WATER SOILS. 



29 



The amount of moisture found in the plats July 10 may be taken 

 as representing - the condition of the soil during the dry period. The 

 averages for this date on some of the plats are given as follows: Clover 

 plat: Spring plowed, 12.52 percent; fall plowed, subsoiled, 11.39 per 

 cent; fall plowed, not subsoiled, 9.38 percent. Oat plat (to a depth 

 of 3 ft.) : Spring plowed, 10.80 per cent; fall plowed, subsoiled, 10.87 per 

 cent; fall plowed, not subsoiled, 8.50 per cent. Barley plat: Spring- 

 plowed, 11.26 per cent; fall plowed, subsoiled, 10.36 per cent; fall 

 plowed, not subsoiled, 8.32 per cent. Beet plat : Spring plowed, 15.31 per- 

 cent; fall plowed, subsoiled, 18.05 per cent; fall plowed, not subsoiled, 

 12.09 per cent. Corn plat: Spring plowed, 15.51 per cent; fall plowed, 

 subsoiled, 16.29 per cent; fall plowed, not subsoiled, 16.23 per cent. 



"The amount of moisture present in the pasture was uniform for the 

 season when compared with the changes which take place in many of 

 the other plats. This characteristic of the blue-grass plat compares 

 favorably with the results of 1895." 



Mechanical analyses and water content of Wyoming soils, 

 C. B. Bidgaway ( Wyoming Sta.Bul. 35, pp. 159-188, pis. 5, charts 3). — 

 This is a continuation and extension of work reported in Bulletin 6 of 

 this station (E. S. R., 4, p. 23). 



The general characteristics of what were considered typical Wyoming 

 soils at the station and substations are described, with notes on natural 

 vegetation and maximum yields of different farm crops. Mechanical 

 analyses of three samples of soil with corresponding subsoil collected 

 at Wheatland, Sundance, Sheridan, Lauder, and Laramie are reported. 

 Chemical analyses of soils and subsoils from each of the above farms 

 are republished from the bulletin above referred to, and a record is 

 given of daily determinations of moisture during the period from April 

 to September on prairie sod and on cultivated (plowed and harrowed) 

 and subsoiled plats (the last two being seeded to oats) on the station 

 farm at Laramie. For purposes of comparison, observations on rainfall 

 and evaporation are also reported. 



The average results of the mechanical analyses are shown by the 

 following table : 



Mechanical analyses of Wyoming soils. 



The results of the mechanical analyses as well as of the moisture 

 determination are shown graphically. From the latter it was found 

 "that the amount of moisture in samples of the same soil, taken the same 



