in rotation, 226, 229, 234.
plant, 6.
pollination of, 133.
rapid growth of roots of, 13.
roots cut by plow, 14.
soils, 28, 29, 30, 161.
structure of seed, 78.
water used by, 40.

Corolla, 129.
function of, 132.

Cotton, 5, 161.
a humus waster, 221.
in rotation, 225-229.
plant, 6.
plant food removed by, 227.
Sea Island, 161.
soils, 28, 29, 161.
upland, 161.

Cotton hull ashes, 199.

Cotton-seed meal, 194.

Cotyledons, 77.
use of, 79.

Coulter of plow, 94.