FOOTNOTES:
[AG] Marl is earth containing lime, but its use is not to be recommended in this country, except where it can be obtained at little cost, as the expenses of carting the earth would often be more than the value of the lime.
[AH] The straw producing the grain and the turnip and potato tops contain more lime than the grain and roots.
[AI] See Working Farmer, vol. 2, p. 278.
[AJ] Glycerine, etc.
CHAPTER X.
ATMOSPHERIC FERTILIZERS.
Are the gases in the atmosphere manures?
What would be the result if they were not so?