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dc.contributor.authorVieira, Sidney Rosa
dc.contributor.authorPaz-González, Antonio
dc.date.accessioned2005-12-20T19:35:44Z
dc.date.available2005-12-20T19:35:44Z
dc.date.issued2003
dc.identifier.citationBragantia, 2003, vol. 62, nº. 1, p.127-138es_ES
dc.identifier.issn0006-8705
dc.identifier.urihttp://hdl.handle.net/2183/444
dc.description.abstract[Abstract] The objective of this study was to assess spatial variability of soil properties and crop yield under no tillage as a function of time, in two soil/climate conditions in São Paulo State, Brazil. The two sites measured approximately one hectare each and were cultivated with crop sequences which included corn, soybean, cotton, oats, black oats, wheat, rye, rice and green manure. Soil fertility, soil physical properties and crop yield were measured in a 10-m grid. The soils were a Dusky Red Latossol (Oxisol) and a Red Yellow Latossol (Ultisol). Soil sampling was performed in each field every two years after harvesting of the summer crop. Crop yield was measured at the end of each crop cycle, in 2 x 2.5 m sub plots. Data were analysed using semivariogram analysis and kriging interpolation for contour map generation. Yield maps were constructed in order to visually compare the variability of yields, the variability of the yield components and related soil properties. The results show that the factors affecting the variability of crop yield varies from one crop to another. The changes in yield from one year to another suggest that the causes of variability may change with time. The changes with time for the cross semivariogram between phosphorus in leaves and soybean yield is another evidence of this result.es_ES
dc.format.mimetypeapplication/pdf
dc.language.isoenges_ES
dc.publisherInstituto Agronômico de Campinases_ES
dc.relation.urihttp://www.scielo.bres_ES
dc.subjectSpatial variabilityes_ES
dc.subjectKriginges_ES
dc.subjectYield mapes_ES
dc.subjectSemivariogrames_ES
dc.titleAnalysis of the spatial variability of crop yield and soil properties in small agricultural plotses_ES
dc.title.alternativeAnálise da variabilidade espacial do rendimento de culturas e de propriedades do solo em pequenas parcelas agrícolases_ES
dc.typeinfo:eu-repo/semantics/articlees_ES
dc.rights.accessinfo:eu-repo/semantics/openAccesses_ES


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