A pH below 7 indicates acidity, above 7 indicates alkalinity. Seed germinates and the plant grows, blooms, sets seed, and dies - all in one growing season. While decomposing organic matter in water, bacteria can greatly reduce the amount of oxygen in the water. They also can make water unsafe to drink. Typically you plant seeds in spring, set out the seedling plants in summer or fall.
Plants bloom the following spring, then set seed and die.
An area which acts to minimize the impact of pollutants on the environment or public welfare. For example, a buffer zone is established between a composting facility and neighboring residents to minimize odor problems. A buffer strip is also a grassed or planted zone which acts as a protective barrier between an area which experiences livestock grazing or other activities and a water body. Water in a canal must pass through, over, or under a check structure. The check structure opening or position is typically a function of the flow rate, and is adjusted to maintain a certain flow rate or water level.