In India, pulses are grown mostly on marginal and sub-marginal lands without proper inputs. Many field experiments on various pulse crops show yield benefits from K application. Improved K supply also enhances biological nitrogen (N) fixation and protein content of pulse grains.
The soybean aphid has become the most important insect pest of soybeans in the North- east and Midwest regions of North America. It often damages soybean plants that are K-deficient more than those that are not.