s:458:"%T Myths and science about the chemistry and fertility of soils in the tropics 
%A Sanchez P A 
%A Logan T J 
%X The overall misconception about universal tropical soil infertility is discussed, under soil fertility levels, clay mineralogy and soil organic matter contents, in five tropical agroecological zones. The zones discussed are (i) humid tropics, (ii) semi arid tropics, (iii) acid savannas, (iv) tropical steeplands and (v) tropical wetlands. 
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