338 



NATURE AND PROPERTIES OF SOILS 



Table LXXVIII 



Crop 



Grapes. . . . 

 Oranges . . . 



Pears 



Apples. . . . 

 Peaches. . . 



Rye 



Barley .... 

 Sugar Beet 

 Sorghum . . 

 Alfalfa.... 

 Saltbush . . . 



Na*S0 4 



40,800 



18,600 



17,800 



14,240 



9,600 



9,800 



12,020 



52,640 



61,840 



102,480 



125,640 



Na,CO, 



7,550 



3,840 



1,760 



640 



680 



960 



12,170 



4,000 



9,840 



2,360 



18,560 



NaCl 



9,640 

 3,360 

 1,360 

 1,240 

 1,000 

 1,720 

 5,100 

 5,440 

 9,680 

 5,760 

 12,520 



Total 

 Alkali 



45,760 

 21,840 

 20,920 

 16,120 

 11,280 

 12,480 

 25,520 

 59,840 

 8.1,360 

 110,320 

 156,720 



consequently toxic. High moisture should, therefore, be 

 maintained at least as long as the crop is upon the soil. 



The distribution of the alkali at different depths may have 

 an important bearing as to its effect on plants. Young plants 

 and shallow-rooted crops may be entirely destroyed by the 

 concentration of alkali at the surface, while the same quantity 

 evenly distributed through the soil, or carried by moisture to 

 a lower depth, would have caused no injury. A loam soil, by 



Table LXXIX 



Percentage of 



Total Salts in 



Soil 



.00— .20 

 .20— .40 

 .40— .60 



.6O—1.00 

 1.00—3.00 



Percentage of 



Black Alkali 



in Soil 



Crops 



All crops grow 

 All but most sensitive 

 Old alfalfa, sugar beet, sorghum, 

 barley 



Only most resistant plants 

 No plants 



