Page 7 Advertisements Column 1

Putaruru Press, Volume VII, Issue 307, 26 September 1929, Page 7

SUPERPHOSPHATE FOR PASTURES HEAVY DRESSINGS PROFITABLE OF ' PRODUCE MORE BUTTERFAT How much fertiliser is it profitable to fapply to pastures ? Here lies the essential test of top-dressing practice from .'the viewpoint of farm economics. The .application of, say, 2cwt. per acre of -such a standard top-dressing as superphosphate will produce usually a result that is easily visible in both increased ;yield and in a beneficial change in the nature of' the plants composing the award. The application of 4 cwt. per •*acte of superphosphate will likewise usually show a visible increase in yield 'Over that dressed with 2 cwt. per acre. When the results of a dressing of 6 cwt. per acre are compared with the results not be so easily visible. HOW MUCH TO APPLY Now comes the question of how much increase is visible to the eye. It is usually accepted that increases of 20 per *<ient. in yield are visible. An increase of under 20 per cent, in yield is either not easily seen, or is invisible. Yet an increase in yield due to the application of greater amounts of superphosphate than are usually applied, although not perhaps visible, may be very profitable, both on account of the increase not only in the quantity, but also in the nutritiousness of the herbage. The exact quantities of superphosv phate which may be profitably applied .are as yet unascertained, but it will pro“bably be found that the application of •5 to 6 ewt. per acre per annum in one dressing will prove profitable. However, modern practice shows that more ■frequent dressings than one per annum TljJive the quick growth of pasturage desired by the dairy farmer, so that two —one in spring and one in au—of 3to 4 cwt. each will, very probably, be !found to be the best practice when using superphosphate. This -double heavy dressing is particularly applicable to heavily-stocked dairy pastures, for, the larger number of stock carried the greater will be the mineral depletion of the pastures. PRODUCTION THE CRITERION real value of a top-dressed pasture does not lie in the visible quantity ■of herbage produced, but in the amount ■of butteffat such a pasture will produce. i A high standard in this direction *can be reached only on elosely grazed pastures which are rich in minerals. The time will come when he who aims ■at 2001 b. of butterfat per acre will top•fdress thrice annually with 5 cwt. ot fUsuperphosphate per acre at a cost equal Ho the value of 501 b. of butterfat, thus leaving a very substantial profit per acre.

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