Tree Studies:
Comparison of the values of the common varieties of shade trees, how to plant and how to take care of shade trees. (See pp. 280-2.)
The Functions of Plant Organs:
Examination of the organs of common flowers; use of root, flower organs, fruit, and seed. (See pp. 273-8.)
Economic Study of Plants:
Plants of the lawn and garden; weed studies. (See pp. 263-5, 270-3, and 278-9.)
Relation of Soil and Soil Tillage to Farm Crops:
Study of subsoils; capillarity in soils; benefits of crop rotations and mulching; experiments in fertilizing, mulching, depth of planting, and closeness of planting. (See pp. 265-7.)