Fertilizers the Source Character And Composition of Natural Home Made And Ma
Fertilizers the Source Character And Composition of Natural Home Made And Ma
Edward Burnett Voorhees
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On good potato soils, therefore, a good fertiliza- tion would consist of 800 pounds per acre, as a mini- mum, of a mixture containing : Nitrogen 3 to 4 % Phosphoric acid 6 to 8% Potash 8 to 10 % The nitrogen is to be in quickly available forms; the phosphoric acid, also, is to be available, and the potash to be derived from sulfate, particularly if fine quality of crop, as indicated bj" appearance, is desired. If only yield is considered, the muriate is quite as serviceable. LATE POTATOES For l...ate potatoes, the considerations in reference to the form of the constituents and the amount of the application, as suggested for early potatoes, do not always hold good, since in many cases the crop is able to secure a larger proportion of its plant -food from soil sources, due, first, to the longer period of growth of the plant, and second, to the fact that the crop is usually grown upon soils naturally richer in the plant -food elements, though the proportion of pot- ash, as in the formulas already indicated, should be relatively large.
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