soil characteristics, 24, 25.
soil temperature, 57, 60.
starch in leaf, 111.
stems carry sap, 122.
stems store food, 124.
transpiration, the fact, 109.
transpiration, amount, 111.
use of cotyledons, 79.
what becomes of water taken by roots, 39.


Fallow, bare, 100.

Fall plowing, 99.

Families of plants, 86.

Farm drainage, 235.

Farm manures, 171, 183.
classification of, 171.
importance of, 172.

Farmer deals with agents, laws and forces, 5.

Fat in plants, 64.

Fermentation of manures, 174.

Fertile soil, a, 141.