This paper describes smallholder agricultural systems in the lower Amazon where the Santarém sub-Cluster is based. Here, despite the fertility of floodplain soils and a long tradition of floodplain farming, smallholder agriculture is stagnating. Once the basis of the floodplain economy, its role in smallholder subsistence has now been taken over by commercial fishing and extensive cattle ranching.
Nitric and nitrous oxide fluxes from intensifying crop agriculture in the seasonally dry tropical Amazon–Cerrado border region
Nitric and nitrous oxide fluxes from intensifying crop agriculture in the seasonally dry tropical Amazon–Cerrado border region
apid expansion and intensification of crop agriculture in the tropics may accelerate ecosystem losses of reactive nitrogen (N). We quantified emissions of nitric oxide (NO) and nitrous oxide (N2O) in forest, single-cropped soybean [Glycine max (L.) Merr.], and...