b. about 85% of the bodyâs phosphorus is located in bones and teeth. c. the phosphoric acid in cola drinks has little effect on bone content. d. the ratio of phosphorus to calcium in the diet is important for bone maintenance.
Grass that grows in undesirable locations, such as between the cracks of a sidewalk, can be killed with chemicals called non-selective herbicides. Every herbicide, even ones with the same active ingredient, can have different strengths. Therefore, purchase herbicides in a ready-to-use container for easy use.
Chemical Weed Control. Herbicides are chemicals that kill or alter the normal growth of weeds. They can be divided into two main groups: selective and nonselective. Selective herbicides are those that control the target weed(s) without damaging desirable turfgrass species.Nonselective herbicides kill all vegetation (including turfgrasses) and are used in lawn renovation or on weeds not controlled by selective herbicides.elective herbicides are those that control the target weed(s) without damaging desirable turfgrass species. Nonselective herbicides kill all vegetation (including turfgrasses) and are used in lawn renovation or on weeds not controlled by selective herbicides.