Please use this identifier to cite or link to this item: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1119540
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dc.contributor.authorMELGAR, R. J.
dc.contributor.authorSANCHEZ, P. A.
dc.contributor.authorSMYTH, T. J.
dc.contributor.authorCRAVO, M. da S.
dc.date.accessioned2025-12-04T18:51:01Z-
dc.date.available2025-12-04T18:51:01Z-
dc.date.created2020-01-29
dc.date.issued1991
dc.identifier.citationIn: McBRIDE, T. P. (Ed.). Tropsoils technical report, 1988-1989. Raleigh: North Carolina State University, 1991.
dc.identifier.urihttp://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1119540-
dc.descriptionAlluvial soils along the white water rivers; locally known as várzeas, are a major land resource in the Amazon basin. The state of Amazonas in Brazil has about 25 million hectares of such soils. Their high base status, adequate water supply, and eight-month flood-free period provide appropriate conditions for intensive food production in a region dominated by low fertility Oxisols and Ultisols. Total soil N is low in many of these soils, suggesting a potential nutrient deficiency. Yield response to N has been noted to increase during successive com crops in várzea soils. This response would be magnified with the use of improved, high yielding varieties.
dc.language.isoeng
dc.rightsopenAccess
dc.titlePotential productivity and nitrogen-use efficiency of corn and rice in várzeas: M-910C.
dc.typeParte de livro
dc.subject.thesagroSolo
dc.subject.thesagroArroz
dc.format.extent2p. 278-281.
riaa.ainfo.id1119540
riaa.ainfo.lastupdate2025-12-04
dc.contributor.institutionRICARDO J. MELGAR, N.C. STATE UNIVERSITY; P. A. SANCHEZ, N.C. STATE UNIVERSITY; THOMAS JOT SMYTH, N.C. STATE UNIVERSITY; MANOEL DA SILVA CRAVO, UEPAE DE MANAUS.
Appears in Collections:Capítulo em livro técnico (CPAA)

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