Chemicals that can be added to a new tank to force it to cycle within a much shorter period of time10/8/2023 ![]() ![]() There are approximately 250,000 species of plants worldwide of those, about 3 percent, or 8,000 species, behave as weeds. The main difference between the two programs is that humans breed plants for yield, while nature breeds plants for survival. Weeds are naturally strong competitors, and those weeds that can best compete always tend to dominate.īoth humans and nature are involved in plant-breeding programs. Through manipulation, we control certain weeds, while other more serious weeds may thrive due to favorable growing conditions. Though we may try to manipulate nature for our own good, nature is persistent. Human activities create weed problems since no plant is a weed in nature. No matter which definition is used, weeds are plants whose undesirable qualities outweigh their good points, at least according to humans. a plant that is competitive, persistent, pernicious, and interferes negatively with human activity.a plant whose virtues have not yet been discovered. ![]() a plant that grows where it is not wanted or welcomed.a plant that is out of place and not intentionally sown. ![]() There are numerous definitions of a weed. ![]()
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