----------------------+----------------+---------+----------------+-------- | | | Nitrogen per | | | | million, as | Total | | +--------+-------+Nitrogen | Year. |Rainfall.| | | per | | |Ammonia.| Nitric| acre. | | | | Acid. | ----------------------+----------------+---------+--------+-------+-------- | | | | | lb. Kuschen | 1864-65 | 11.85 | 0.54 | 0.16 | 1.86 " | 1865-66 | 17.70 | 0.44 | 0.16 | 2.50 Insterburg | 1864-65 | 27.55 | 0.55 | 0.30 | 5.49 " | 1865-66 | 23.79 | 0.76 | 0.49 | 6.81 Dahme | 1865 | 17.09 | 1.42 | 0.30 | 6.66 Regenwalde | 1864-65 | 23.48 | 2.03 | 0.80 | 15.09 " | 1865-66 | 19.31 | 1.88 | 0.48 | 10.38 " | 1866-67 | 25.37 | 2.28 | 0.56 | 16.44 Ida-Marienhuette, mean | | | | | of six years | 1865-70 | 22.65 | | | 9.92 Proskau | 1864-65 | 17.81 | 3.21 | 1.73 | 20.91 Florence | 1870 | 36.55 | 1.17 | 0.44 | 13.36 " | 1871 | 42.48 | 0.81 | 0.22 | 9.89 " | 1872 | 50.82 | 0.82 | 0.26 | 12.51 Vallombrosa | 1872 | 79.83 | 0.42 | 0.15 | 10.38 Montsouris, Paris | 1877-78 | 23.62 | 1.91 | 0.24 | 11.54 " | 1878-79 | 25.79 | 1.20 | 0.70 | 11.16 " | 1879-80 | 15.70 | 1.36 | 1.60 | 10.52 | | | | | | +---------+--------+-------+-------- | | | | | |Mean of 22 years| 27.63 | | | 10.23 | | | | | ----------------------+----------------+---------+--------+-------+-------- NOTE II. (p. 122). NITROGEN IN SOILS AT VARIOUS DEPTHS. (1) _Rothamsted Soils._