Asian Jr. of Microbiol. Biotech. Env. Sc. Vol. 24, No. (3) : 2022 : 515-518 © Global Science Publications ISSN-0972-3005 DOI No.: http://doi.org/10.53550/AJMBES.2022.v24i03.0013 EFFECT OF ORGANIC AND INORGANIC FERTILIZERS ON PHYSICO-CHEMICAL PROPERTIES OF SOIL AND CLUSTER BEAN YOGITA SHARMA 1 , AMREEN HASAN* 2 , TARENCE THOMAS 3 , ARUN A. DAVID 4 AND TARUN KUMAR 5 Department of Soil Science and Agricultural Chemistry (Naini Agricultural Institute) Sam Higginbottom University of Agriculture, Technology and Sciences Prayagraj 211 007, U.P. India (Received 1 April, 2022; Accepted 22 May, 2022) Key words: Physico-chemical properties of soil, Neem Cake, Rhizobium, Yield. Abstract– An experiment was conducted during Kharif season (July – October) 2021 on crop research farm Department of Soil Science & Agricultural chemistry at SHUATS. The experiment was laid out in Randomized Block Design having three levels of Neem Cake @ 0%, 50%, 100% and three levels of Biofertilizer (Rhizobium) @ 0%, 50% and 100% respectively. The results show that the application of different levels combination of Neem Cake and Biofertilizer increased growth, the yield of cluster bean and improved soil chemical properties. However, some parameters of soil’s physical properties decreased. It was recorded from the application of Neem Cake and Biofertilizer (Rhizobium) treatment T 9 [ NC @ 100% + R @ 100%] maximum Bulk density 1.177 Mg m -3 at 0-15 cm and 1.382 Mg m -3 at 15-30 cm, Particle density 2.145 Mg m -3 at 0-15 cm and 2.410 Mg m -3 at 15-30 cm, % pore space 45.11% at 0-15 cm and 42.66% at 15-30 cm, Water holding Capacity 59.09 % in 0-15 cm and 48.44 % at 15-30 cm, pH 7.25 at 0-15 cm and 7.46 at 15-30 cm, EC 0.260 dSm -1 at 0-15 cm and 0.230 dSm -1 at 15-30 cm, % Organic Carbon 0.615 % at 0-15 cm and 0.464 % at 15-30 cm, Available Nitrogen 215.12 kg ha -1 at 0-15 cm and 286.90 at 15-30 cm kg ha -1 , Available Phosphorus 30.72 kg ha -1 at 0-15 cm and 28.35 kg ha -1 at 15-30 cm, Available Potassium 232.55 kg ha -1 at 0-15 cm and 196.10 kg ha -1 at 15-30 cm. INTRODUCTION Cluster bean [ Cyamopsis tetragonoloba (L.)] commonly known as Guar. The word “Guar derives from Sanskrit word “Gau aahar” which means cow fodder or otherwise fodder of the animals. This crop is an outstanding legume crop grown mainly under a rainfed situation in arid and semi- arid regions of Rajasthan throughout Kharif season. It is pretty hardy and sophisticated dryness crop which is especially suited for soil and climate of Rajasthan. Its deep penetrating roots allow the plant to uptake available moisture more efficiently and thus extend the much scope for rainfed cropping. The crop also ensures even at reasonable salinity and alkalinity situations. Amidst dry land crops, it holds a significant status in the national economy because of its industrial value principally due to 35 to 40 per cent gum in its endosperm Ayub et al., (2012). Guar gum has been used extensively in several industries like textiles, paper, oil, pharmaceuticals, food processing cosmetics, mining explosives, oil drilling etc. The demand of cluster bean is growing rapidly at international market due to the presence of natural polysaccharide, galactomannan gum content in seed endosperm. It also gives nutritional concentrate and fodder for animals and supplements to the fruitfulness of soil by fixing a substantial quantity of atmospheric nitrogen (37-196 kg N ha -1 per year). In India, cluster bean has covered 5.6 million hectares with the total yearly production of 2.7 million tonnes (Anonymous, 2016- 17). Organic materials are intrinsic and essential components of all soils and it makes a living dynamic system in the soil that supports all life