Chapter IX

Animal Manures—Their relative value and mode of
Action—Difference between Animal and Vegetable
Manures—Cause of this difference—Mineral Manures
—Nitrates of Potash and Soda—Sulphate of Soda,
Gypsum, Chalk, and Quicklime—Chemical action of
these Manures—Artificial Manures—Burning and
Irrigation of the Soil—Planting and laying down
to grass.

The animal substances employed as manure consist chiefly of the flesh, blood, bones, horns, and hair of animals, of fish—which in some places are found in sufficient quantity to be laid upon the land—and of the solid and liquid excrements of animals and birds.