Survey the previous crop and between crops to determine the spectrum of weeds present. Records from previous crops help determine which weeds may be in the seed bank and require control before germination.
How to survey
Walk through each field in a random pattern, rating the degree of infestation for each weed species. Use either a numeric scale of 1 to 5 (1 being the lightest, 5 being the heaviest), or rate as "light," "medium," or "heavy."
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