Sulfuric acid rain effects on crop yield and foliar injury /

Mode of access: Internet.

Kenaf leaf development and stem height : index of crop yield in the United States /

Data collected 1961-69.

Root behavior and crop yield under irrigation,

Mode of access: Internet.

Oats in Minnesota, acreage, yield, production by counties, 1921-1959.

Mode of access: Internet.

Corn: acreage, yield, and production of all corn, corn for grain, corn for silage, and acreage for forage, by States, 1866-1943.

Cover title.

Sweetpotatoes, estimated in hundredweight : by states, 1868-1953 : acreage, yield, production, price, value, farm disposition /

Mode of access: Internet.

Corn and soybeans, acreage, yield, and production, Illinois by counties /

Description based on: 1967; title from caption.