SHARMA, UDAYVERMA, ANJALI2019-11-012019-11-012019-10http://krishikosh.egranth.ac.in/handle/1/5810133767ABSTRACT The present investigation entitled “Effect of organic nutrient sources on growth and production of potato and turmeric” was carried out at the Experimental Farm of Department of Soil Science and Water Management, Dr Y S Parmar University of Horticulture and Forestry, Nauni, Solan, (HP) during 2016-17 and 2017-18, with the objective to develop an organic supply system for higher productivity of potato and turmeric on sustainable basis. The experiment was laid out in a randomized block design with four replications comprising eight treatments viz. T1 to T7 (i.e. application of graded doses of organics ranging from 100% RD N to 40% RD N, through VC & PM on 50:50 N-equivalence basis) and control where only FYM was added (T8). Organic nutrient sources significantly influenced growth, yield and quality of the crops; nutrient contents insoil and plants, and the microbial properties of the soil after crop harvest. Treatment T4 in potato i.e. 70% RD N recorded 74.6 per cent increase in yield over control along with highest B.C ratio (2.03). Similarly in turmeric treatment T2 i.e. 90% RD N recorded 30.5 per cent increase in yield over control along with highest B.C ratio 4.92. The effect of organic nutrient sources on the soil properties was pronounced and the application of 100% RD N in both the crops, exhibited the maximum values for the available nutrient contents as well as the biological properties (microbial biomass carbon, enzymatic activity and microbial count). From the present investigation, it can be concluded that application of 70% RD N through VC & PM on 50:50 N-equivalence basis and 90% RD N through VC & PM on 50:50 Nequivalence basis in potato and turmeric, respectively, can be suggested as a cost effective nutrient module for getting higher yield and quality, besides enhanced soil quality. Use of organic sources through vermicompost and poultry manure on 50:50 N-equivalence basis not only produced highest and sustainable crop yields but also enhanced fertility status of soil, which ultimately reflects a healthy soil.ennullThesis