The causes, nature and rate of soil degradation in the northernmost states of Nigeria and an assessment of the role of fertilizer in counteracting the processes of degradation (anglais)

Soil fertility in the northern states of Nigeria has been maintained over long periods of time by the use of organic or farmyard manures and fallowing. Under the impact of rapid population growth and the expansion of the market, these systems are coming under strain with a possible adverse impact on crop yields and soil conditions in the longer term. This study is intended to analyse the linkages between soil degradation and its causes, its nature...
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