May 3i, 1924 Comparison of Pima Cotton with Upland Varieties 
951 
Table XII.— Lint and seed data of five pickings as obtained from means of 20 
samples from each picking, 1923 
Lint percentage 
Variety 
Mean 
first 
picking 
Mean 
second 
picking 
Mean 
third 
picking 
Mean 
fourth 
picking 
Mean 
fifth 
picking 
Hartsville... 
28.1-K 07 
28.Odr. 24 
31.0dr. 32 
25. 3 dr. 16 
30. Odr. 08 
28. 5rb. 08 
31. 8dr. 13 
34. 9dr. 11 
35. 4dr. 11 
26. 5dr. 15 
32. 3dr. 14 
26. 4dr. 15 
33. ldr. 18 
35. 7dr. 11 
36. 2dr. 13 
26. 7dr. 18 
29. 5dr. 17 
Durango.... 
31. 9dr. 10 
Pima..... 
28.2dr. 07 
27. 4dr. 07 
Acala..... 
34. 4±. 13 
32. 5dr. 12 
30. 9dr. 21 
32. Odb. 23 
32. 4 dr. 18 
Mebane..... 
36. Orb. 15 
35.9 dr. 10 
Lone Star..... 
36.4dr. 08 
35. 7dr. 07 
Variety 
Lint index « 
Hartsville.... 
6.37±. 04 
6.18dr. 04 
5. 59rb. 10 
5. 79rb. 05 
5. 56rb. 05 
Durango.... 
6. 27±. 04 
6. 26dr. 09 
6. Oldb. 04 
6. OOdr. 03 
5. 51dr. 05 
Pima.... .... 
5. 46±. 02 
5. 24dr. 03 
5. 50dr. 03 
4. 90rb. 06 
Acala__ 
7. 20±. 07 
6. 71dr. 03 
6. 46rb. 04 
6. 50rb. 03 
5. 75dr. 07 
Mebane...... 
8.03dt. 06 
7. 95dr. 06 
7. 38dr. 04 
7. 58dr. 07 
6.31dr. 07 
Lone Star..... 
8. 62=b. 04 
8.23dt. 06 
8. 29=b. 05 
7. 89dr. 07 
6. 71db. 09 
Variety 
Seed index & 
Hartsville..... 
16. 3dr. 10 
15. 9rb. 14 
16. 4dr. 11 
16. ldr. 10 
15. 3 dr. 09 
Durango...... 
13.4db. 12 
14. Orb. 12 
14. Orb. 10 
12. 6 dr. 10 
13. lrb. 10 
Pima____ . 
13.9dr. 04 
13. 8dr. 07 
13. 8dr. 04 
13. 7dr. 08 
Acala.... ... 
13. 7dr. 08 
13. 9dr. 08 
13. 9rb.10 
13. lrb. 09 
12. 9dr. 11 
Mebane.... 
14. 3 =fc. 07 
14. 2dr. 13 
13. 8dr. 09 
13. 8dr. 07 
13. 4dr. 06 
Lone Star... ... 
15. lit. 05 
14. 9dr. 09 
15. ldr. 09 
13. 9dr. 11 
14. Odr. 14 
° Weight of lint from 100 seeds. & Weight of 100 seeds. 
Fertile soils combined with the high temperatures which prevail over a long 
period, and the ample supplies of irrigation water which are usually available, 
often produce large, vigorous plants, with long branches and dense foliage, so 
that cultural precautions may be necessary to avoid too rapid and luxuriant 
growth. Larger yields are usually obtained from fields where the plants are 
4 or 5 feet high rather than from taller plants. For good results the growth 
must be gradual and continuous instead of rapid and intermittent. 
It is characteristic of Pima cotton to produce a strong upright central stalk 
with few vegetative branches and comparatively long fruiting branches, with 
long internodes and open foliage, which render it well adapted for conditions 
obtaining in irrigated regions (PI. 1, A). Damage seldom results from lodging 
or breaking down of the plants unless they are extremely rank and widely spaced, 
so that the vegetative branches or side stalks grow large and are weighted with 
bolls. 
The strong central stalk and upturned leaves are advantages of the Hartsville 
variety, though many growers would not consider an Upland cotton with a low 
percentage of lint (PI. 1, B). 
Durango, because of its upright habit of growth and strong, stiff central stalk, 
and rather narrow, deeply lobed leaves, has some advantages over the lower and 
more compact types of Upland cottons for growing under irrigation conditions 
(PI. 1, C). Though over-rank Durango fields may be badly tangled, they are 
seldom lodged as flat on the ground as the Texas big-boll varieties. A tendency 
to excessive shedding under adverse conditions is responsible for occasional low 
yields as in the season of 1921 at Sacaton. 
