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Abstract:
In 1963 anð, L964 litter was collected in a terra firme forest near Manaus, oven-dried and shipped
to Europè. The sampleswere subdivided intofour litterfractions (leaves, wood,'fruits, termite fraction),
dried at 105o and weighed. Organic carbon and total nitrogen of these litter fractions were determined.
Annual average litter production is 7.4 t/ha consisting in 5.6 t ofleaves, and 1.8 t ofother litter.
105,6 kg nitrogen return annually to the soil. Compared with data on litter production and nitrogen
content of litter of other tropical forests, the Amazonian forest produces less litter and returns a
lower amount of nitrogen to the soil.