12 
BULLETIN" 157, U. S. DEPARTMENT OF AGRICULTURE. 
in the fall of 1909. Since this time the plats have been alternately 
fallowed and cropped to winter wheat, receiving uniform treatment 
in every case except in the depth of plowing. They were replowed 
or double disked each year in order to destroy weeds and volunteer 
grain. 
The depth of plowing on the different plats in the fall of 1908, 1910, 
and 1912 was as follows: 16A, subsoiled, 18 inches; 17A, subsoiled, 
15 inches; 18A, plowed, 10 inches; 19A, plowed, 5 inches. The 
depth of plowing on the different plats in the fall of 1909, 1911, and 
1913 was as follows; 16C, subsoiled, 18 inches; 17C, subsoiled, 15 
inches; 18C, plowed, 10 inches; 19C, plowed, 5 inches. 
Table IV. — Annual and average percentages of moisture for each of the first 6 feet of 
soil in plats plowed to different depths at the Nephi substation, samples taken in April, 
June, and September, for the years 1909 to 1912, inclusive. 
SUBSOILED IS INCHES DEEP. 
Date of determination. 
Depth of sampling. 
1909 
1910 
lfoot.. 
2 feet . . 
3 feet . . 
4 feet.. 
5 feet . . 
6 feet.. 
Average . 
17.3 
21. 35 
19. 55 
19. 45 
19.50 
20.22 
18.05 20.35 13.13 
20.40 20.7019.48 
19. 55120. 70 19. 33 
19. 00;19.95 18. 3S 
IS. 65 19. 15 17.83 
13. 05 
19.80 
16. 53 
19.50 
20.45 
15.20 
;20. .53 
19.5; 
20. 60 20. 03 
I 
19.38 
20.15 
Is. 75 
17.82 
17. 65 13. 19 
17.8.3 14. 72 
18.9316.58 
17. 30 16. 61 
14. &3 
18.41 
16.90 
14.63 
15.51 
17.79 
15. 95 
17.79 
18.17 
17.08 
16.30 
17.46 
20.99 
21.71 
18.61 
12.95 
13. 35 
12.47 
18.89 
20. 9s 
19. 60 
16. 65 
20.71 
18.51 s 21.07 
17.3848.94 
14.981 13.52 
,3547.12 
16.68 
14. 64110. 48 16. 57 
17. 
18.11 
15.9117.15 
14. 49 18. 49 
16.06 
20.06 
18.85 
17.2 
16.8 
18. 66 
17.96 
14.18 
19.13 
17.91 
17.18 
15.82 
18.23 
17.07 
SXJBSOrLED 15 ESTCHES DEEP. 
. 21. 6248. 20118. 0020. 27 14. 35 14. 30120. 73 16. 75 18. 20 26. 9446. 97113. 82 22. 39116. 58 16. 08 
. !22. 40 20. 80119. 70 21. 23 18. 60 20. 25 21. 0249. 68 19. 66 21. 50 20. 30 19. 60 21. 54 19. 85 19. 80 
. i20. 65 19. 60 19. 75 20.5748. 78 18. 40|l6. 70 13. 47 19. 5048. 8546. 57;18. 37 19. 14|17. 11 19. 01 
. 20. 20 19. 15 19. 55 19. 6347. 70 17. 60 15. 93J18. 3847. 98 17. 51 17. 5845. 9118. 3248. 20 17. 76 
. 48. 5048. 3048. 90 17. 75 17. 65 17. 28 14. 81jl5. 20 15. 71 12. 70 13. 52 13. 00 15. 94:16. 1746. 22 
. 119. 90 21. 35 20. 25 20. 15 19. 65 18. 90 18. 20 19. 11 19. 22 18. 25 19. 01:16. 11 19. 1349. 78 18. 62 
1 foot. 
2 feet. 
3 feet . 
4 feet. 
5 feet . 
6 feet. 
20.5449.5719.3619.93 
17.7917.7917.90 
17.1018.38 
19.29 
17.33 16.14 
19.4117.95 17. 
PLOWED 10 INCHES DEEP. 
1 foot 
2 feet 
3 feet 
4 feet.... 
5 feet 
6 feet 
Average 
21. 63 16. 40 17. 70 20. 95 
122.45 21. 05 20. 00 21. 97 
21.45 19.8049.65 20.82 
20. 35 18. 85 18. 40 19. 92 
20.32 18.2045.95 20.90 
20. 67 20. 60 18. 90 21. 52 
14. 98 15. 35 20. 
18. 70 20. 45 
19. 25 18. 68 
17.80J17.88 
18. 10 17. 75 
18. 88 18. 88 
18. 20 20. 83 
17.8449.89 
14.4617.15 
15.8046.14 
17.9948.43 
21. 14 19. 15 18. 43 21. 01 17. 95 IS. 17 17. 53 18. 37 18. 14 17. 19 16. 97 15. 92 19. 22 18. 11 
16. 39 22. 12 18. 23 13. 9121. 40 16. 85 
10 
40 
30 
42 
61 
20. 0321. 9049. 8348. 63 21. 13 20. 
19. 63i20. 4018. 64 IS. 09 20. 13 19. 
18. 45 
17.08 
17.27 
14.67 
11. 35 
12.70 
15. 38 
13. 22 
16.51 
15.72 
13.55 
15. 
.35 17. 
.0946. 
18.2248. 
15. 84 
19.78 
19.01 
17.61 
16.08 
17.66 
17.66 
PLOTTED O INCHES DEEP. 
lfoot... 
2 feet . . . 
3 feet... 
4feet... 
5 feet . . 
6 feet . . 
Average . 
21. 65 
21. 85 
21.20 
20.30 
19. 55 
20.00 
15.10 
20.40 
19. 35 
18.50 
17.92 
18. 95 
20.7618.3; 
> 20. 90!l5. 65)14. 83j20. 904 
17. 50122. 40 
19. 55 24. 07 
19. 44 19. 07 
IS. 70 21. 3049. 9849. 88 21. 38 20. 54 
19. 00 19. 08;17. 30 18. 5017. 4S19. 17 
18. 6018. 23 16. 6S 18. 1343. 1247. 26|17. 59 14. 25 
18. 00 19. 05 18. 93 19. 73 14. 78 15. 59 17. 20 16. 42 
19. 7046. 35 15. 93 15. 50 15. 2346- 59 17. 19 16. 20 
17. 15 17. 85 IS. OS 18. 74 17. 
18.73 
19.40 
18.22 
16.29 
17.65 
15. 65 
15. 20 21. 46 
20. 48|22. 15 
20.1719.21 
18.1546.33 
18.5617.30 
14.7546.95 
16.85 
20.08 
18.51 
17.18 
16.15 
19.65 
19.28 
18.12 
17. 52 18. 37 
16. 78 16. 79 
17. 89 18. 90 17. 82 
