Coulter-toothed harrow, 102, 104.

Cow manure, 178.
losses by exposure, 178.

Cowpeas, 68, 186.
for green manuring, 186.
plant food in, 187.
root growth of, 12.
soils for, 187.

Cropping and soil water, 159, 160.

Crops, cleansing, 232.
feeding, 232.
in rotation, 219.
manurial, 232.
money, 232.

Cucumber flower, 133.

Cultivation.
(See After-cultivation.)


Denitrification, 147.
conditions favoring, 147.

Denitrifying germs, 144, 147.