@ARTICLE {OHIRI:1990,
title = {Tillage effects on cassava (Manihot esculenta) production and some soil properties},
author = {Ohiri, A. C. and Ezumah, H. C. },
journal = {Soil Tillage Research},
year = {1990},
volume = {17},
pages = {221--229},
note = {RTB; Root and Tuber; Cassava},
}