Soil Water. How much Nitrogen is in the Air above one acre?. There are 69,155,856 pounds of nitrogen in the air above an acre. Why is water important to plants?. it is a nutrient serves as a solvent for other nutrients. What are the water requirements for plants?.
There are 69,155,856 pounds of nitrogen in the air above an acre.
1) Hygroscopic Water is held so strongly by the soil particles (adhesion), that it is not available to the plants
2) Capillary Water is held by cohesive forces greater than gravity and is available to plants
3) Gravitational Water is that water which cannot be held against gravity