It will be noted that while these two modes of presentation do change the figures a little, yet in either form the same general result is outlined with striking accuracy. It is also notable that notwithstanding the less complete extraction of soil-ingredients in the starred (★) states, the general ratios between arid and humid soils remain substantially the same. For Western Oregon, local calcareous formations compel omission of three lime figures from the averages.
AVERAGE COMPARISON OF SOILS IN
THE HUMID AND ARID REGIONS
OF THE UNITED STATES.
- (A) = Number analyzed.
- (B) = Insoluble Residue.
- (C) = Soluble Silica.
- (D) = Sum of Insoluble Residue and Soluble Silica.
- (E) = Potash
- (F) = Soda.
- (G) = Lime.
- (H) = Magnesia.
| (A) | (B) | (C) | (D) | (E) | (F) | (G) | (H) | |
|---|---|---|---|---|---|---|---|---|
| Humid Region. | ||||||||
| Rhode Island ★ | 7 | 82.41 | 1.69 | 84.10 | .15 | .09 | .43 | .27 |
| North Carolina | 20 | 81.63 | 3.50 | 85.13 | .15 | .06 | .09 | .08 |
| South Carolina | 30 | 85.54 | 3.39 | 88.93 | .12 | .07 | .07 | .12 |
| Georgia | 40 | 86.07 | 2.89 | 88.96 | .15 | .07 | .08 | .10 |
| Florida | 10 | 85.33 | 1.33 | 86.66 | .07 | .03 | .09 | .03 |
| Alabama | 50 | 81.58 | 4.89 | 86.47 | .23 | .07 | .17 | .21 |
| Mississippi | 97 | 85.87 | 4.39 | 90.26 | .28 | .11 | .15 | .31 |
| Louisiana | 35 | 81.12 | 3.54 | 84.66 | .19 | .09 | .16 | .23 |
| Arkansas | 38 | 88.54 | .17 | .06 | .08 | .43 | ||
| Kentucky | 185 | 86.72 | .20 | .10 | .08 | .19 | ||
| Ohio ★ | 140 | 87.00 | .26 | .35 | .28 | .44 | ||
| Oregon (W. of Cascades) | 44 | 64.82 | 5.38 | 70.20 | .23 | .19 | .83 | .73 |
| Average for Humid Region | 696 | 84.17 | 4.04 | 88.21 | .21 | .14 | .13 | .29 |
| “ by States | 81.59 | 3.45 | 85.04 | .18 | .11 | .11 | .26 | |
| Transition Region. | ||||||||
| Minnesota. ★—Semi-humid | 144 | 76.60 | 8.74 | 85.34 | .30 | .23 | .65 | .43 |
| North Dakota. ★—Semi-arid | 34 | 68.44 | 7.28 | 75.72 | .42 | .73 | .91 | .64 |
| Average for region | 178 | 75.04 | 8.46 | 83.50 | .33 | .32 | .70 | 47 |
| Arid Region. | ||||||||
| Montana | 59 | 70.98 | 4.17 | 75.15 | .87 | .27 | 1.03 | 1.36 |
| Idaho | 17 | 75.34 | 5.22 | 80.56 | .56 | .26 | .85 | 1.11 |
| Wyoming ★ | 23 | 76.86 | 2.25 | 79.11 | .64 | .41 | 1.91 | 1.31 |
| Colorado ★ | 16 | 77.70 | 7.10 | 84.80 | .44 | .44 | .43 | .81 |
| Utah ★ | 38 | 81.04 | .98 | .53 | 1.77 | .73 | ||
| Arizona | 20 | 64.58 | 13.78 | 78.36 | .82 | .43 | 2.37 | 1.89 |
| Nevada ★ | 22 | 71.77 | 5.95 | 77.72 | .54 | .93 | 2.04 | .96 |
| California | 262 | 66.28 | 9.79 | 76.07 | .61 | .29 | 1.25 | 1.50 |
| OregonEast of | 7 | 72.10 | 9.68 | 81.78 | .54 | .26 | 1.23 | .73 |
| Washington Cascades | 109 | 71.60 | 6.09 | 77.69 | .65 | .36 | 1.25 | .96 |
| Averages for Arid Region | 573 | 69.16 | 6.71 | 75.87 | .67 | .35 | 1.43 | 1.27 |
| “ by States | 71.91 | 7.11 | 79.02 | .67 | .42 | 1.61 | 1.14 |
- (I) = Br. oxide Manganese.
- (J) = Peroxid of Iron.
- (K) = Alumina.
- (L) = Phosphoric Acid.
