Chitale, ShrikantMinz, Nainsi AkanchaUrkurkur, J.S.2019-09-072019-09-072019http://krishikosh.egranth.ac.in/handle/1/5810127004EFFECT OF NUTRIENT AND WEED CONTROL OPTIONS ON PRODUCTIVITY AND PROFITABILITY OF ORGANICALLY GROWN SWEET CORN (Zea mays L. saccharata)The present experiment entitled “Effect of nutrient and weed control options on productivity and profitability of organically grown sweet corn (Zea mays L. saccharata)”was conducted at Instructional cum Research Farm, Indira Gandhi KrishiVishwavidyalaya, Raipur (C.G.) during rabi2018. The soil of experimental field was sandy clay loam in texture with low nitrogen, medium phosphorus and high potassium. It was slightly alkaline in reaction with 7.2 pH.Sweet corn was sown on 21stJanuary 2019 keeping the planting distance of 60 × 20 cm and harvested on 15thApril 2019. The recommended dose of 80:60:40 kg N: P2O5: K2O ha-1 was applied at the time of sowing through organic sources of FYM, poultry manure and vermicompost.The experiment was laid out in split plot design with three organic nutrient management options in main plots and seven weed control options in sub plots. The treatments consisted of50% N (FYM) + 50% N (vermicompost); 50% N (FYM) + 50% N (poultry manure); 50% N (FYM) + 25% N (vermicompost) + 25% N (poultry manure) and weed control options hand weeding twice (20 and 40 DAS);black polythene mulch, straw mulch @ 5 tonne ha-1; mechanical weeding twice ( 20 and 40 DAS); live mulch (in-situ incorporation of green gram at 30 DAS); atrazine 1.0 kgha-1as pre-emergence and weedy check. Sweet corn “Sugar 75”was taken as test crop. The results of experiment on response of effect of organic nutrient and weed control options revealed that all the growth parameters like plant population, plant height, number of leaves plant-1, leaf area, leaf area index, dry matter accumulation and crop growth rate, yield attributes i.e. number of cobs plant-1,weight cob-1(cm), cob length (cm),number of row cob-1,number of grain row-1, number of grains cob-1, green cob yieldand stover yield, gross income (Rs.1,61,845 ha-1), net incomeand B:C ratio were significantly higher under 50% N (FYM) + 50% N (poultry manure). Significantly lowest values were obtained in50% N (FYM) + 50% N (vermicompost). Similarly all these parameters and yield attributes, green cob yield (4.03 t ha-1), gross income (Rs.1,84,398 ha-1), were also superior under black polythene mulch except net income (Rs. 116500 ha-1) and B : C ratio (2.93)which was obtained higher under atrazine @ 1.0 kg ha-1. The major weeds were Medicagodenticulata, Chenopodium albumand Echinichloacolona during crop growth period. As regard to weed control options, lowest density and dry weight of weeds,weed growth rate, relative dry weight of weeds,weed index and highest weed control efficiency were recorded underblack polythene mulchfollowed by atrazine @ 1.0 kg ha-1. Interaction effect of organic nutrient and weed control options was found significantly higher for green cob yield of sweet corn in 50% N (FYM) + 50% N (poultry manure)X black polythene mulch.ennullThesis