| 摘要 |
576,185. Manures. BOOER, J. R. and BERK & CO., Ltd., F.W. March 29, 1944, No. 5790. [Class 111] A clear sediment-free, concentrated aqueous artificial fertiliser solution containing not less than three per cent. each of nitrogen (N), potash (K2O) and phosphate) (P2O5) together with calcium is produced by dissolving with monocalcium phosphate, soluble nitrogen and potassium compounds which do not precipitate the calcium. Zinc, magnesium, iron, manganese and boron may be incorporated and acid, e.g., phosphoric acid, may be added to prevent precipitation of these elements or the calcium. The amount of magnesium as MgO may be 0.5 to 1.5 per cent. of iron as Fe2O3 or manganese as MnO 0.1 per cent. or less, and of zinc as ZnO or boron as B2O3 0.001 to 0.1 per cent.
|
