SINGLE-STALK COTTON CULTUEE AT SAN ANTONIO. 13 



Table V shows that the range in percentage of 5-locked bolls in 

 wide-spaced rows was from 47 to 72, with an average of 56, while in 

 single-stalk rows the range was from 43 to 61 per cent, with an average 

 of 46 per cent. 



The production of a higher percentage of 4-locked bolls in single- 

 stalk rows need not be considered an undesirable feature, since 4- 

 locked bolls are more readily picked and the lint in them is fully as 

 good as that in 5-locked bolls. The number of 3-locked bolls is 



insignificant. 



SIZE OF BOLLS. 



A comparison of the size of bolls was obtained by weighing 25 

 4-locked and 25 5-locked bolls from wide-spaced and single-stalk 

 rows. The 4-locked bolls from single-stalk and wide-spaced rows 

 weighed 5.04 and 5.32 grams, respectively, a difference of 0.28 gram. 

 The weights of the 5-locked bolls were 5.64 and 6.2 grams for single- 

 stalk and wide-spaced rows, respectively, the difference being 0.56 

 gram. Bolls from wide-spaced rows in both 4 and 5 locked samples 

 weighed slightly more than those from single-stalk rows. In other 

 words, 19 4-locked bolls from single-stalk rows have the same weight 

 as 18 4-locked bolls from wide-spaced rows, and 11 5-locked bolls from 

 single-stalk rows equal 10 5-locked bolls from wide-spaced rows. 

 Five-locked bolls weighed from 0.6 to 0.8 of a gram more than 4-locked 

 bolls. A slight reduction in the size of the bolls may be looked upon 

 as a necessary consequence of producing a larger crop under the con- 

 ditions of drought that ruled during the period of development of the 



bolls. 



FORMS OF ROWS. 



It has been previously shown that plants in wide-spaced rows de- 

 veloped more vegetative branches at the base than plants in single- 

 stalk rows. The vegetative branches spread out from the base of the 

 plants in the wide-spaced rows, forming rows that in cross section 

 were broader near the ground than near the top of the plants. 



Few plants in single-stalk rows had vegetative branches, so that 

 the plants were made up of main stalks only. These grew erect and 

 formed a narrow hedgelike row early in the season. Later, however, 

 as the plants became taller, they leaned to one side or the other, 

 making the rows broader at the top than near the ground. A cross 

 section of a single-stalk row resembled an inverted cone or pyramid. 

 This feature is clearly illustrated in Plate I, which shows an end view 

 of a single-stalk row of Blackseed cotton. The contrast in form be- 

 tween the single-stalk and the wide-spaced rows is illustrated in 

 Plates III and IV. At the end of the season the plants in the single- 

 stalk rows were more than 6 inches taller than those in the wide- 

 spaced rows, being 3.96 and 3.36 feet in height, respectively. 



