Factors influencing the mineral content of snap beans, cabbage, and sweet potatoes
Arkansas Agric Expt Sta Bull 575: 1-14
The effect of potassium, calcium, and phosphorus applications on beans, cabbage, and sweet potatoes is presented. Increasing the con-centrations of K, Ca, and P in nutrient solutions increased the content of the respective nutrients in the bean pods, tops, and roots. The Ca content of the bean tops decreased with increasing concentrations of K in the nutrient solution. The P content of bean tops and the Ca and Mg contents of pods increased as the light intensity decreased. K and P applications to the soil in field experiments increased the percentage of the respective nutrients in bean pods, cabbage, and sweet potato roots. At the levels used Ca, K, and P applied to the soil in field experiments had no influence on the Ca content of bean pods, cabbage, or sweet potato storage roots. Di-hydrogen ammonium phosphate applied as a foliar spray resulted in an increase in the P content and a decrease in the Ca and Mg content of the bean plant. The green weight per plant of bean pods, leaves, and stem decreased with the high level of P uptake.