Author(s):

AV Rajani, SP Gediya, AS Jadeja and DV Hirpara

Abstract: Surfaces soil samples (0-15 cm) were collected to study Long term effect of balance nutrient management on Soil chemical properties soils of the LTFE’s conducted on groundnut-wheat cropping sequence at Instructional Farm, Junagadh Agricultural University, Junagadh during the year 2002-03(4^th year), 2006-07 (8^th year), 2010-11 (12^th year) and 2014-15(16^th year) after completion of crop cycle. The electrical conductivity of soil was found significantly differ in 4^th, 8^th, 12^th year and pooled result. Application of FYM and fertilizer reduced the electrical conductivity of soil. The soil reaction was found significant in 16^th year and pooled data. The application of FYM could be ascribed to the acidifying effect of organic acids produced during the course of decomposition of organic matter. This could be also due to greater buffering action of organic matter. The cation exchange capacity of soil after completion of wheat crop significantly affected, under the plot of T₉ in 4^th, 8^th, 12^th, 16^th year and pooled over year. The interaction effect between year and treatment was found significant on cation exchange capacity of soil. This increase in CEC was due to improvement in organic carbon content of soil. The organic carbon of soil was significantly increased by application of FYM in 8^th, 12^th and 16^th year. This shows that use of FYM alone helps in increasing the organic carbon content of the soil.

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