Fertilizer is a substance added to soil to improve plants' growth and yield. First used by ancient farmers, fertilizer technology developed as the chemical needs of growing plants were discovered.
Mulch conserves water, prevents weeds and feeds the soil. Mulch can be any material, such as wood chips, grass clippings, leaves and compost, even rock, newspaper or shredded tires, that is spread over the surface of soil to retain water and inhibit weed growthcan be used as mulch.
Lawns are three times more productive at producing oxygen than trees. Also, an average lawn absorbs 10 times more water on a sunny day than it does on a cloudy day.