22 



BULLETIN 1320, U. S. DEPARTMENT OF AGRICULTURE 



PERCENTAGE OF 5-LOCK BOLLS ON EARLY AND LATE PLANTINGS AT 



SAN ANTONIO 



A feature that was found to differ in the several plantings was the 

 proportion of bolls with five locks. A record was obtained of the 

 number of locks in bolls picked from four 50-foot sections of rows in 

 the April 19, April 28, and May 5 plantings. 



Data from each planting are presented in Table 13, showing the 

 number of 4-lock and 5-lock bolls picked on August 18 and September 

 10 from two 50-foot rows on the east side of the field and two 50-foot 

 rows on the west side. As stated previously, the presence of Johnson 

 grass on the west side of the field retarded the development of the 

 plants, and lower yields were obtained than on the east side. 



The data presented in Table 13 show that a consistently higher 

 percentage of 5-lock bolls were produced on the large plants in the 

 east end of the rows. In the April 19 planting the large plants pro- 

 duced 41.2 per cent of 5-lock bolls, as compared with only 23.8 per 

 cent on the small plants. The large and small plants in the April 28 

 planting produced, respectively, 49.5 and 23.8 per cent of 5-lock bolls 

 and in the May 5 planting 50.3 and 27.6 per cent. There was little 

 difference in the percentage of 5-lock bolls produced on the small 

 plants in the first three plantings, but the percentage of these bolls 

 produced on the large plants in the May 5 planting was 9 per cent 

 higher than in the April 19 planting. 



Table 13. — Number of bolls and percentage of 5-lock bolls picked on August 18 

 and September 10 from large plants on the east end of rows and from small plants 

 on the west end of rows in the successive adjacent plantings of cotton at San 

 Antonio 





Size 



Date 

 picked 



Number of bolls 



Per- 

 centage 



Date planted, 1923 



5-lock 



4-lock 



3-lock 



Total 



of 

 5-lock 

 bolls 



Apr. 19 





/Aug. 18 

 \Sept. 10 



70 

 37 



162 

 179 



1 

 1 



233 



217 



30.0 







17.1 



Total 



107 



341 



2 



450 



23.8 







/Aug. 18 

 \Sept. 10 







146 

 105 



176 

 181 





 1 



322 

 287 



45.3 







36.6 



Total 



251 



357 



1 



609 



41.2 







/Aug. 18 

 \Sept. 10 





Apr. 28__. 



42 

 51 



87 

 207 



1 



3 



130 

 261 



32.3 







19.5 



Total 



93 



294 



4 



391 



23.8 







/Aug. 18 

 \Sept. 10 







146 

 172 



99 

 225 





 



245 

 397 



59.6 







43.3 



Total 



318 



324 







642 



49.5 







/Aug. 18 

 \Sept. 10 







36 



87 



95 

 225 







3 



131 

 315 



27.5 







27.6 



Total 



123 



320 



3 



446 



27.6 







/Aug. 18 

 \Sept. 10 







120 

 178 



70 

 224 





 1 



190 

 403 



63.2 







44.2 



Total 



298 



294 



1 



593 



50.3 











