Yadav, Dharam BirRajbir Singh2016-10-252016-10-252016http://krishikosh.egranth.ac.in/handle/1/81874A field experiment was conducted at Regional Research Station, Uchani, Karnal of CCS Haryana Agricultural University, Hisar, Haryana (India) during kharif 2015. Treatments comprised of four main plot treatments (planting methods) viz., raised bed with residue, raised bed without residue, zero tillage with residue and zero tillage without residue, and six sub-plot treatments with combination of three maize hybrids viz., HQPM-1, HM-4 and HM-10 and two weed control treatments viz., atrazine 750 g/ha (PRE) fb 1 HW at 30 DAS and unweeded check. The experiment was laid out in split plot design with three replications. Weather data revealed that rainfall received during the cropping season was 430.3 mm, which was well-distributed up to September which resulted in good crop stand and growth. Important weed species observed in the experimental plots were Dactyloctenium aegypticum, Brachiaria reptans, Eragrostis tenella, Portulaca oleracea, Ammania baccifera and Cyperus rotundus along with some other broadleaf weeds. In planting methods, zero tillage with residue recorded lowest density and dry weight of weeds, higher grain and stover yields and net income with good crop growth at all growth stages as compared to other methods. Zero-tillage (ZT) was found superior to raised bed due to lower weed density and dry weight, better growth parameters (plant height, LAI, CGR, dry matter accumulation), yield attributes (cob length, girth and weight, number of grains/cob, 100-grains weight, harvest index), net returns and B: C. ZT gave grain and stover yields at par with raised bed. Similarly, residue retention was better than without residue in respect of all the above parameters including yields and net returns. Lower weed density were recorded in HM-10 and HM-4 as compared to HQPM-1. The hybrid HM-4 provided minimum dry weight for broadleaf weeds, maximum yield attributes and yield fetching higher net returns and B: C, while HM-10 had minimum dry weight for grassy weeds and sedges with higher growth parameters. In weed control methods, lower density and dry weight of weeds, higher grain and stover yields, net income and B: C were obtained with application of atrazine 750 g/ha (PRE) fb 1 HW at 30 DAS, with good crop growth and growth indices at all growth stages as compared to unweeded check.enMarkets, Market regulations, Marketing, Selection, Biological development, Storage, Economics, Manpower, Grading, IrrigationThesis