(1)
Nurdin Sitohang, Erwin M. Harahap, Chairani Hanum, Tumpal H.S. Siregar , Hasril Siregar. The Effect of Balanced N.P.K.Ca.Mg Fertilizing on Flushing, Flowering and Pod Reserving in TSH 858 Clone Productive Cocoa (Theobroma Cacao L.). IJAST 2020, 29, 141 - 151.