UPTAKE OF COBALT AND MANGANESE BY WINTER-WHEAT FROM A SANDY LOAM SOIL WITH AND WITHOUT ADDED FARMYARD MANURE AND FERTILIZER NITROGEN

The influence of three rates of nitrogen (N) fertilizer on the availability of native cobalt (Co) and manganese (Mn) for winter wheat grown on a sandy loam soil with (FYM) and without (Non-FYM) farmyard manure was studied in a field experiment. Increased N fertilization resulted in higher rates of Co and Mn uptake by the crop. The effect was higher in the field which received farmyard manure compared to that which has not. Winter wheat developed significant (P<0.01) differences in the rate of uptake for Co and Mn between the two fields. The main vareiation between the sites couled be explained by the history of FYM application which was able to explain 28% of the total nitrate (NO3) cocentration found in the soil solution.