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- W2079648453 abstract "SUMMARY During the growing season of 1988 at the Agricultural Research Institute, Hillsborough, cattle slurry was kept whole or was separated through screens with mesh sizes of 5 mm, 3 mm, 0·25 mm and 0·015 mm. The resulting slurry liquids were either left unacidified or were acidified to pH 5.5 with 5 M -H 2 SO 4 prior to application at 75 kg NH + 4 -N/ha to perennial ryegrass in the field. Volatilization of ammonia was measured using ventilated enclosures. Plots treated with a range of rates of inorganic fertilizer N were used to construct response curves to assess the efficiency of N in slurry for herbage production compared with equinitrogenous inorganic fertilizer. On average over the season, acidification of cattle slurry decreased ammonia volatilization to < 15% of that from unacidified whole slurry. Compared with inorganic fertilizer N, the overall efficiency of NH + 4 -N was 96% in acidified slurries and 36% in unacidified whole slurry. Ammonia volatilization from separated slurries decreased with decreasing mesh size to 39% of that from whole slurry for a 0·015 mm mesh. The overall efficiency of NH 4 + -N in slurry separated through a 0·015 mm mesh was 76%. A highly significant linear relationship was found between NH 3 -N volatilized from all slurry treatments and N offtake in herbage at all three harvests." @default.
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- W2079648453 date "1990-08-01" @default.
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- W2079648453 title "Effect of separation and acidification of cattle slurry on ammonia volatilization and on the efficiency of slurry nitrogen for herbage production" @default.
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- W2079648453 doi "https://doi.org/10.1017/s0021859600073901" @default.
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