New Zealand Journal of Agricultural Research · 1985 · 114 citations · 13 references
AgricultureAgronomySoil SciencesNutrient ManagementSoil FertilitySoil ScienceNitrogen CycleNitrogen CyclingNitrogen ManagementNitrogen NutritionNutrient LossesSoil PhFertilizer Response In PasturesManure VolatilizationNitrogen Cycling In PasturesNitrogen Fertilization EffectsNitrogen Fertilizer ManagementNitrogen Losses From ManureNitrogen Management In PasturesSurface Soil Ph
Abstract Ammonia (NH 3 ) volatilisation from various nitrogenous (N) fertilisers broadcast at different times of year on to pasture at a rate of 3 g/m 2 N (30 kg/ha N) was measured by an enclosure method. The average percent losses of NH 3 ‐N were: urea, 11.9; diammonium phosphate, 5.3; ammonium sulphate, 1.0; and calcium ammonium nitrate, 0.8. Loss from sulphur‐impregnated urea was equal to, or slightly less than that from urea. The loss was positively related to the maximum soil surface pH produced by each of the fertilisers. No seasonal pattern was observed, except that NH 3 loss tended to be lower in August–September. The loss from urea increased from 13 to 33% of N applied as the application rate increased from 3 to 20 g/m 2 N (30–200 kg/ha N).
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A. B. Lloyd, M. Jane Sheaffe · Plant and Soil · 1973 · 386 citations
A closed ammonia cycle within a plant canopy
O. T. Denmead, J. R. Freney, J. R. Simpson · Soil Biology and Biochemistry · 1976 · 235 citations