Abstract
A pot experiment was conducted to study the phosphorus-micronutrients interaction in calcareous soils for two years. Four rates of phosphorus (0, 25, 50 and 75 mg P20, kg'') were applied to wheat crop grown in three types of soil containing 3, 7 and 11% lime contents. hi the first year of experiment, phosphorus eb 25 mg P,O, kg-, in soil containing 3% lime and 50 mg P20, kg"/ in soil containing 7% lime increased zinc contents of soil but, beyond these rates, decreased zinc contents of soil. Phosphorus application upto 50 mg 11205 kg-' increased zinc concentration in plant and decreased zinc concentration of plant at 75 mg P20, kg-, in all types of soil. In the second year of experiment, phosphorus application decreased zinc content of soil containing 3% lime. Increasing rates of phosphorus reduced zinc concentration in plants grown in soils containing 3 and 7% lime while in soil having 11% lime, last level of phosphorus (75 mg P20, kg") decreased zinc concentration in plants. Addition of phosphorus depressed iron concentration in plants grown in soil containing 11% lime during first year of experiment. Application of phosphorus did not influence manganese concentration in plant during both the years of experiment.
Tariq Siddique, M. Rashid , M. Saeed. (1999) Phosphorus - micronutrients relationship studies in wheat crop grown in calcareous soils, The Journal Soil & Environment , Volume 16, Issue (1-2).
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