See how the pods are all dry? Now can you also see how the leaves are not dry? That's a problem, because (as I said yesterday) green and soggy plants tend to gum up machinery. Those leaves need to dry out, and fast. So farmers will use a chemical defoliant for the job.
Defoliants dry out out plants. And in a matter of days it turns the above plants into these:
Now that they're all brown and crispy, they'll run through a combine quite nicely. That's an article for a later time, though. A surprising amount of the alfalfa survives this and will begin growing anew, so combining will follow shortly. I'll get that post to you soon enough. Have a lovely Wednesday.
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