Effect of Continuous Application of Organic Manures and Ammonium Sulphate in Mulberry field on some Soil Properties

The effect of continuous application of organic manures and ammonium sulphate for 15 years on some physical, chemical and physico-chemical properties of soils growing mulberry was evaluated. Use of ammonium sulphate and cowdung resulted in a decrease in pH, total exchangeable bases and exchangeable calcium but the latter two were increased under compost and mustard cake treatments. Compost, cow-dung and mustard cake or their combination with ammonium sulphate raised the C. E. C. of the soils but ammonium sulphate alone did not bring about any such change. Organic carbon and total and available nitrogen in the soils increased with compost and cowdung application but not under oilcake or ammonium sulphate. Organic manures brought about a significant increase in the water holding capacity of the soils over control.