life and Environmental Science, Shimane University
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WAKATSUKI Toshiyuki
Faculty of Agriculture, Kinki University
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Issaka R
Soil Research Institute Academy Post Office
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Issaka Roland
Faculty of Agriculture, Shimane University
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Masunaga T
Faculty Of Life And Environmental Sciences Shimane University
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Masunaga Tsugiyuki
Faculty Of Life And Environmental Science Shimane University
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Wakatsuki Toshiyuki
Faculty Of Agriculture Kinki University
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Wakatsuki T
Faculty Of Agriculture Kinki University
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