172 



Physics of the Soil. 



The interval during this experiment was one of very 

 little evaporation and the adjacent untreated ground gained 

 1.21 Ibs. per sq. ft. in the same depth. This amount and 

 the water added deducted from the gain in the treated area 

 leaves the translocation 



6.23 -(1.21+ 1.33) = 3. 69 Ibs. per sq. ft. 



200. Farmyard Manure May Strengthen Capillary Rise of 

 Soil Moisture. When a soil is treated with farmyard ma- 

 nure which has become well incorporated with it, it has 

 the effect of causing a stronger rise of the deeper soil 

 moisture into the surface three feet, where it is most 

 needed in the production of crops. The table which fol- 

 lows shows the mean results of experiments aiming to 

 measure this effect during three years. 



Table showing effect of farmyard manure in strengthening the 

 capillary rise of soil moisture. 



It is seen here that the surface three feet have in some 

 way been maintained more moist, and apparently by the 

 manure, at the expense of moisture from below. 



