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Life is all about compromise. We talked about controlling yellow foxtail in alfalfa with a combination of longer cutting interval and holding back on water for 7 days after cutting. What was the problem with waiting longer to cut? correct answers the nutriets available to the animals goes down severely when you wait to cut and decreases quantity Life is nothing but compromises. You are trying to decide between a grass cover crop and a legume cover crop which you will chop and use as a dying mulch to suppress weeds. As far as weed suppression, the problem with the grass mulch is: correct answers the problem with grass mulch is you need double the g per m^2 to suppress weeds compared to legumes or broad leaves. Net-like light penetration does not control for monocot weeds When using fire as a weed management tool in the annual exotic grasslands typical of California foothills, it is important to: correct answers burn just before seeds are dropped or else you will help the grasses come back Which path describes carbohydrate status after one cultivation or contact herbicide application: correct answers the carbohydrate levels drop slightly but if not controlled again will fully recover At what point should you apply a systemic herbicide to kill the perenniating structure: correct answers late july to early November when plant is moving to new rhizome growth and carbohydrates are still low. As all the carbohydrates and nutrients move into the roots as the weed goes dormant for winter Following soil solarization, it is important to: correct answers not disturb the soil because seed is only dead on top section Immediately following cultivation, it is important to: correct answers avoiding irrigating to not give weeds head start on crops Integrated weed management is: correct answers using different methods means integrating multiple weed control tactics into a single weed management program, optimizing control of a particular weed problem. The past several decades have seen simplified weed control practices that rely heavily on a few popular herbicides. However, the rapid spread of herbicide-resistant weeds has required farmers to incorporate alternative weed management approaches. While many farmers are incorporating different herbicides, this is likely to have only short-term success. Using non-herbicide approaches in combination with multiple, effective sites of action is needed for long-term success. 14. Classical biological control is likely to work when all of the following are true EXCEPT: correct answers it is best fit for a natural system where it can target its natural plant not run out of food which makes them stay contained. in an agricultural setting the control bug doesn't have enough efficiency or quick enough response time to make a difference that s worth the high cost.- enemy only feeds on that specific weed


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Subido en
15 de marzo de 2024
Número de páginas
7
Escrito en
2023/2024
Tipo
Examen
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