alfalfa: leguminous plant grown for hay or forage
fodder: coarse food (especially for livestock) composed of entire plants or the leaves and stalks of a cereal crop
potassium chloride: salt of potassium (KCl) (trade names K-Dur 20, Kaochlor and K-lor and Klorvess and K-lyte); taken in tablet form to treat potassium deficiency