Sharma, RakeshJasrotia, Karmanya2023-12-112023-12-112023-05-03https://krishikosh.egranth.ac.in/handle/1/5810202669The present investigation was conducted to study the effect of different bio-organic nutrient sources on soil properties and yield of pea (Pisum sativum L.) in sub-tropics of Himachal Pradesh. The experiment was carried out during rabi 2021-22 at experimental farm of the Department of SoilScience and Water Management, College of Horticulture and Forestry, Neri, Hamirpur. The experiment was carried out in a randomized block design with nine treatments replicate thrice. These nine treatments were T1= Beejamrit + Jeevamrit @ 5% at weekly interval, T2= FYM @ 20 t/ha + R.D.F (recommended practice of manures and fertilizers), T3= FYM @ 20 t/ha + Beejamrit + Jeevamrit @ 5% at weekly interval, T4= FYM @ 20 t/ha + Beejamrit + Jeevamrit @ 5% at fortnight interval, T5= vermicompost @ 5 t/ha + R.D.F, T6= Vermicompost @ 5 t/ha + Beejamrit+ Jeevamrit @ 5% at weekly interval, T7= Vermicompost @ 5 t/ha + Beejamrit + Jeevamrit @ 5% at fortnight interval, T8= Ghanjeevamrit + Beejamrit + Jeevamrit @ 5% at fortnight interval and T9= 100 per cent R.D.F where, R.D.F was recommended dose of fertilizers (NPK = 25:60:60 kg ha-1). Results of the investigation revealed that treatment T6 was proved to be best with respect to pea growth parameters and yield attributing characters. It also enhanced the quality parameters, nutrient uptake by the crop and performed better than recommended dose of manures and fertilizers(T2). The same treatment (T6) recorded an increment of 20.54 % in pod yield per hectare over (T2) along with highest benefit: cost of 2.22. Treatment T3 followed by T6 significantly improved the water holding capacity, organic carbon content, available N, P, K, S, DTPA-extractable micronutrients (Fe, Cn, Zn and Mn) of soil. Treatment T3 also showed significant increase in microbiological properties such as total microbial population, N-fixing bacteria, PSB, MBC, MBN, soil respiration as well as biochemical properties i.e., alkaline phosphomonoesterase, cellulase, urease and dehydrogenase. Pod yield had positive and significant correlation with plant height, pods per plant, number of seeds per pod and length of pods as bio-organic nutrient sources influenced the crop yield. All the soil properties were positively and significantly correlated with pod yield which indicated the importance of soil properties for the nutrient turn-over and availability to plants. Thus, it can be concluded that beejamrit and jeevamrit @ 5 per cent at weekly interval in combination with FYM, vermicompost and ghanjeevamrit showed better results over combined application of RDF with FYM and vermicompost.EnglishThesis