Subirrigation requires

a. an underground water source

b. a system of overhead sprinklers

c. a large flat area of land

d. a small amount of wind

Correct A.) An underground water source

The sub-irrigation is the method of watering plants from the below instead of above the ground. It is also known as seepage irrigation. In this method of irrigation water is sprayed directly to the plant root zone directly and it is directly taken up by the roots to the plants. It is an environmentally responsible alternative method that conserves water and fertilizers.

Hence, the correct answer would be option A.

the function of the protein macromolecule is to move things in and out of the cell and transport other molecules in the body. there are many functions of proteins. they are the basic building blocks of living things and are responsible for the growth and repair of body cells and tissues.

explanation:

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