Bulletin 1356, U. S. Department of Agriculture 
minimum, and average monthly wind Telocity at the Kice Experi- 
ment Station. Crowley. La., for the 14-year period from 1910 to 1923, 
inclusive, is given in Table 5. 
EVAPORATION 
Evaporation is not an important climatic factor in a region of 
large seasonal precipitation. Data on evaporation recorded at the 
Kice Experiment Station are given in Table 6. These data show 
that during the 11-year period from 1910 to 1923. inclusive, the 
greatest evaporation occurred in May. June, July, and August. 
During this 1-month period the mean monthly temperatures ranged 
from fl : to 82° F. and the average monthly wind velocity from 1.8 
to 3.2 miles per hour. Evaporation exceeded precipitation only in 
March, April. May. June, and September. The average annual 
evaporation was 8.19 inches less than the average annual precipita- 
tion. 
Table G— Monthly, average monthly, average daily, annual, and average an- 
nual evaporation from a free water surface at the Rice Experiment Station, 
Crowley, La., for the 14-year period from 1910 to 1923, inclusive 
[Data in inches] 
Year 
Jan. ■ Feb. 
Mar. 
Apr. 
May 
June 
July 1 
Aug. 
Sept. 
Oct. 
Xov. 
^•jn^i 
1910 
1. 745 2. 685! 
3.269 
5.656 
5.862 
5. 772 
6.887 
5.925 
5.716 
6.835 
5.839 
6.304 
7.651 
6.695 
4. 587 
4.946 
5.714 
5.305 
5.290 
5.544 
5. 552 
5.080 
5.424 
6.123 
6.609 
5. 733 
6.022 
6.791 
5. 245 
4. 3S8 
4.946 
5.610 
4. S97 
5.394 
5.417 
5.750 
5.344 
4.420 
5.972 
5.208 
5.647 
5.709 
5.409 
5.522 
6.501 
5.832 
5. 345 
4.580 
4. 139 
4.170 
3.777 
5. 145 
4.876 
5.092 
4.835 
5.276 
5.105 
5.253 
4.110 
4.652 
4.369 
4.306 
4.388 
4.004 
4.093 
3.506 
3.883 
5.220 
4.516 
3.794 
3.754 
3.097 
3.371 
4.649 
4.328 
2.668 
2. 405 49. S86 
1911 
1.406 2.892 
3.951 5.824 5.310 
3.305 4.030 5.694 
3.010 5.065 5.973 
2. S15 3.981 5.237 
3. 4S9 4.668 5.953 
4. 297 4. 755 5. 7S4 
3.893 4.919i 6.533 
4. 146 4. 180 6. 136 
3.293 4.827 5.423 
2. 959 3. 174 5. 052 
3.927 4.939 6.766 
3.726 4.838 5.911 
3. 723 3. 284 5. 502 
3.102 2.882 51.750 
1912 
1913 
1914 
1915 
1916 
1917 
191S 
1919 
1920 
1.966 2.994 
1.551 2.603 
2.053 2.246 
1.306 2.425; 
2. 018 2.695! 
1.662 2.560 
2.193 2.201 
1. 4S3 2.552 
.964 2.226 
2.116 2.966 
2. 598 2.351 : 
2.133 1.867 
2.458 
2.249 
2.168 
3.240 
2.999 
2,480 
2.982 
2.932 
2.252 
2.037 
2.963 
2.581 
2. 108 47. 484 
1. 947 46. 752 
2. 411 46. 940 
2. 019 50. 279 
2. 403 52. 508 
2. 306 53. 024 
2. 198 52. 299 
2. 098 46. 708 
1. 884 41. 717 
1921 
1. 937 49. 330 
1922 
1923 
2. 875 51. 310 
1. 690 45. 009 
Average 
Average daily. 
Maximum 
Minimum 
1.S00 2.519 
. 068 . 090 
2.598 2.994 
.964 1.867 
3.557 4.581 5.795 
. 115 . 153 . 1S7 
4.297 5.S24 6.766 
2.815 3.174 5.052 
5. 962 
.199 
6. SS7 
4. 587 
5.569 5.534 
. 180 . 179 
6.791 6.501 
1388 4.420 
4.670 
.156 
5.276 
3.777 
4.065 
.131 
5. 220 
3.097 
2.651 2.226 4S.92S 
.088 .072 
3.240| 2. 882 
2.037 1.690 
CULTURAL EXPERIMENTS 
The cultural treatment of the rice crop within the limits that have 
been defined determines its commercial value. This value is de- 
pendent largely upon yields, though the quality of the rice that is 
produced Ls also a factor. 
Seed-bed preparation, seeding, soil fertility, irrigation, rotation, 
and weed control are the most important human factors affecting 
rice production. These factors are discussed in this bulletin. The 
cultural methods recommended are based on data obtained from 
experiments conducted at the Rice Experiment Station. Crowley, 
La., in cooperation with the Louisiana Agricultural Experiment 
Station during the 13-year period, 1911 to 1923. inclusive. 
