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Results of long-term trials with farmyard manure and commercial fertilizers at the Gisselas experimental farm in the years 1930-1953.



Results of long-term trials with farmyard manure and commercial fertilizers at the Gisselas experimental farm in the years 1930-1953.



St. JordbFors. Medd, 120: 58



The experiments involved comparison of complete mineral fertilizing with no treatment and single applications of mineral N, P or K and/or farmyard manure to ley rotations on peat soils. Compared with NPK plots, yields were < 20% with no fertilizing or P only, 25% with N only and 50% with K only; plots receiving PK or three-yearly dressings of 30 t/ha manure yielded about 30%.

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