.62424 Grass.

.629 Miscellaneous.

.63 Culture.

.630 General.

.631 Fruit.
.6311 Sod.
.6312 Mulch.

.6313 Tillage.
.63131 Clean.

.63132 Cover crops.
.63133 Green manures.
.63134 Shade crops.
.63135 Intercrops.
.6314 Irrigation.

.632 Nut.

.6321 Tillage.

.63211 Clean.

.63212 Green manure.
.63213 Cover crops.
.63214 Intercrops.
.6322 Irrigation.
.6323 Native grove.

.633 Vegetable.

.6331 In open.
.63311 Tillage.
.63312 Mulch.
,63313 Irrigation.
.6332 Under glass.
.63321 Tillage.

.63322 Irrigation.
.63323 Ventilation.

.634 Ornamental.

.6341 In open.
.63411 Tillage.

.63412 Mulch.
63413 Irrigation.

.6342 Under glass.
.63421 Tillage.
.63422 Irrigation.
.63423 Ventilation.1.

.639 Miscellaneous.

.64 Pruning, training, and thinning.

.65

.641 Fruit.

.6411 Tree.

.6412 Small.

.6413 Grape.

.642 Nut.

.643 Vegetable.

.644 Ornamental.

.6441 Tree.

.6442 Shrub.

.6443 Vine.

.6444 Herbaceous.

.6445 Lawns.

.649 Miscellaneous.

Crop protection.

.650 General.

.651 Materials.
.6511 Sprays.
.6512 Dusts.
.6513

Fumigants.

U. S. D. A.-10-1-26

12623°-27-44

685

12.1

HORTICULTURE

GENERAL

The products of American horticulture, including fruits, nuts, and vegetables, but exclusive of ornamentals havé an annual valuation of approximately $2,000,000,000. All fruits are valued at $700,000,000, nuts $30,000,000, and all vegetables, including home gardens, $1,270,000,000. The total farm value of all agricultural crops of the country, except timber, may during favorable years reach $12,000,000,000. Thus it appears that the value of horticultural crops is about one-sixth of the total value of all farm crops.

FRUITS

General

Apples, peaches, and pears: Total production and farm price in United States, 1910-1924

1 In recent years the commercial crop has been about one-half of the total crop.