Water gravity, also known as free water, is an important concept to understand when it comes to irrigation and soil moisture. This type of water fills the pores or voids of soil temporarily and then seeps into deeper layers of the soil due to the influence of gravity. This water is not held in place by soil particles and can easily move through the soil profile.

When it comes to irrigation, understanding soil moisture is crucial. One important concept to understand is saturation, which is the state in which soil holds the maximum amount of water it can hold. When soil is saturated, all of its pores and spaces are filled with water, and no more water can be absorbed. This can lead to waterlogging and poor drainage, which can damage plants and make it difficult for roots to access oxygen.

In today's world, water conservation is more important than ever. With increasing population and urbanization, the demand for water is skyrocketing, and it's vital that we find ways to use water more efficiently. One way to do this is by using an irrigation system that is customized to the specific needs of your plants and soil.

Soil moisture refers to the amount of water present in the soil. It is a measure of the water content of soil and can be expressed as a percentage of the soil's water-holding capacity.