Effects of Soil and Foliar Applications of Humic Substances on Dry Weight and Mineral Nutrients Uptake of Wheat under Calcareous Soil Conditions

Abstract: A greenhouse research was conducted to determine the effects of soil and foliar applications of humic substances on dry matter and some nutrient elements' uptake of wheat grown under 3 calcareous soil conditions. Agricultural lime was used to obtain five CaCO doses (0, 5, 10, 20 and 40 %). The solid humus was applied to the soil at 0, 1 and 2 g kg doses one month before planting humus treatment. Foliar application of the Humic acid had statistically significant effect on Mg, Fe and Mn uptake. humic acid raised the dry weight and N, P, K, Ca, Mg, Na, Fe, Cu, Zn and Mn uptake of plants at non limed pots and the amounts were found high at 0.1 % dose of humic acid. The second dose (0.2 %) was found much more effective on dry weight and nitrogen uptake at high lime conditions