Aug. 20, 1917 



Relation of Soil Water Movement 



399 



Mason (13, pp. 20-23), at Palm Springs, California, and P is from sand 

 drifts in the Whitewater Wash adjacent to Palm Springs station. 



In Table VI are reported the total nitrogen, the organic carbon as 

 determined by combustion with copper oxid in a current of oxygen after 

 treatment with a phosphoric-acid solution and subsequent evaporation 

 to dryness, and the organic matter, as well as the hygroscopic coefficient, 

 the moisture equivalent, and the maximum water capacity as determined 

 by Hilgard's method. 



Table VI. — Composition and physical properties of soils used in the experiments 



Soil. 



Loess soil from near Lin- 

 coln, Nebr.: 



Surface D 



Subsoil A 



Loess soil from near McCook, 

 Nebr.: 



Surface C 



Subsoil G 



Loess soil from near Culbert- 

 son, Nebr.: 



Surface E 



Subsoil H 



"Hard land" from near Im- 

 perial, Nebr.: 



Surface I 



Subsoil K 



"Sandy land" from near 

 Imperial, Nebr.: 



Surface M , 



Subsoil L 



"Hard land" from near 

 Madrid, Nebr.: 



Subsoil J 



Dune sand from near Dun- 

 ning, Nebr. : 



Subsoil Q 



Black adobe from near 

 Douglas, Ariz.: 



Surface B 



Red loam from Cuervo, 

 N. Mex.: 



Surface F 



Red desert sand from Oro- 

 grande, N. Mex.: 



Surface N 



Sand from Pope orchard, 

 Palm Springs, Cal.: 



Subsoil O 



Gray desert sand from Palm 

 Springs Station, Cal.: 

 Surface P 



Total 

 nitro- 

 gen. 



Per ccnl. 



o. 244 



.049 



104 

 029 



079 

 018 



106 

 016 



077 

 023 



. 021 



.ooS 

 .088 

 .072 

 . 020 



(^) 



Organic 

 carbon. 



Per cent. 



2.86 



• 36 



1.23 



■35 



90 



32 



I. 07 

 • 17 



.28 



•05 



I. 29 



.62 



. 20 



(&) 

 (^) 



Organic 

 niatter.a 



Per cent. 



A- 93, 

 .62 



2. 12 

 .60 



I- 55 

 •55 



.29 



I. 22 

 .29 



.08 



I. 07 



34 



(^) 



Q>) 



Hygro- 

 scopic 

 coeffi- 

 cient. 



10. 2 



10.5 



10. I 

 7.6 



7-1 

 3-4 



3-3 

 3-4 



5-6 



.6 



12. 9 



10. o 



r-7 



•9 



Mois- 

 ture 

 equiva- 

 lent. 



27.8 

 29-5 



24. I 

 21. 2 



22. 5 

 19.7 



16.8 



7-5 



7-9 

 7.2 



13-5 



1-5 



25.8 



ig. 2 



3-0 

 1.6 



Ratio of 

 moisture 

 equiva- 

 lent to 

 hygro- 

 scopic co- 

 efficient. 



2-73 

 2. 22 



2.30 

 2- 59 



2. 23 

 2-59 



2-37 



2-39 

 2. 12 



2. 41 

 2. 50 

 2. 00 

 1.92 



1. 76 

 1.77 



2. 54 



Maxi- 

 mum 

 water 

 capac- 

 ity. 



Per cent. 

 60. 9 



65-7 



63-7 



55-4 



56.8 



57-2 



53-4 

 36. o 



34-2 



.^I.O 



46.3 



25.8 



60.3 

 49.0 



27. I 



28.9 

 27.0 



<» Organic matter= Organic CX 1.724. 6 These samples were lost before the analyses had been made. 



