BOTANY
AGRONOMY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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sufficiently in advance of fertilization to allow time for analysis and return of results from the lab
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any time before bloom
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early season shortly after emergence
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the stage that corresponds to those used to develop interpretive guidelines
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Detailed explanation-1: -The stages of plant tissue culture are: selection/preparation (stage 0), initiation/establishment (stage 1), multiplication (stage 2), rooting (stage 3), and acclimatization/hardening (stage 4).
Detailed explanation-2: -Do not sample tissue that is diseased or damaged by insects or machinery. Place the plant tissue sample directly into clean paper bags or envelopes. If the plant tissue is wet or succulent, leave out in the air one day until wilted and partially dry. Do not put samples in plastic bags.
Detailed explanation-3: -Collect at least 25 leaves, one leaf (or two in the case of wheat) from each plant, randomly across the entire area. When analyzed, the plant tissue analysis can confirm the adequacy of nutrients or identify the inadequacy (or less often toxicity) of one or more nutrients.
Detailed explanation-4: -Place paper sample bag (do not use waxed or plastic bags) in oven set at 70-80oC. Drying may require 12 to 24 hours depending on the original condition of sample. To facilitate rapid drying, loosen and separate plant parts in sample bag. Samples should be dried to a crisp and brittle state and ground immediately.