Effect of N forms on maize yield and leaf components

A water culture experiment was established with maize to test the effect of N forms [(NH4)2SO4; CaNO3.4H 2O; urea] on yield, nitrogen (%), organic acids and sugar fractions. Plants that received NH4-N had the lowest yield. In all of the treatments total N (%) content of leaves were measured considerably high. ß-galactose was the dominating sugar fraction of all of the N treated plants and sucrose of the control. Dominating organic acids were malate in NH4-N receiving plants and cis-aconitate in NO3-N treated ones.