ORCHARD SOILS 



663 



are definitely known to be unsuitable. Comparison may thus be made 

 between "fruit" soils and soils in general and between good and poor 

 fruit land. 



Table 17. — Chemical Analyses of Average Soils of Humid and Arid Regions 

 AND of Certain Orchard Soils in Asia Minor and California 



Table 18. — Chemical Analyses of Typical Fruit Soils of Washington^' 



A, upper 

 bench land, 

 Wenatchee, 



per cent 



Insoluble silica 



Hydra ted silica 



Soluble silica (Si02) 



Potash (K2O) 



Soda (NazO) 



Lime (CaO) 



Magnesia (,MgO) 



Manganese dioxid (Mn304). . 



Iron oxid (.FP2O3) 



Alumina (AI2O3) 



Phosphorus pentoxide (PaOs) 



Sulfur trioxid (SO3) 



Carbon dioxid (CO2) 



Volatile and organic matter.. 



Total 



Humus 



Total nitrogen (N) 



81.632 

 2.498 

 0.316 

 0.518 

 0.233 

 0.714 

 0. 186 



4.760 

 6. 145 

 0.225 



B, volcanic 



ash, Walla 



Walla, per 



cent 



C, Kenne- 



wick sand, 



Kennewick, 



per cent 



77. 772 

 5.464 

 0.543 

 0.328 

 0.238 

 0.659 

 0.104 



4.601 

 3.925 

 0.037 



84.402 

 3.332 

 0.265 

 0.312 

 0.416 

 0.944 

 0.650 

 trace 

 4.505 

 5.889 

 0. 140 

 0.018 



D, sandy E, sandy 



soil, Vashon soil, Vashon 



Island, per Island, per 



cent cent 



76. 652 

 8.572 

 0.348 

 0.126 

 0. 106 

 0.615 

 0.807 



3.064 



4.852 

 0.044 



