Author(s):

Sukha Ram Meena, Sharma SK, Sharma Mahendra and Ratnoo RS

Abstract: A field study entitled “Effect of long term application of fertilizer and manure on physico-chemical properties of soil under maize-wheat sequence in Heplustepts” was conducted during Kharif 2013-14 and 2014-15 in the Long Term Fertilizer Experiments initiated in Kharif, 1997 at the Instructional Farm of the Rajasthan College of Agriculture, Udaipur. The soil of the experimental site was sandy clay loam in texture, slightly alkaline in reaction, medium in available nitrogen and phosphorus, while high in potassium and zinc. The objectives were to assess effect of continuous application of fertilizer and manure on physic-chemical properties of soil. The treatment consisted of control, 100 % N, 100 % NP, 100 % NPK, 100 % NPK + Zn, 100 % NPK + S, 100 % NPK + Zn + S, 150 % NPK, 100 % NPK + Azotobacter, FYM 10 t ha^-1 + 100 % NPK (-NPK of FYM), 100 % NPK + FYM 10 t ha^-1 and FYM 20 t ha^-1. These treatments were evaluated under randomized block design (RBD) with four replications. The results of the present investigation revealed that the highest available nitrogen were obtained in treatment under the application of 100% NPK + FYM 10 t ha^-1 and the highest available phosphorus was obtained in treatment 100% NPK + Seed treatment with Azotobactor. The highest potassium was obtained in treatment 150% NPK and the highest Organic carbon was obtained in treatment FYM 20 t ha^-1. The highest available water content and Soil Aggregate were obtained in treatment FYM 20 t ha^-1.

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