Effects of Ammonium and Nitrate Nitrogen on a Temporary Molasses Crass Pasture

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Date
1954
Authors
Dougall H. W.
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Abstract
In 1936, Lewis [1] reported that when perennial rye grass is grown in a sand bentonite medium [2] of pH 7.61, any nitrate absorbed by the plant from sodium nitrate is less effective in increasing yields of dry matter than ammonium nitrogen from sulphate of ammonia. Also, the percentage phosphoric oxide content of the grass is lower with the nitrate fertilizer than with the ammonium fertilizer. Similar results were obtained last year on our Grassland Station at Kitale, when the same two fertilizers were compared in a field experiment on a temporary molasses grass pasture, established two years ago in a coarse, sandy loam soil of pH 5.8. Nitrate of soda and sulphate of ammonia were applied to the pasture at rates equivalent to 18 lb., and 36 lb., N per acre, a basal dressing of double superphosphate, providing the equivalent of 80 lb., P,O, per acre, having first been applied. All treatments were replicated five times.
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East African Agricultural And Forestry Journal, XIX (No. 4), p. 261-262