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plant growth regulator See growth regulator.
plant nutrition A plant's need for and use of basic chemical elements. See macronutrients, micronutrients.
plasmolysis Shrinkage of cytoplasm away from cell walls due to water loss.
There is not much that can be done to prevent flowering and seedhead production in lawns (plant growth regulators are used on golf course turf for this purpose).
or mixture intended for preventing, destroying, repelling, killing, or mitigating problems caused by any insects, rodents, weeds, nematodes, fungi, or other pests; and any other substance or mixture intended for use as a plant growth regulator, ...
 See also: Water, Plant, Soil, Growth regulator, Environment
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