The legacy effect of synthetic N fertiliser.
Wytse J VonkRenske HijbeekMargaret J GlendiningDavid S PowlsonAnne BhogalInes MerbachJoão Vasco SilvaHanna J PoffenbargerJagman DhillonKlaus SielingHein F M Ten BergePublished in: European journal of soil science (2022)
Nine long-term cereal experiments in Europe and USA were analysed for long-term crop N recovery of synthetic N fertiliser.On average, and with application rates between 34 and 269 kg N/ha, crop N recovery increased from 43.8% in the first season to 66.0% in the long term.Delta recovery was larger for winter wheat than maize.Observed increases in crop N uptake were not explained by proportionate increases in topsoil total N stock.
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