1. Relating to, used in, or promoting agriculture or farming: Such examples include agricultural engineering, modern agricultural or farming methods, agricultural or farm equipment, and an agricultural college.
2. A reference to rural matters: In class June learned about agrarian or agricultural societies and farming communities.

A chemical compound used as an aid to agriculture; agrochemical: Agricultural chemicals include fertilizers, soil conditioners, insecticides, and herbicides.

The study of chemical substances for agricultural purposes: Agricultural chemistry is the science dealing with the enrichment of the soil, destruction of insect pests, and the control of plant and animal diseases.

The various forms of energy involved in the process of agriculture: Agricultural energetics can refer either to inputs (for example, human labor, animal power, electricity, etc.) or to useful outputs (such as food, manure, etc.).

Specifically, agricultural energetics concern the relationship between energy in the form of food produced and the energy input required to achieve this production.

The use of geology in agricultural applications: Agricultural geology is used in relation to the nature, formation, and distribution of soils.

Lime (calcium oxide, CaO) which is used as a soil conditioner; Agricultural lime is used as a soil improver and reduces the acidity of the soil.

The principles and use of mechanics for agricultural purposes; Agricultural mechanics deal with the development of agricultural equipment,including automated feed mixers.

The use of meteorological information for agricultural purposes: Agricultural meteorology is used in the protection of crops from a predicted frost.

The substance that remains after agricultural products have been harvested or obtained: Agricultural residue can be used as a fuel source composed of plant parts, primarily stalks and leaves, that are not harvested for use as food or fiber, for example, corn stalks and husks, wheat straw, or rice straw.

A term for the period in history beginning shortly before the Industrial Revolution: Mrs. Lawson taught her students about the Agricultural Revolution when significant improvements in agricultural production were achieved through such means as land reform, crop rotation, livestock improvements, and innovations in technology, for example, improved plows.

A broad, multidisciplinary area in the study of agriculture: The field of agricultural science encompasses the parts of exact, natural, economic, and social sciences which are used in the practice and understanding of agriculture.

The scientific studies of all aspects of farm production: Agricultural scientific studies includie soil management, crop production, animal husbandry, and the processing and marketing of farm products.

Referring to a time in the past when people did not have the systems of producing food products for others: In anthropology, the pre-agricultural period was the time before a society of people had developed the raising of crops as a means of subsistence to sell to stores.