------------------+---------------------------+--------------------------- Depth. | Arable soil. | Old pasture soil. ------------------+-----------+---------------+------------+-------------- | per cent. | lb. per acre. | per cent. | lb. per acre. 1st 9 inches | 0.120 | 3,015 | 0.245 | 5,351 2d 9 " | 0.068 | 1,629 | 0.082 | 2,313 3d 9 " | 0.059 | 1,461 | 0.053 | 1,580 4th 9 " | 0.051 | 1,228 | 0.046 | 1,412 5th 9 " | 0.045 | 1,090 | 0.042 | 1,301 6th 9 " | 0.044 | 1,131 | 0.039 | 1,186 | ----- | ----- | ----- | ----- Total, 54 inches | - | 9,554 | - | 13,143 |-----------+---------------+------------+-------------- 7th 9 inches | 0.042 | 1,049 | - | - 8th 9 " | 0.041 | 1,095 | - | - 9th 9 " | 0.044 | 1,173 | - | - 10th 9 " | 0.043 | 1,076 | - | - 11th 9 " | 0.043 | 1,112 | - | - 12th 9 " | 0.045 | 1,198 | - | - | ----- | ------ | ----- | ----- Total, 9 feet | | 16,257 | | ------------------+-----------+---------------+------------+-------------- (2) _Manitoba Soils._ ----------+----------|-------------+-----------+---------- Depth. | Brandon. | Niverville. | Winnipeg. | Selkirk. ----------+----------+-------------+-----------+---------- | per cent.| per cent. | per cent. | per cent. 1st foot | 0.187 | 0.261 | 0.428 | 0.618 2d " | 0.109 | 0.169 | 0.327 | 0.264 3d " | 0.072 | 0.069 | 0.158 | 0.076 4th " | 0.019 | 0.038 | 0.107 | 0.042 ----------+----------+-------------+-----------+---------- NOTE III. (p. 130). NITROGEN AS NITRATES IN CROPPED SOILS RECEIVING NO NITROGENOUS MANURE, IN LB. PER ACRE (_Rothamsted Soils_).