Evaluation of the Effectiveness of the Urea Deep Placement (UDP) Technology on Upland Maize Production.
Sampson Agyin-Birikorang1, Rahman Issahaku2, Bidjokazo Fofana2 and Abdoulaye Mando2, (1)International Fertilizer Development Ctr., Muscle Shoals, AL, US, (2)Agriculture Technology Transfer Project, IFDC, Tamale, Ghana