220 NATURE AND PROPERTIES OF SOILS 



moisture. The following figures ^ are representative of the 

 data available regarding these points : 



Table XLIV 

 moisture content of bare ibrigated and dry-land plots^ 



TREATED IN VARIOUS WAYS, EXPRESSED IN TOTAL INCHES OP 

 WATER IN UPPER 6 FEET OP SOIL. GARDEN CITY, 



KANSAS, 1914. 





Irrigated 



Det Land 



Teeatment 



MAR. 30 



SEPT. 16 



GAIN OK 

 LOSS 



MAE. 30 



SEPT. 16 



GAIN OE 

 LOSS 



64nch mulch . . . 

 3-ineh mulch .... 

 Bare surface .... 

 "Weeds 



17.6 

 18.1 



17.8 

 16.4 



15.9 



16.6 



15.6 



9.1 



1.7 



15 



2.2 



—7.3 



11.8 

 11.3 

 11.5 



1Q.8 



12.4 



11.7 



12.0 



8.0 



+ -6 

 + -4 



+ -5 

 2.8 



Table XLV 



effects op various methods of tillage on the yield op corn 



and the average percentage op moisture in the soil 



to a depth of 40 inches. average op 8 years ' 



test at the university of illinois.^ 



mean rainfall, 33.7 inches. 



Treatment 



Yield of Corn 

 Bushels 

 Per Acre 



Average 



Percentage 



OF Moisture 



IN Soil 



Not plowed or cultivated : 



Kept bare of weeds only.... 

 Plowed and seedbed prepared : 



Kept bare of weeds only 



Weeds allowed to grow 



Three shallow cultivations .... 



31.4 



45.9 



7.3 



39.2 



23.1 



22,3 



21.8 

 21.9 



^Oall, L. E., and Sewell^ M. C, The Soil Mulch; Jour. Amer. Soc. 

 Agron., YoL 9, No. 2, pp. 49 61, Peb , 1917. 



* Hosier, J. Q., and Gustafson, A. P., Soil Moisture and Tillage for 

 Com; lU. Agr. Exp. Sta., BuL 181, Apr., 1915. 



