WATER SOILS. 



29 



Chemical composition of typical Maryland soils. 



Soil and method of jimilysis. 



Columbiiiii truck soil: 



Bv fusion method 



Soluble in 1.115 sp. jrr. HOI 



Soluble in J-normal HCl 



Chesiipeake and Columbia truek 

 !Soil: 



By fusion method 



Soluble in 1.115 sp. gr. HCl 



Soluble in !-normal HCl 



Chesajieake tobaeeo soil 



Bv fusion nulhod 



Soluble in 1. 115sp.gr. HCl 



Soluble in J-normal HCl 



Chesapeake corn and wheat .soil .. 



By fusion method 



Soluble in 1.115 sp.gr. HCl 



Soluble in J-normal HCl 



Columbia corn and wlieat soil 



By fusion method 



Soluble in 1.115 sp.gr. H(;i 



Soluble in l-normal HCl 



Chesapeake and Columbia eorn 

 and wheat soil: 



By fusion method 



Corn "and wheat soil of Eastern 

 Shore: 

 Soluble in 1.115 sp. gr. HCl 



Soluble in ;J-normal HCl 



Hudson Kiver shale 



By fusion method 



Soluble in 1.115 sp.gr. HCl 



Soluble in i-normal HCl 



Gneiss soil 



By fusion method 



Soluble in 1.115 sp. gr. HCl 



Soluble in -J-normal HCl 



Gabbro soil 



Bv fu.sion method 



Soluble in 1.115 sp. gr. HCl 



Soluble in J-normal HCl 



Helderberg limestone 



By fusion method 



Soluble in 1.116 sp.gr. HCl 



Soluble in J-normal HCl 



Catskill sandst( me 



15 V fusion method 



Soluble in 1.115 sp. gr. HCl 



Sohible in J-normal HCl 



Trias.sic sandstone 



Bv fusion method 



Soluble in 1.115 sp. gr. HCl 



Soluble in jt-normal HCl 



Trenton limestone 



Bv fusion metliod , 



Soluble in 1.115 sp. gr. HCl 



Solulile in J-normal HCl , 



Cambrian sandstone 



Bv fusion method 



Soluble in 1.115 sp. gr. HCl 



Soluble in ^-normal HCl 



Lafayette .sands: 



By fusion method 



Serpentine .soils 



Bv fusion method , 



Soluble in 1.115 sp. gr. HCl 



Soluble in J-nornuil HCl 



Potomac clay soils 



By fusion method 



Soluble in 1. 115 sp. gr. HCl 



Silica. o 



Per ct. 

 93. 89 

 96. 92 



89. 92 

 96.12 



97. 813 



84. 95 

 89.72 



95. 531 



78.05 

 84.08 



93.69 



80.99 

 88.13 



86. 56 

 95. 114 



64. 80 

 73.46 



rot- 

 ash. 



Perct. 

 0.47 

 .025 



1.06 



.009 



.91 

 .25 



1.27 

 .42 



(&) 



.13 

 .024 



64. 67 

 73.36 



53. 54 

 01.79 



88. £07 



70. 86 

 80.00 



65. 85 

 81.56 



62.00 

 74.81 



65. 25 

 74.49 



92. 711 



64.41 

 82. 42 



93. 084 

 94.32 



67. 55 

 83.71 



62.94 

 84.05 



2.40 

 .40 



.016 



1.31 

 .19 



.90 

 .19 



.013 



2.37 



.72 



.022 



3.02 



.57 



.017 



3.10 

 .67 



.015 



3.05 



.45 



3.40 

 .33 



1.64 

 .18 



.015 



1.54 

 .14 



Soda. 



Per ct. 



0.22 



.04 



.012 



Perct. 



0.41 



.04 



.61 

 .10 



.52 

 .18 



(&) 



.51 

 .14 



1.87 

 .10 



.017 



Mag- 

 nesia. 



Perct. 



0.32 



.21 



.63 

 .12 



.098 



.67 

 .10 



.043 



.61 

 .07 



.40 

 .02 



.019 



.47 

 .37 



.030 



.73 

 .52 



.056 



.45 

 .041 



1.09 



.78 



.43 

 .030 



2.08 



1.78 



.85 

 .058 



1.21 

 .53 



.027 

 .07 



3.21 



.88 



Iron 

 oxid. 



Perct. 

 0.75 



.75 



Alu- 

 mina. 



Perct. 

 1.90 

 1.90 



Per ct 

 0.07 

 .025 



.75 



.58 



4. 04 

 1.25 



0.115 



2.30 

 2.12 



6.58 

 3.78 



0.617 



3.26 



1.85 



9.98 

 7.15 



2.67 

 1.95 



8.82 

 5.13 



5.70 15.50 

 4.15 |l0.85 



0.406 



3.95 19.29 

 5.95 I 9.62 



5.58 

 3.88 



17.46 

 6.15 



2.06 



4.82 13.46 

 3. 82 5. 22 



"0480 



4.22 

 3.07 



21. 63 

 5.26 



Phos- 

 phor- 

 ic 

 acid. 



.076 

 .024 



.001 



.26 

 .155 



.034 

 .002 



.058 

 .001 



.17 

 .105 



. 125 

 .0.55 



.00; 



.11 



.082 



.002 



.19 

 .065 



.001 



.135 

 .046 



Reaction. 



Very faintly 

 acid. 



Acid, 2d in 

 acidity. 



Most acid of 

 all. 



Acid, 3d in 

 acidity. 



Alkaline. 



Neutral. 



Neutral. 



Neutral. 



Neutral. 



Acid. 



Neutral. 



Neutral. 



Acid. 



Very faintly 

 acid. 



■ ttTotal silica in case of fusion method, insoluble silicates in case of the ('oncentrated hydrochlonc 

 acid nutliod, and the sum of the soluble and insoluble silica in case of the J normal hydrochlonc 

 acid method, 

 i) Not determined. 



