Effects of Potassium, Magnesium, and Micronutrient Fertilization on Snap Bean Yields and Plant Composition1
- Lloyd F. Seatz,
- T. R. Gilmore and
- A. J. Sterges2
Snap beans were fertilized with 4 levels of Mg at each of 2 levels of K, and with Mn, Cu, Zn, and a micronutrient mixture at a single K level. Bean yields were not affected by any of the treatments.
Top leaves, bottom leaves, and leaf petioles were taken for chemical analysis when the beans were in the early bloom stage of growth. Mg content of the bottom leaves was higher than that of the top leaves and petioles. Mg content increased with Mg applied and was higher at low K than at the high K level. Ca was also higher in the bottom leaves than in the top leaves or petioles. K content was higher in petioles than in leaves, and was higher at high K than at the low K level. No Mg effect was apparent.
Mg content of petioles increased regularly with Zn < Mn < Cu < Mixture treatments. Zn, Mn, and Cu increased the Ca content of the bottom leaves. Zn reduced the K content of the bottom leaves.
Bottom leaves contained a higher content of cations followed by petioles and top leaves.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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