What are the alternatives to using chemical herbicides?

What are the alternatives to using chemical herbicides?
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Corn gluten is the first alternative that comes to mind. Spread it in the fall or the spring but not when planting seed. It prevents weeds from germinating. The other alternative is to pull weeds by hand. However, this is very strenuous work and will be very prohibitive if you have a very big yard.
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Processes that break down the herbicides after application includes............................ a). Photo and microbial degradation b). adsorption and uptake c). leaching and runoff d). volatilization and run off

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factors to consider in improving the effectiveness of herbicides application a). Increasing management diversity b). application timing c). inherent efficacy of herbicide d). All

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Multiple resistance is the phenomenon in which a weed is resistant to two or more herbicides having a). same mechanisms of action b). different mechanisms of action c). same chemistry d). different chemistry

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Herbicides which avoids photodecomposition by being rapidly absorbed a.)Dinitroanilines b).Pinoxaden c).Sethoxydim d).quizalofop-p-ethyl

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A farmer, in order to save one spraying operations mix herbicides, insecticide, fungicide etc. at the time of spray, to achieve this feature add a). Compatibility agents b). Spreaders c). Activators d). Adhesive

Description : A farmer, in order to save one spraying operations mix herbicides, insecticide, fungicide etc. at the time of spray, to achieve this feature add a). Compatibility agents b). Spreaders c). Activators d). Adhesive

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