1. Water essential for nutrient uptake;Barber;Plant Food Rev,1964
2. Life history and composition of the soybean plant;Borst;Ohio Agric. Exp. Stn. Bull,1931
3. Phosphorus and potassium increase quality, reduce diseases of soybeans;Camper;Better Crops Plant Food,1978
4. Effect of potassium on the incidence of Diaporthe sojae in soybean;Crittenden;Agron. J,1974