36 



EXPERIMENT STATION RECORD, 



On a second farm similar experiments were made with kainit and 

 lime singly and combined, manuie, and straw. One plat was snbsoiled. 

 The results were vitiated by injury from frost, but confirm in general 

 those of the other experiments. 



"The results of the field work show that there are satisfactory methods of tempo- 

 rary improvement — methods that are easily ai)plied and that are exceedingly j)rofit- 

 ahle from a commercial standpoint. 



"While there is reason to believe that the effects of this temporary improvement 

 may extend over a number of seasons, . . . permanent improvement of such lands 

 must be effected by eflicient drainage." 



Soil temperature and water, C. Flammaeion {Bid. Min. Agr. 

 France., 50 {1896), No. 5, ;pp. 262-268).— This is a part of the report of 

 the station of agricultural climatology at Juvisy, France. Observations 

 on the temperature of the soil at the surface and at depths of 0.05, 0.10, 

 0.25, 0.50, and 1 meter are briefly summarized in tables and charts. In 

 winter the highest temperature was observed at a depth of 1 meter, the 

 lowest at a depth of 0.05 meter. A similar diurnal variation was also 

 observed. In March and Aj)ril the conditions were reversed, the soil 

 being warmer at the surface than at a depth of 1 meter, and this 

 remained the case until autumn. The average for the year shows that 

 the temperature of the soil was lowest at 0.10 meter and increased uj) 

 to 0.50 meter, where it was practically the same as at 1 meter. 



The depth and temperature of the water in 2 drainage wells near 

 together, one 13.56 meters deep and tbe other 11.08 meters deep, 

 were observed. There was considerable variation in the temperature, 

 depth, and chemical composition of the water in the 2 wells. The dif 

 ference in temperature and depth was on an average 0.5° 0. and 

 about 1.5 meter, respectively. The temperature of the soil water was 

 very uniform throughout the year at a depth of 14 meters, being but 

 slightly affected by the weather, except during a very cold period in 

 February. 



Soil temperatures, J. D. Conley {Wyoming Sta. Bui. 27, pp. 12, 19, 

 28). — The soil thermometer used is described and a summary is given 

 of observations at Laramie, Wyoming, since 1891 at depths of from 

 3 to 72 in. 



In 1895 the mean temperature of the air was 37.9°, at 3 in. 43.7°, at 

 6 in. 44.40, at 12 in. 44.2°, at 24 in. 44.5°, at 36 in. 44.5°, at 72 in. 45°. 

 The following are the mean soil temperatures for the past' four and a 

 half years: 



Mean soil temperatures from July 5, 1891, to December 31, 1895. 



