. The work of the Yuma Reclamation Project Experiment Farm in 1919 and 1920 . vided for some special experiments ipresentativea of other offices of the Bureau of riant Industry. Yuma Experiment Farm in 1919 and 1920. 15 COTTON.* VARIETY TESTS. Beginning with the year 1916 there has been conducted at this sta-tion a test of most of the cotton varieties which are commerciallyimportant in the United States. Only small lots of seed are obtainedfor this work, and while these tests are made on small plats and are FED C B A 3 SORGHUM 4 NURSERY 5M/LLET6 VARIETIES 7 WHEAT6SUPAN0RA5S 9 BEANS NA I 4ZMESQ
. The work of the Yuma Reclamation Project Experiment Farm in 1919 and 1920 . vided for some special experiments ipresentativea of other offices of the Bureau of riant Industry. Yuma Experiment Farm in 1919 and 1920. 15 COTTON.* VARIETY TESTS. Beginning with the year 1916 there has been conducted at this sta-tion a test of most of the cotton varieties which are commerciallyimportant in the United States. Only small lots of seed are obtainedfor this work, and while these tests are made on small plats and are FED C B A 3 SORGHUM 4 NURSERY 5M/LLET6 VARIETIES 7 WHEAT6SUPAN0RA5S 9 BEANS NA I 4ZMESQUITE 43KEKCHL- 44 COTTON ± pt r* f^ £ M m is 16 19 s 21 m 24 m 25 26 P 29 K& 32 X im 34 35 * £ w 39 m § g £ * £ 5 SORGHUM *& w /£ 2 tP /^POMEGRANATES 20 2i 22 23 24 Q fizfl g 25 20 27 ^ £ ?d g />£>W \» 31 SOY BEANS 32 COTTON 33 wm 39 40 mi rigg ^ £L 4* 4E ¥ >o iZ P /£ AL &. /7 /<5 KAOLIANG 19 VELVET 20 BEANS 21 MELONS 22 zr 24 25 26 27 90 f gg S^ 1? J/ .32 g_s fy ffc 5 & •m MIS \ ° 2 I /2-I Tf 9 7 6\S\*7\6\s\-*\3 g WIS 2 I5I\. EUCALYPTUS Fig. 2.—Diagram showing the arrangement of the fields and the location of the experi-ments at the Yuma Experiment Farm in 1919. not grown in duplicate the results afford a comparison from yearto year. The plantings are usually made during the first week inApril in rows 14 inches apart and the plants thinned to approxi-mately 12 to 14 inches in the row. In 1918 all the varieties grown the previous year were ratoonedand the results compared with the usual spring plantings. * The investigational work with cotton in 1919 was carried on cooperatively with theOffice of Crop Acclimatization, Bureau of Plant Industry. The service of D. M. Simp-son, representing that office, is acknowledged in assembling the results. 16 Department Circular 221, U. S. Dept. of Agriculture. The yields of seed cotton per acre for each variety during the5-year period from 1916 to 1920 are shown in Table 6. An additional test was made in 191
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