resigned as foreman March 30 and was succeeded May 1 by Mr. Carl Clark, a 1916 graduate of the University of Arizona College of Agriculture.

The summer and fall of 1920 were unusually dry, and the winter of 1920-21 and the spring of 1921 have likewise been below normal in the amount of precipitation. Consequently, we are starting the cropping season of 1921 under unfavorable conditions. However, the ground has been carefully worked and sufficient moisture has been stored to enable us to secure good stands of all crops planted, and with a normal summer rainfall we expect average returns for the present year.

Silage produced and stored in the fall of 1920 was not used for stock feeding experiments because of the high price of feeder cattle and the probability of low markets later. The silage was sold to a neighboring rancher.

II. A CONTINUATION OF STUDIES AT THE SULPHUR SPRING VALLEY DRY-FARM

The growing season of 1920 was the most severe one experienced in Sulphur Spring Valley since the establishment of the Experiment Farm there. No grain yields of consequence were secured from any of the plantings made in 1920, and not more than 25 tons of silage were stored. Due to shortage of feed, no stock feeding experiments were conducted in the winter of 1920-21. In 1920, even tepary beans failed to make a satisfactory growth, which was the first failure of this crop recorded in Sulphur Spring Valley.

Conditions in the spring of 1921 have not improved over those of 1920. Dry-farm fields do not have sufficient moisture to cause germination of newly planted crops, consequently only those fields that are supplied with some irrigation water have been planted.

III. LEGUMES AND THEIR CULTURE FOR SOUTHWEST CONDITIONS

As in the previous year, plantings under this project were made on the five farms of the Experiment Station. These plantings covered experiments with velvet beans, soybeans, tepary beans, cowpeas, vetch, and a few miscellaneous crops. On the Salt River Valley Farm purple vetch made a larger and more satisfactory growth than any other variety, but it failed to set a good crop of seed. Hairy vetch made a very satisfactory growth and produced a considerable quantity of seed. Woollypodded vetch made the third largest growth and produced a reasonable amount of seed. Bitter vetch, which in other years

has been quite promising, did not make as satisfactory a growth as in 1920, although it yielded a good crop of seed. Bitter vetch planted with barley competed with it to such an extent that the barley crop was reduced materially.

Cowpeas planted in midsummer in Mexican June corn made an excellent growth and can be relied upon to increase the value of the corn crop for either silage or pasture.

Inoculation tests with cowpeas gave no conclusive results. The vegetative growth of a number of varieties of soybeans was satisfactory, but the beans produced were very poor in quality, being shriveled and unmarketable. At the present time we are cooperating with the United States Forage Crop Office in making varietal tests of about twenty varieties of soybeans, and also in making tests with four of these varieties to determine the best time for planting. Plantings have been made at intervals of two weeks, beginning April 1, and continuing until August 15. This test is preliminary to a more extensive one for next year, which, we hope, will enable us to determine the causes of previous failures with soybeans and perhaps will give information that will finally lead to the successful handling of this crop under southern Arizona conditions.

Velvet beans did not prove satisfactory, due largely to the extreme difficulty in securing stands. Examination failed to show nodules on the roots of the velvet beans and it is possible that inoculation will be necessary to produce satisfactory growth.

Tepary beans proved a most excellent green manure crop for the Salt River and Yuma valleys. These beans, planted at the rate of one bushel to the acre, grew eighteen to twenty-four inches high and the yield was estimated at twelve to fifteen tons weight per acre.

IV. A STUDY OF THE VARIETIES AND METHODS OF CULTIVATION OF INDIAN CORN AND THE VARIOUS SORGHUMS

Of the various sorghums tested in 1920 hegari proved the most valuable from the standpoint of feed. Milo gave a slightly larger yield of threshed grain, but, because of greater fodder value, hegari is better liked by the average farmer. Feterita proved considerably inferior to either milo or hegari, and white milo proved a little inferior to ordinary dwarf yellow milo.

Sumac sorghum made an excellent silage crop, being slightly superior in leafiness to Orange sorghum, and because it is lighter and more easily handled, it is more satisfactory for silage than either Gooseneck or Honeydrip; these two latter varieties, however, will give larger tonnage.

Mexican June corn, or selections of it, proved superior to other varieties of corn, particularly in the Salt River Valley. V. THE CULTIVATION AND FIELD MANAGEMENT OF EGYPTIAN COTTON This project has been carried almost entirely on the Salt River Valley Farm near Mesa. In the fertilizer tests the following results were secured:

Yield in pounds of seed cotton

per acre 1076

1005

300 lbs.

875

250 lbs.

893

500 lbs. and

200 lbs.

1225

Acid phosphate
Acid phosphate

cottonseed meal

In the date of planting tests, cotton planted March 1 and March 15, 1921, was frozen and killed, and, as in previous years, it seemed that the best period for planting was during the last ten days of March or the first ten days of April. In the spring of 1921, cotton planted March 1 and 15 was seriously injured by frost, but enough plants were left to give a moderately good stand, and on June 30 the cotton of these plantings is showing a considerable amount of bloom and is in good condition.

VI.

CULTIVATION AND MANAGEMENT OF WINTER AND SPRING
GRAINS, INCLUDING WHEAT, BARLEY, OATS, AND RYE

The major part of this work has been done on the Salt River Valley Farm, although some experiments have been conducted on the Sulphur Spring Valley Dry-Farm. Yields for 1921 have not yet been obtained from the latter farm; these will not be very encouraging, due to extremely dry conditions during the growing season. At the Salt River Valley Farm work with wheat included fertility tests, rate of planting tests, and varietal tests with the following results for the harvest season of 1921:

The barley experiments included varietal tests, barley planted with vetch, and rotation and nurse crops as follows:

One plot was

Two one-acre plots were planted to rye. seeded with Abruzzes rye, which is a variety adapted to southern conditions. This acre yielded 816 pounds of threshed grain. The other plot was planted to Rosen rye, a variety bred in Michigan and not adapted to southern Arizona; the yield of this plot was but 153 pounds of threshed grain.

One and one-quarter acres of Texas Red oats were planted, which yielded at the rate of 1856 pounds of threshed grain per

acre.