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Nitrogen (N) content in the soil and in the herbaceous biomass were monitored during spring of 2004–2006 to determine how the herbaceous layer development influences soil N availability in the montado ecosystem of southern Portugal. Highest (246.6 ± 52.7 g m −2 ) and lowest (123.2 ± 89.5 g m −2 ) peak biomass occurred in 2006 and 2005 respectively. Total soil N within the top 20 cm...
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