Note * — Chapter XXIX
Reading edition
“3½ cwts. Superphosphate of Lime”—in all cases, made from 200 lbs. Bone ash, 150 lbs. Sulphuric acid sp. gr. 1.7 (and water).
† Sulphate Potass—300 lbs. per annum for the first 6 years, 1852-7.
‡ Sulphate Soda—200 lbs. per annum for the first 6 years, 1852-7.
§ The “Ammonia-salts”—in all cases equal parts of Sulphate and Muriate of Ammonia of Commerce.
‖ Plots “AA” and “AAS”—first 6 years, 1852-7, instead of Nitrate of Soda, 400 lbs. Ammonia-salts per annum; next 10 years, 1858-67, 200 lbs. Ammonia-salts per annum; 1868, and since, 275 lbs. Nitrate of Soda per annum. 275 lbs. Nitrate of Soda is reckoned to contain the same amount of Nitrogen as 200 lbs. “Ammonia-salts.”
¶ Plots “AAS”—the application of Silicates did not commence until 1864; in ‘64-5-6, and 7, 200 lbs. Silicate of Soda and 200 lbs. Silicate of Lime were applied per acre, but in 1868, and since, 400 lbs. Silicate of Soda, and no Silicate of Lime. These plots comprise, respectively, one half of the original “AA” plots, and, excepting the addition of the Silicates, have been, and are, in other respects, manured in the same way as the “AA” plots.