344 NATURE AND PROPERTIES OF SOILS 



tion of alkali may allow such a crop to be established. Farm 

 manure has been found especially useful in this respect/ The 

 crop once well established will then maintain itself in spite of 

 the concentrations that may occur later. 



* Lipman, C. B., and Gericke, W. F., The Inhibition hy Stable Manure 

 of the Injurious Effects of AXkali Salts in Soils; Soil Sci,, Vol. VII, 

 No. 2, pp. 105-120, 1919. 



