Kuntyastuti, H., Purwaningrahayu, R. D. and Lestari, S. A. D. (2019) “Soybean growth and yield responses at third planting season to residual potassium fertilizer in a vertisol”, Journal of Degraded and Mining Lands Management. Malang, Indonesia, 6(2), pp. 1645–1651. doi: 10.15243/jdmlm.2019.062.1645.