Agriculture is derived from 2 words Agri and culture.Agri means crops and culture means cultivation.so according to the name agriculture is the branch of science in which we deals about the cultivation of crops.

it is a very wide subject and have a number of branches as well some of which are as under

Agronomy

Horticulture

food sciences

Soil science

water manegment

plant breeding and genetics

Agronomy

it is branch of agriculture which deals with the study of field crops.it inculdes all the rabi and kharif crops.

Horticulture

study of garden crops is known as horticulture.

the main difference between agromony and horticulture is that agronomy deals with field crops i-e having no boundary and horticultural crops have a specific boundary.

Food science

Agricultural branch in which we study about different food materials there preparation storage and preservation

Soil science

as according to the name suggest the branch in which we study about  soil its properties and its nutrative values.

Water manegment

Study of water mangment to the crops is known as water mangment.