Ensilage: green foods preserved in a silo.
Evaporate: to pass off in vapor, as a fluid often does; to change from a solid or liquid state into vapor, usually by heat.
Exhaustion: the state in which strength, power, and force have been lost. When applied to land, the word means that land has lost its power to produce well.
Fermentation: a chemical change produced by bacteria, yeast, etc. A common example of fermentation is the change of cider into vinegar.
Fertility: the state of being fruitful. Land is said to be fertile when it produces well.
Fertilization: the act which follows pollination and enables a flower to produce seed.
Fetlock: the long-haired cushion on the back side of a horse's leg just above the hoof.
Fiber: any fine, slender thread or threadlike substance, as the rootlets of plants or the lint of cotton.
Filter: to purify a liquid, as water, by causing it to pass through some substance, as paper, cloth, screens, etc.
Formalin: a forty per cent solution of a chemical known as formaldehyde. Formalin is used to kill fungi, bacteria, etc.