Abstract
A field experiment was conducted in Lampung, Indonesia to determine synergistic effect of rock phosphate and minimum tillage for ameliorating acidity and optimising soybean yield. The experiment was arranged in a split-plot design. The main plots were conventional and minimum tillage, while rock phosphate (14.4% P) rates of 0, 100, 200, 300, 400 and 500 kg ha-1 were the subplots. Minimum tillage produced soybean yields 24% higher than conventional tillage and rock phosphate increased soybean yield significantly. Each kilogram of rock phosphate increased soybean grain yield by 1.5 kg. The residual effect of rock phosphate was still evident in the fourth season. The response of soybean to rock phosphate was attributed to its ameliorating effect on acidity and increases in extractable P and exchangeable Ca.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
