An Agricultural testament /
Howard, Albert, Sir, 1873-1947.
An Agricultural testament / by Sir Albert Howard. - New York : Oxford University Press, 1943. - xv, 253 p. : ill.
Waste products.
Fertilizers.
Humus.
An Agricultural testament / by Sir Albert Howard. - New York : Oxford University Press, 1943. - xv, 253 p. : ill.
Waste products.
Fertilizers.
Humus.