WORK OF THE SAN ANTONIO EXPERIMENT FARM IN 1912. 



9 



and sorghum, were good. The preceding winter was one of unusual 

 severity and the amount of winter rainfall was somewhat above the 

 normal. From June 23 until late in September practically no rain 

 fell, the total precipitation for the months of July and August being 

 only 0.33 inch. This continued drought of nearly three months cut 

 the cotton crop short. The spring was late and consequently the corn 

 and other early-planted crops were somewhat late in maturing. The 

 total precipitation for the year, as measured at the farm, was 26.37 

 inches,^ which is practically the normal for this section, but somewhat 

 higher than the mean annual rainfall for the period 1907 to 1912, 

 inclusive. 



The meteorological observations at the experiment farm are made 

 in cooperation with the Biophysical Laboratory of the Bureau of 

 Plant Industry. Table I shows the summaries for 1912 compared 

 with the means for the six-year period 1907 to 1912, inclusive. 



Table I. — Summary of meteorological observations at the San Antonio Experi- 

 ment Farm, 1D07 to 1912, inclusive. 



Precipitation (Inches). 



Evaporation (Inches).^ 



Daily Wind Velocity (Miles per Hour).^ 



1911, highest.. 



1912, highest., 



1911, lowest.. 



1912, lowest.. 



1911, average. 



1912, average. 



10.4 



8.2 

 1.12 

 .77 

 5.60 

 3.16 



15.9 



11.2 



1.45 



.62 



7.02 



4.00 



9.0 



6.4 

 2.24 

 .86 

 5.20 

 3.50 



10.6 

 6.0 

 3.28 

 .84 

 6.10 

 2.68 



9.2 



5.9 



2.17 



1.22 



5.60 



3.23 



11.9 



8.4 



2.34 



1.08 



6.40 



2.92 



12.5 

 7.3 



2.82 

 1.38 

 6.86 

 4.27 



12.1 

 7.6 

 1.82 

 2.30 

 4.59 

 4.83 



6.6 



6.5 



1.98 



1.42 



3.91 



3.75 



8.5 



7.6 

 .86 

 .89 



3.76 



3.84 



9.5 

 5.7 

 1.06 

 .76 

 3.24 

 2.68 



8.0 



.97 



.81 



3.36 



2.80 



1 The rainfall in the city of San Antonio in 1912, as reported by the United States Weather Bureau, 

 was 23.7 inches, which was 3.2 inches below the normal. 



2 The evaporation measurements missing are as follows: 



1909 —April, 2 davs; June, 3 davs; July, 6 days; August, 1 day; TMoveniber, 1 day 



1910.— January, 7'days; February, 2 days; June, 3 days; July, 5 days; October, 4 days; December, 



3 days. 

 1911.— April, 1 day; July, 2 days. 



1912.— February, 2 days; April, 1 day; December, 2 days. 

 » Wind velocities are reported for the years 1911 and 1912 only. 



84899°— Cir. 120—13 2 



