Most important factor in the raising of crops, 151.

Mould board of plow, 94.

Muck, swamp, 30.

Mulch, soil, 56.
how made, 56.
to save water, 56.

Muriate of potash, 199.

Mustard, family, 86.
flower, 129, 130.

Muskmelon soils, 161.


Night shade family, 86.

Nitrates, what they are, 146.
availability of, 146, 193.
solubility of, 146.

Nitrate of soda, 193.
nitrogen, 193.

Nitric acid in soil, 146.

Nitrification, 146.