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Registro Completo |
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Biblioteca(s): |
Embrapa Milho e Sorgo. |
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Data corrente: |
13/01/2010 |
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Data da última atualização: |
04/06/2018 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
HURTADO, S. M. C.; SILVA, C. A.; RESENDE, A. V. de; PINHO, R. G. von; INÁCIO, E. dos S. B.; HIGASHIKAWA, F. S. |
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Afiliação: |
Sandro Manuel Carmelino Hurtado, UFLA; Carlos Alberto Silva, UFLA; ALVARO VILELA DE RESENDE, CNPMS; Renzo Garcia von Pinho, UFLA; Euzelina dos Santos Borges Inácio, UFLA; Fábio Satoshi Higashikawa, UFLA. |
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Título: |
Spatial variability of soil acidity attributes and the spatialization of liming requirement for corn. |
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Ano de publicação: |
2009 |
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Fonte/Imprenta: |
Ciência e Agrotecnologia, Lavras, v. 33, n. 5, p. 1351-1359, set./out. 2009. |
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DOI: |
10.1590/S1413-70542009000500022 |
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Idioma: |
Inglês |
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Conteúdo: |
In Brazil, technicians, in most cases, ignore the aspects related to the spatial variability of the soil acidity attributes when liming requirement is calculated. The objective of this study was to validate the liming practice, evaluating the presence of spatial variability of the soil acidity attributes and the existence of areas with differentiated liming requirement, which were calculated by different methods. The experiment was carried out in an area cultivated with corn under conventional management and irrigation. The soil (0-0.2 m) was sampled in a conventional way (composite soil sample) and in a systematic scheme, by use of a grid sampling. In sequence to the soil fertility attributes analysis, it was calculated the liming requirement, according to the methods of SMP pH, aluminum neutralization and elevation of soil Ca and Mg levels, and increase of the soil base saturation. After the descriptive analysis of the data set was accomplished, the semivariograms were calculated and the maps were obtained through the kriging technique. Absence of spatial dependence, as well as the non necessity of limestone application, was observed for the Al neutralization calculation method. Spatial dependence was only verified for the soil acidity attributes and to the liming requirement calculated by the base saturation and SMP pH methods; for these two methods, the semivariogram ranges obtained varied from 35.7 to 200.5 m. The results have highlighted the existence of differentiated liming requirement zones when the variability of the soil acidity attributes was considered in the calculation of the dose and type of limestone to be used for corn soil acidity correction MenosIn Brazil, technicians, in most cases, ignore the aspects related to the spatial variability of the soil acidity attributes when liming requirement is calculated. The objective of this study was to validate the liming practice, evaluating the presence of spatial variability of the soil acidity attributes and the existence of areas with differentiated liming requirement, which were calculated by different methods. The experiment was carried out in an area cultivated with corn under conventional management and irrigation. The soil (0-0.2 m) was sampled in a conventional way (composite soil sample) and in a systematic scheme, by use of a grid sampling. In sequence to the soil fertility attributes analysis, it was calculated the liming requirement, according to the methods of SMP pH, aluminum neutralization and elevation of soil Ca and Mg levels, and increase of the soil base saturation. After the descriptive analysis of the data set was accomplished, the semivariograms were calculated and the maps were obtained through the kriging technique. Absence of spatial dependence, as well as the non necessity of limestone application, was observed for the Al neutralization calculation method. Spatial dependence was only verified for the soil acidity attributes and to the liming requirement calculated by the base saturation and SMP pH methods; for these two methods, the semivariogram ranges obtained varied from 35.7 to 200.5 m. The results have highlighted the existence of differentiated... Mostrar Tudo |
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Palavras-Chave: |
Geoestatística. |
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Thesagro: |
Agricultura de Precisão; Milho; Zea mays. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/31794/1/Spatial-variability.pdf
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Marc: |
LEADER 02459naa a2200241 a 4500
001 1580244
005 2018-06-04
008 2009 bl uuuu u00u1 u #d
024 7 $a10.1590/S1413-70542009000500022$2DOI
100 1 $aHURTADO, S. M. C.
245 $aSpatial variability of soil acidity attributes and the spatialization of liming requirement for corn.$h[electronic resource]
260 $c2009
520 $aIn Brazil, technicians, in most cases, ignore the aspects related to the spatial variability of the soil acidity attributes when liming requirement is calculated. The objective of this study was to validate the liming practice, evaluating the presence of spatial variability of the soil acidity attributes and the existence of areas with differentiated liming requirement, which were calculated by different methods. The experiment was carried out in an area cultivated with corn under conventional management and irrigation. The soil (0-0.2 m) was sampled in a conventional way (composite soil sample) and in a systematic scheme, by use of a grid sampling. In sequence to the soil fertility attributes analysis, it was calculated the liming requirement, according to the methods of SMP pH, aluminum neutralization and elevation of soil Ca and Mg levels, and increase of the soil base saturation. After the descriptive analysis of the data set was accomplished, the semivariograms were calculated and the maps were obtained through the kriging technique. Absence of spatial dependence, as well as the non necessity of limestone application, was observed for the Al neutralization calculation method. Spatial dependence was only verified for the soil acidity attributes and to the liming requirement calculated by the base saturation and SMP pH methods; for these two methods, the semivariogram ranges obtained varied from 35.7 to 200.5 m. The results have highlighted the existence of differentiated liming requirement zones when the variability of the soil acidity attributes was considered in the calculation of the dose and type of limestone to be used for corn soil acidity correction
650 $aAgricultura de Precisão
650 $aMilho
650 $aZea mays
653 $aGeoestatística
700 1 $aSILVA, C. A.
700 1 $aRESENDE, A. V. de
700 1 $aPINHO, R. G. von
700 1 $aINÁCIO, E. dos S. B.
700 1 $aHIGASHIKAWA, F. S.
773 $tCiência e Agrotecnologia, Lavras$gv. 33, n. 5, p. 1351-1359, set./out. 2009.
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Embrapa Milho e Sorgo (CNPMS) |
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| 1. |  | HURTADO, S. M. C.; SILVA, C. A.; RESENDE, A. V. de; PINHO, R. G. von; INÁCIO, E. dos S. B.; HIGASHIKAWA, F. S. Spatial variability of soil acidity attributes and the spatialization of liming requirement for corn. Ciência e Agrotecnologia, Lavras, v. 33, n. 5, p. 1351-1359, set./out. 2009.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 2 |
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