| 1.54| 6.36 | .089 1704 |Valley soil, Hollister, San Benito Co. | .94| 5.21 | .049 2295 |Tule soil, Upper Lake, Lake Co. | 1.70| 4.50 | .077 110 |Alluvial soil, Putah Creek, Dixon, Solano Co. | 1.71| 4.25 | .072 37 |Redwood Valley soil, Pescadero, San Mateo Co. | 2.28| 3.07 | .070 | | | | | Average for California | 2.45| 5.29 | .135 | | | | | OTHER STATES. | | | | | | | 26 |Bog soil, Michigan[52] |33.02| 6.08 | 2.012 |Back-land clay loam, Houma, Louisiana | 5.07| 4.20 | .218 |Duff soil, Oregon |13.84| 3.49 | .483 |Sandy prairie soil, Harris Co., Texas | 2.13| 3.66 | .184 | | | | | Average for other States | 7.01| 3.78 | .295 | | | | 23 |Red soil, Oahu Island, Hawaii (maximum) | 1.57| 5.07 | .078 27 |Guava soil, Hawaii Island (minimum) | 9.95| 1.71 | .170 |Average of 5 soils, Oahu Island | 3.01| 6.07 | .237 |Average of 2 soils, Maui Island | 9.07| 2.13 | .286 |Average of 4 soils, Hawaii Island | 6.17| 2.54 | .146 | | | | | Average for Hawaiian Islands | 5.26| 3.69 | .169 | | | | | Total for Humid soils, average | 4.58| 4.23 | .166 -------+----------------------------------------------+-----+--------+------- [52] Introduced only for comparison of the nitrogen percentage in Humus and not included in the average. It thus appears that on the average the humus of the arid soils contains about three and a half times as much nitrogen as that of the humid; that in the extreme cases, the difference goes as high as over six to one (see Nos. 37 and 704); and that in the latter cases, the nitrogen-percentage in the arid humus considerably exceeds that of the albuminoid group, the flesh-forming substances.