28 



BULLETIN 1320, U. S. DEPARTMENT OF AGRICULTURE 



and the unthinned cotton. (PI. III.) The cost of production was 

 somewhat lower with the unthinned cotton, however, as the expense 

 of chopping was eliminated. 



Table 16. — Yield of seed cotton in a late-planting test at San Antonio in 1928 



Plant spacing 



Block 



Bow 



Nurr 



ber of plants 



Yield of seed cotton 

 (pounds) 



Section 

 A 



Section 

 B 



Per 

 row 



Section 

 A 



Section 

 B 



Per 

 row 





Guard— 

 1 



{ I 



1 3 



4 

 1 5 

 I 6 













14.00 



















13. 52 



Do 



276 

 320 

 325 

 246 



282 

 347 

 321 

 177 



558 

 667 

 646 

 423 



6.00 

 6.04 

 5.25 

 5.50 



4.81 

 5.62 

 5.87 

 4.62 



10.81 

 11.66 





11. 12 

 10.12 





1,167 



1,127 



2,294 



22.79 



20.92 



43.71 





Y 



f 1 



2 



1 3 



I 4 





Two plants in a hill (hills 12 inches 



157 

 196 

 181 

 149 



151 

 189 

 189 

 125 



308 

 385 

 370 



274 



5.75 

 5.75 

 6.00 

 4.25 



5.00 

 4.69 

 5.25 

 4.50 



10.75 

 10.44 

 11.25 





8.75 





683 



654 



1,337 



21.75 



19.44 



41.19 





3. 



r i 



J 2 



1 3 



I 4 







179 

 265 

 294 

 218 



191 

 307 

 281 

 216 



370 

 572 

 575 

 434 



5.00 

 6.12 

 6.49 

 5.25 



4.50 

 4.69 

 4.87 

 4.69 



9.50 

 10.81 





11.36 

 9.94 





956 



995 



1,951 



22.86 



18.75 



41.61 





¥ 



f 1 

 2 



1 3 

 I 4 





Two plants in a hill (hills 12 inches 



143 

 194 

 196 

 155 



158 

 195 

 164 

 157 



301 

 389 

 360 

 312 



5.50 

 5.20 

 5.50 

 4.62 



5.50 

 5.15 

 5.19 

 5.00 



11.00 

 10.35 

 10.69 





9.62 





688 



674 



1,362 



20.82 



20.84 



41.66 





5 



f 1 



2 



1 3 



I 4 







196 

 269 

 260 

 196 



169 

 256 

 271 

 202 



365 

 525 

 531 

 398 



4.50 

 5.62 

 6.19 

 5.62 



4.62 

 5.00 

 5.31 

 5.12 



9.12 

 10.62 





11.50 

 10.74 





921 



898 



1,819 



21.93 



20.05 



41.98 





K-- 



( 1 



2 



1 3 



I 4 





Two plants in a hill (hills 12 inches 



174 

 190 

 177 

 100 



140 

 191 

 167 

 56 



314 

 381 

 344 

 156 



5.62 

 5.00 

 5.12 

 5.00 



5.00 

 5.00 

 4.12 

 3.12 



10.62 

 10.00 

 9.24 





8.12 





641 



554 



1,195 



20.74 



17.24 



37.98 





Guard- 



f 1 

 { 2 

 I 3 

















11.50 



Unthinned 













12.00 















11.50 

















YIELDS FROM COTTON EXPERIMENTS AT SAN ANTONIO 



The yields of seed cotton obtained from the separate field of late- 

 planted cotton were greater than those from cultural and variety- 

 tests conducted at San Antonio during the same season. The yields 

 from the late-planted cotton were exceeded only by the April 19 

 planting in the successive plantings. The average row yield from 

 the late-planted test, the successive plantings, two cultural tests, 

 and the Lone Star blocks in the variety test are given in Table 17. 

 The same variety of seed was used in all these plantings. 



