Absorption of nutrients such as NO - 3, H 2PO - 4,K +,Ca 2+ ,SO 2- 4,Mg 2+ ,Zn 2+ ,and Cl - by plants. Such as barley, wheat, rice, corn and legumes was extensively investigated. It has been tested and proved by numerous experiments that kinetic parameters ( K m, I max , C min and E ) of given nutrient ions vary greatly among species and cultivars, and are influenced by plant age and nutrient supply. It follows that the parameters are of theoretical and practic...