- (M) = Sulfuric Acid.
- (N) = Water and Organic Matter.
- (O) = Hygroscopic Moisture.
- (P) = Humus.
- (Q) = Nitrogen in Humus.
- (R) = Nitrogen in Soil.
| (I) | (J) | (K) | (L) | (M) | (N) | (O) | (P) | (Q) | (R) | |
|---|---|---|---|---|---|---|---|---|---|---|
| Humid Region. | ||||||||||
| Rhode Island ★ | .04 | 3.59 | 3.66 | .09 | .10 | 7.43 | 5.23 | 2.59 | ||
| North Carolina | .07 | 4.72 | 5.71 | .12 | .06 | 3.98 | 4.18 | |||
| South Carolina | .05 | 2.47 | 4.59 | .11 | .06 | 3.39 | 4.22 | .42 | ||
| Georgia | .09 | 2.75 | 4.02 | .11 | .10 | 3.62 | 3.54 | |||
| Florida | .08 | .60 | 1.17 | .08 | .05 | 1.89 | 1.72 | |||
| Alabama | .12 | 3.81 | 2.70 | .13 | .05 | 4.04 | 7.07 | |||
| Mississippi | .14 | 2.64 | 4.07 | .09 | .03 | 3.33 | 5.41 | |||
| Louisiana | .02 | 3.12 | 4.24 | .10 | .05 | 4.26 | 6.66 | |||
| Arkansas | .21 | 3.10 | 3.51 | .15 | .05 | 3.70 | 2.47 | |||
| Kentucky | .20 | 6.01 | 3.52 | .11 | .04 | 3.69 | 1.85 | |||
| Ohio ★ | 3.11 | 3.36 | .11 | .04 | 5.04 | |||||
| Oregon (W. of Cascades) | .09 | 11.64 | .23 | .16 | 3.20 | 1.55 | ||||
| Average for Humid Region | .13 | 3.88 | 3.66 | .12 | .05 | 4.40 | 1.22 | |||
| “ by States | .10 | 3.26 | 3.68 | .12 | .06 | 3.96 | 1.52 | |||
| Transition Region. | ||||||||||
| Minnesota. ★—Semi-humid | 2.83 | 4.43 | .22 | .01 | 7.30 | 2.91 | 6.53 | .19 | ||
| North Dakota. ★—Semi-arid | 3.62 | 5.17 | .19 | .05 | 13.85 | 4.67 | 7.28 | .34 | ||
| Average for region | 2.08 | 4.57 | .21 | .02 | 8.55 | 3.24 | 6.67 | .22 | ||
| Arid Region. | ||||||||||
| Montana | .37 | 4.28 | 6.81 | .22 | .06 | 7.14 | ||||
| Idaho | .02 | 3.85 | 6.38 | .16 | 5.01 | 2.00 | 1.68 | 5.95 | .10 | |
| Wyoming ★ | 3.05 | 6.61 | .18 | .11 | 5.48 | |||||
| Colorado ★ | 3.82 | 4.98 | .23 | .03 | 3.57 | 2.31 | .03 | |||
| Utah ★ | .03 | 3.08 | 5.50 | .22 | 6.27 | 2.37 | ||||
| Arizona | .06 | 4.92 | 6.43 | .13 | .06 | 3.57 | 1.65 | |||
| Nevada ★ | .32 | 5.67 | 5.00 | .32 | .14 | 5.93 | .12 | |||
| California | .06 | 6.61 | 8.44 | .10 | .06 | 4.74 | 6.09 | 0.91 | 15.23 | .14 |
| Oregon East of | .08 | 10.75 | .11 | tr. | 4.40 | .67 | ||||
| Washington Cascades | 5.37 | 6.31 | .21 | .03 | 5.77 | 5.14 | ||||
| Averages for Arid Region | .11 | 5.48 | 7.21 | .16 | .06 | 5.15 | 5.46 | 1.13 | 12.50 | .13 |
| “ by States | .13 | 4.74 | 6.27 | .19 | .07 | 4.71 | 5.34 | 1.03 | 10.59 | .10 |
New Mexico.—Few analyses of New Mexico soils have been made, but the average results of six partial determinations made by Goss, and one full analysis made by Hare according to the method of the writer, and given below, show substantial accord with the averages of the above table. The averages of Goss’ determinations are: Potash .780, Phosphoric acid .221, Nitrogen .108 per cent.
CHEMICAL ANALYSIS OF RIO GRANDE SILT
(by Prof. R. F. Hare.)
Deposited on land by irrigation.