EFFECT OF LONG TERM ROTATION, NITROGEN FERTILIZER AND TILLAGE ON SOIL QUALITY AND MAIZE YIELD IN THE NORTHERN GUINEA SAVANNA OF NIGERIA
Abstract A long-term field experiment was established in 2003 at the Institute for Agricultural Research, (I.A.R) Samaru, northern Guinea savanna of Nigeria to evaluate the effect of N fertilizer on maize grown in rotation with maize, cowpea and soybean. The trial was modified to accommodate tillage as an additional experimental factor in 2009. Ten years later (in 2013), soil and crop data were collected to determine the influence of the ...
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