B.M. ChowdharyRavindra Kumar2024-06-262024-06-261996https://krishikosh.egranth.ac.in/handle/1/5810210920Coriander ( coriandrum sativum) is one of the most important spice crops grown widely in India. In Bihar, particularly in Ranchi area, coriander is grown for green purpose and recently for seed yield also. It has tremendous production potentially and the production can be increased to a great extent by judicious cultural practices and optimum use of manures and fertilizers. The experiment entitled Effect of NPK on the growth and yield of coriander was conducted during winter season of 1994-95 at vegetable section of horticulture Garden under the faculty of Agriculture ,Birsa Agriculture university,Kanke ,Ranchi.The experiment was conducted in Randomised Block Design having twenty seven treatment, replicated three times with a objective to ascertain the proper dose of nitrogen,phosphorus and potash.The concentreation of treatments wereN0,N50,N100,P0.P30,P60 and K0,K20,K40 Kg/ha. The half of nitrogen and full amount of phosphorus and potash were applied as basal dose, at the time of sowing. The remaining half of nitrogen was applied as top dressing after 70 days of sowing. Results revealed that coriander yield vegetative and reproductive is influenced by the fertility status of the soil. At the time of harvesting, maximum plant height 126.86 cm. number of branch 7.33 and spread of plant 60.46 were observed for the combination of NPK 100:30:20,100:30:0,100:30:0 and 100:60:0 kg/ha respectively .Days to first flowering,50%flowering and first fruiting from the date of sowing were found to be significantly lower for must of the treatments over control. The nitrogen was found to initiate earlier flowering and fruiting compared to other nutrients (P&K).Number of umbels per plant was observed ,maximum 158.73 for 100:30:0 and minimum in control 47.06 ).Number of bunch per umbel was found to be maximum 7.00 for100:60:20 Kg/ha and minimum in control(5.33).Number of flowers per bunch was significantly affected by all the treatment combination except five 0:30:20, 0:60:20,0:60:40 and 50:0:0kg NPK per ha. Seed yield per plant was found significantly higher for all the treatments over control, except 0:30:0, 0:30:20, 0:30:40, 0:60:0, 0:60:20 and 0:60:40NPK Kg/ha which did not increase yield significantly. Maximum yield per plot and per ha was found in the case of treatment getting NPK, 100:30:0 kg/ha(20.67qt/ha).All the treatments were found to be significantly superior to control, except the treatment 0:0:20(N:P:K).The highest benefit/cost ratio(4.80:1) was obtained in coriander by use of N100 P30 K0. Based on these observation judicious use of 100kgN/ha+30Kgp/ha +0KgK/Ha application is suggested for maximum growth and yield of coriander cultivation. However potash may be added, if these oil is deficient.EnglishThesis