Katayama, K and Ito, O and Adu-Gyamfi, J J and Rao, T P and Dacanay, E V and Yoneyama, T
(1999)
Effects of NPK fertilizer combinations on yield and nitrogen balance in sorghum or pigeonpea on a vertisol in the Semi-Arid Tropics.
Soil Science and Plant Nutrition, 45 (1).
pp. 143-150.
ISSN 0038-0768