@ARTICLE {LAL:1978,
title = {No-till farming after various grasses and leguminous cover crops in tropical alfisol; I: crop performance},
author = {Lal, R. and Wilson, G. F. and Okigbo, B. },
journal = {Field Crops Research},
year = {1978},
volume = {1},
number = {1},
pages = {71--84},
issn = {0378-4290},
}