Sindhu, S.S.Deepak, Singh2017-06-032017-06-032014http://krishikosh.egranth.ac.in/handle/1/5810014367The experiment entitled “Mulching and Weed Control Studies in Guava” was conducted at Research Farm of the Department of Horticulture, CCS Haryana Agricultural University, Hisar during 2011-13 in rainy and winter season to find out the suitable mulching and herbicides on moisture status, weed control, nutrient content in soil and plants as well as improvement in growth, yield and quality of guava. The cultivar used for the investigation was Hisar Safeda. The treatments comprising six levels of mulches and nine levels of herbicides were laid out in a randomized block design with four replications keeping a net plot size of 6.0 x 6.0 m separately. The data recorded on various parameters, which were influenced by different levels of mulching and herbicides. In mulching experiment, the minimum value for soil pH and ECe, while, maximum values for soil moisture per cent, NPK and growth parameters viz. plant girth, spread, height, shoot length, and leaf water potential were recorded with black polythene of 100μ mulch which was at par with paddy straw mulch. However, maximum leaf NPK, TSS, ascorbic acid and minimum acidity were recorded in paddy straw mulch, while, maximum fruit weight, length, breadth and yield were recorded under black polythene of 100μ mulch which was statistically similar with paddy straw mulch. Minimum weed counts, fresh and dry weight of weeds at all monthly intervals were observed with black polythene of 100μ mulch during both the years in rainy and winter season. The two year results suggest that the paddy straw mulch has shown the best economical mulch for higher yield with quality fruit production at commercial scale. In weed control experiment, soil pH, ECe, leaf NPK, water potential and fruit acidity were remain unchanged during the time frame. However, manual weeding at monthly interval treatment found best for all other parameters viz., soil NPK, moisture, growth, yield, quality and weed parameters while, in herbicidal treatments, atrazine 2 kg + glyphosate 1% recorded best for the same. Manual weeding at monthly interval treatments gave the best results but it was very costly and herbicidal combination of atrazine 2 kg + glyphosate 1% resulted almost similar to manual weeding at monthly interval treatment. Atrazine 2 kg + glyphosate 1% found best economical combination for commercial production of guava with quality fruits. Paddy straw mulch and in herbicidial treatments, atrazine 2 kg + glyhosate 1% found best treatments for guava orchard in respect to all above characters under semi arid condition of Hisar (Haryana).encultivation, weeds, heterocyclic compounds, guavas, seasons, planting, crop residues, fruits, herbicides, purificationThesis