Plant Archives Volume 20 No. 1, 2020 pp. 2248-2250 e-ISSN:2581-6063 (online), ISSN:0972-5210 EFFECT OF GYPSUM AND INTEGRATED NUTRIENT MANAGEMENT ON SOIL PROPERTIES OF PARTIALLY RECLAIMED SALT AFFECTED SOILS OF SOUTH GUJARAT S. D. Chaudhari 1 , V. R. Naik 2 , H. B. Sodavadiya 3 and B. K. Patel 4 1 Department of Agronomy, C. P. College of Agriculture, Sardar Krushinagar Dantiwada Agricultural University, Gujarat, India. 2 College of Agriculture, Waghai, NAU, Navsari, Gugajat, India. 3 Department of Agronomy, B.A. College of Agriculture, AAU, Anand, Gujarat, India. 4 Hill Millet Research Station, Navsari Agricultural University, Waghai, Gujarat, India. Abstract A field experiment was conducted on mungbean at Coastal Soil Salinity Research Station, Danti (Gujarat) to study the effect of gypsum and integrated nutrient management on soil physicochemical properties of partially reclaimed coastal salt affected soils of South Gujarat during rabi 2015-16. In all ten treatment combinations arising out of two levels of gypsum (G 0 : No gypsum and G 1 : gypsum @2 t/ha) and five levels of integrated nutrient management (F 1 : 100 % RDF: 20:40:00 NPK kg/ha, F 2 : 100 % RDF + Bio-compost @ 5 t/ha + Bio fertilizer : Rhizobium + PSB @ 1.25 l/ha, F 3 : 75 % RDF + Bio-compost @ 5 t/ha + Bio fertilizer : Rhizobium + PSB @ 1.25 l/ha, F 4 : 50 % RDF + Bio-compost @ 5 t/ha + Bio fertilizer : Rhizobium + PSB @ 1.25 l/ha, F 5 : Bio-compost @ 5 t/ha) were tested in factorial RBD. The results revealed that application of gypsum @ 2 t/ha significantly lower down the pH, ESP and bulk density of the soil and improved the water stable aggregates. Soil salinity and pH value did not influence significantly due to addition of organics, but there was significant improvement in WSA and at the same time bulk density of soil decreased. Key words: Gypsum, Organics, pH, EC, ESP, Bulk density, WSA Introduction Agriculture scenario in India is rapidly changing in response to various stresses experienced by cultivated lands. Agriculture sector cannot wait and must respond to manage the change and to meet the growing and diversified needs in the production to consumption chain. Nearly 70 million ha of agricultural land is affected by varying degree of salt problem in the country. In South Gujarat around 70,000 ha of land is salt affected and these lands are mainly situated on coastal belt. To feed the ever increasing population of India, productivity of these lands should be increased. Calcium sulphate popularly known as gypsum is one of the popular inorganic soil conditioners. It has its favourable effect on both soil physical and chemical properties. It softens and crumbles alkali hardpan, supplies calcium on low exchange capacity of soils and improves infiltration for some puddled soils (Trivedi et al., 2002). Addition of organics in conjunction with soil amendment like gypsum not only hasten the process of reclamation but also improve soil physical conditions as well as yield of crops grown on salt affected soils. Hence, to study the effect of gypsum and organics on physicochemical properties of salt affected soil present experiment was conducted. Materials and Methods A field experiment was conducted during rabi season of 2015-16 to study the effect of soil conditioner and organics on soil physicochemical properties and yield of mungbean grown on partially reclaimed salt affected soils. The soil of the experimental plot was clayey in texture, medium in organic carbon (0.31 %), slightly saline sodic with pH (8.81), EC (1.83 dSm -1 ), ESP (11.12) and low, medium and high in rating of available nitrogen (247 kgha - 1 ), phosphorus (27.1 kgha -1 ) and potassium (2465 kgha - 1 ), respectively. In all ten treatment combinations arising