+-----------------------------+---------+-----------+--------+ | | Surface | 18 inches | 5 feet | | | Soil. | deep. | deep. | +-----------------------------+---------+-----------+--------+ | SOLUBLE IN WATER. | | | | | | | | | | Lime | 0.07 | ... | ... | | Magnesia | trace | ... | ... | | Potash | 0.06 | ... | ... | | Soda | 0.04 | ... | ... | | Chlorine | 0.05 | ... | ... | | Organic matter | 0.15 | ... | ... | | | ---- | | | | | 0.37 | | | | SOLUBLE IN ACIDS. | | | | | | | | | | Silica | 0.74 | ... | ... | | Peroxide of iron | 2.22 | 1.67 | 1.87 | | Protoxide of iron | 0.77 | 9.05 | 3.10 | | Alumina | 1.90 | 2.52 | 4.21 | | Lime | 10.43 | 3.04 | 25.75 | | Magnesia | 0.20 | 0.54 | 0.51 | | Potash | 0.03 | 0.29 | 0.28 | | Soda | 0.02 | 0.11 | 0.16 | | Sulphuric acid | trace | 0.02 | 0.13 | | Phosphoric acid | 0.14 | trace | 0.04 | | Carbonic acid | 7.38 | 0.82 | 20.23 | | | ----- | ----- | ----- | | | 23.83 | 18.06 | 56.28 | | | | | | | INSOLUBLE IN ACIDS. | | | | | | | | | | Silica | 41.44 | 51.24 | 27.67 | | Protoxide of iron | 3.24 | 0.26 | 1.40 | | Alumina | 9.00 | 1.50 | 1.00 | | Lime | 0.08 | 0.88 | trace | | Magnesia | 0.80 | 0.54 | trace | | Potash | ... | 0.74 | ... | | Soda | ... | 0.25 | ... | | | ----- | ----- | ----- | | | 54.56 | 55.41 | 30.07 | | ORGANIC MATTERS. | | | | | | | | | | Humine | 1.58 }| | | | Humic acid | 1.15 }| 12.05 | 7.49 | | Insoluble organic matters | 7.66 }| | | | Water | 11.13 | 14.69 | 6.06 |