Phosphoric Acid.

Northland Age, Volume 2, Issue 43, 5 June 1906, Page 3

Phosphoric Acid.

The following table from Primrose McConnell’s “Agricultural Notebook” gives the comparative quantities of phosphoric acid removed in pound per acre per annum for the principal farm products, and shows each in its irue ratio. The phosphates are the only thing that need to be taken notice of, because in the case of potash there is usually a superabundance in the soil and little is removed; while with nitrogen pasture will renovate itself from the growth of clover therein, and no one would look on a nitrate manure as replacing “ fertility.”

Lbs. phosphoric acid per acre. Wheat, 30 bushels .. 14 Barley, 40 bushels .. 16 Oats, 45 bushelg . 13 Beans, 30 bushels .. 22 Hay, 1£ tons 12 Clover, 2 tons .. 25 Turnips, 17 tons .. 22 Swedes, 14 tons .. 17 Mangels, 22 tons .. 84 Potatoes, 6 tons 21 Store bullocks, 13001 b . 4 Milch cow (oOOgal. milk) and calf 4.2 Sheep, 1501 b 4.7

In the above, the straw, tops, etc., are left out of account; a store bullock is taken at live weight, 9001 b. In the ordinary run of farming the three kinds of live stock will about equal one another in the amount of

phosphoric acid they remove from the soil, while the crops remove four or five times as much, and there is uo reason in blaming the dairying trade on the plea that it is exhausting to the land.