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Johnson doesn't expect the hand weeding to provide any long-term economic benefits, but he wanted to do something to keep the weed populations down this year. In agriculture, for instance, practices such as letting plots lay fallow for years at a time, intensive hand weeding, and cultivating a diversity of crops, often in the shade of fruit- or lumber-producing trees have in certain places given way to shorter crop rotation cycles, increased chemical use, and crop monocultures. state to ban hand weeding of most agricultural crops, a practice that can lead to crippling back injuries. |
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