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ThesisItem Open Access Impact of Integrated Nutrient Management on Soil properties under Legume based Agroforestry Systems(CCSHAU Hisar, 2022-07) Suman; Bhardwaj, K.K.The present investigation entitled “Impact of Integrated Nutrient Management on Soil properties under Legume based Agroforestry Systems” was conducted at Research Farm of Forestry Department, CCS Haryana Agricultural University, Hisar, during 2020-21 to evaluate the effect of INM under different agroforestry systems on soil physical, chemical, biological properties and also on yield and nutrient uptake by mungbean. Soil samples from different tree based systems (Poplar+Mungbean and Eucalyptus+Mungbean) and control (devoid of tree) were analysed for different soil properties at 0-15, 15-30, 30-60 and 60-90 cm depth. Moisture content increased significantly with increase in soil depth and it decreased in tree integrated system. Soil texture changes from loamy sand to sandy clay loam with increase in depth. The bulk density of soil was significantly influenced by soil depths but the effect of treatments, systems and their interactions was found non-significant. Highest infiltration rate (3.0 cm/h) was observed in T4 (Vermicompost @ 1 t/ha) treatment followed by T2 (FYM @ 2 t/ha) treatment under different cropping systems. Depth-wise, significantly lowest saturated hydraulic conductivity (0.139 cm/h) was observed in mungbean sole crop (60-90 cm) and highest (0.226 cm/h) was in Poplar+Mungbean (0-15cm) system. Effect of tree based system and soil depth was significant on EC of soil whereas influence of treatments applied and their interaction was found non-significant. The influence of system, soil depth, treatments and their interaction on soil pH, CaCO3 and total N was found non- significant. Organic carbon, available N, P and K were 19.2, 19.4, 32.8 and 10.8 % higher in poplar based agroforestry system as compare to control, respectively. Significantly highest micronutrient contents recorded in Poplar+Mungbean system and lowest in sole mungbean crop. The NH4+_ N and NO3- - N improved significantly under tree based system. MBC, phosphatase, dehydrogenase and urease activities were 34, 23.4, 34.1 and 26.3% higher in poplar based agroforestry system as compare to control, respectively. Grain and straw yield of mungbean in control (devoid of trees) were 1.87 and 1.84 times higher as compare to poplar and eucalyptus based agroforestry system, respectively. By application of different treatments it was observed that RDF (T1) leads to an increase in grain yield of mungbean by 39, 54.5, 25.9, 17.4, 33.2, 69 and 77.1% over treatments T2, T3, T4, T5, T6, T7 and T8, respectively and in straw yield, RDF (T1) leads to an increase of 40.4, 62.6, 24, 21.6, 34.4, 76.4 and 79.9% over treatments T2, T3, T4, T5, T6, T7 and T8, respectively. Nutrient content in grain and straw was found not to be significantly affected by different treatments under different agroforestry systems but nutrient uptake was significant. Organic carbon showed significant positive correlation with available N, P, K, MBC, dehydrogenase activity and phosphtase activity. Hence it may be concluded that agroforestry system and organic manure enhanced soil organic matter and improved soil properties whereas the yield of mungbean was reduced.