Photosynthesis Grass blades are covered with tiny pores called stomata. The plant absorbs water, nutrients and minerals through the roots and uses all of these things in producing food. This process is called photosynthesis. Excess water and oxygen are then released through the pores on the grass blades. This is called transpiration, and without enough water, the cycle can slow or even stop.
Transpiration replaces oxygen and water vapor in the air.
Just 2,500 square feet of turf can produce enough oxygen to support a family of four. Soil Soil types affect how often and how long you need to water. Sandy soil absorbs water fast but can lose it just as quick. Loam soil is ideal because it has a good absorbing rate and can also hold water well. Clay soil can be hard to water because it absorbs the water very slowly.