Negi, M.S.Ardeep2020-11-032020-11-032020-09https://krishikosh.egranth.ac.in/handle/1/5810154201The present investigation was conducted during 2018-19 and 2019-20 at Medicinal Plants Research and Development Centre (MRDC) of G. B. Pant University of Agriculture and Technology, Pantnagar, District Udham Singh Nagar (Uttarakhand) India, to study the impact of spacing and NPKS management on growth, yield and quality of basil (variety CIM saumya) and subsequent residual effect on mustard crop. The experimental soil was sandy clay loam in texture, neutral in reaction, medium in organic carbon, low in available nitrogen and high in available phosphorus, exchangeable potassium and available sulphur. The experiment was laid out in split plot design (SPD) with three replication having three spacing (40 X 40, 50 X 40 and 60 X 40 cm) as main plot treatment and six NPKS levels (100:60:40:0 (RDF), 100:60:40:20, 100:60:40:40, 120:60:40:0, 120:60:40:20 and 120:60:40:40 kg NPKS ha-1, respectively) as sub plot treatment in basil (Ocimum basilicum) experiment. After the harvest of basil crop mustard crop was grown on residual fertility of basil crop with different varieties (Kranti, PR 20 and NRCHB 101) as main plot treatment and residual fertility of basil crop as sub plot treatments with one recommended dose of fertilizer (RDF) which replaced RDF of basil crop. The spacing of 40 X 40 cm along with 120 kg nitrogen, 60 kg phosphorus, 40 kg potassium and 40 kg sulphur per hectare gave higher growth, herbage yield, essential oil yield and benefit: cost ratio in basil crop compared to other spacings and NPKS levels. Succeeding mustard crop, gave higher number of siliquae per plant, number of seeds per siliqua, length of siliqua, 1000 seed weight, seed yield and stover yield with the application of recommended dose of fertilizers which was on a par with the residual fertility level of 120 kg N+60 kg P2O5+40 kg K2O+40 kg S ha-1 of basil. On the basis of present study, it can be inferred that basil crop performed better when grown at a spacing of 40 X 40 cm along with the application of 120 kg nitrogen, 60 kg phosphorus, 40 kg potassium and 40 kg sulphur per hectare. The yield of mustard variety NRCHB 101 was found higher compared to Kranti and PR 20 when grown on residual fertility of basil crop. The system productivity of basil - mustard cropping system was higher under 40 X 40 cm spacing of basil along with application of 120 kg nitrogen, 60 kg phosphorus, 40 kg potassium and 40 kg sulphur fertilizers per hectare. Thus, for higher profitability of basil - mustard cropping system, growing of basil (Ocimum basilicum) at a spacing of 40 X 40 cm along with the application of 120 kg nitrogen, 60 kg phosphorus, 40 kg potassium and 40 kg sulphur fertilizers per hectare can be recommended for betterutilization of nutrients in Ocimum basilicum crop and harnessing the residual effect on mustard crop.EnglishThesis