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management water agriculture weeds weed practices factors food microbiology waterborne microbiology intrinsic preservation of food food preservation examination extrinsic preservation food azotobacter nitrogen fixation banana requirement rooting evapotranspiration transpiration soil growth stages drip irrigation basin and furrow method tensiometer depth irrigation depletion critical stages striga parasite exponential types growth nutrient macro phase organisms transformation spores science cell membrane bacteria prokaryotes shape size structure introduction intro vermicompost earthworms role feritlity biogas plant biofertilizer beneficial microorganisms compost composting organism useful abundance requirements death log micro lag curve soil feritility nutritional requirement export pest management constraints meaning and concept horizontal vertical maize wheat rice approaches agronomy diversification crop group brainstorming strategies dryland agriculture dryland contingent farming agriculture laws models of contract farm laws farm bill contract farming ³Ùü°ù origin himachal pradesh pulses technology production arhar sustainability ideas symptoms apple etiology spray scab hyacinth emersed nelumbium typha submerged rooted classification immersed floating loranthus cuscuta parasitic innovation origin of ideas lead generation focus creativity sources extension quality entrepreneur features entrepreneurship characteristics chenopodium venturia spiloacea lesions schedule orobanche