Effect of soil dunging on absorption of iron, copper, zinc and manganese

The objective of this rearch was the study of the effect of mature application on the behaviour of iron, copper, manganese and zinc in the soil with and without addition of these four elements in a greenhouse pot experiment using wheat as the plant control. The results of this study showed that the status of these micronutrients was different after manure application. Plant analyses showed that iron, zinc and manganese concentrations increased with increasing rates of applied manure up to 2.0% and decreased when the applied manure reached 4.0%. The observed increase varied from 22.7 to 192.8%, 19.8 to 82.1%, and 3.2 to 15.1% for iron, zinc and manganese respectively. The behaviour of copper was different from that of iron, zinc and manganese, in that the addition of manure associated with that of copper induced a significant decrease in copper concentration in the plant which varied from 7.1 to 50.0%. However, when no copper was added, manure applications induced an increase in plant copper concentration which varied from 11.7 to 58.8%.