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Registro Completo |
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Biblioteca(s): |
Embrapa Tabuleiros Costeiros. |
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Data corrente: |
21/12/1995 |
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Data da última atualização: |
04/01/2012 |
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Autoria: |
WHITE, R. E.; HAYDOCK, K. P. |
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Título: |
Phosphate availability and phosphate needs of soils under Siratro pastures as assessed by soil chemical tests. |
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Ano de publicação: |
1958 |
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Fonte/Imprenta: |
Australian Journal of Experimental Agriculture and Animal Husbandry, v. 8, p. 561-568, 1958. |
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Idioma: |
Inglês |
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Conteúdo: |
Soil tests for phosphorus are many and varied (Bingham 1962) and the choice of a particular test method for any one laboratory or region is more often governed by the historical development of the test than by a critical appraisal of the methods available. In any rational approach to testing for the availability of soil phosphorus it must be recognized that both intensity (I) and quantity (Q) factors interact to determine the soil's phosphate supplying power to the plant; that the various chemical extractants provide a composite estimate of I and Q, the balance between the two factors being influenced by the experimental conditions such as extractant: soil ratio, the pH of the extracting solution, the period of contact with the soil (Williams 1962); and, thirdly, that the information provided by such a soil test is essentially qualitative, and is not necessarly related to the amount of phosphorus that needs to be added to the soil to promote optimum plant growth. |
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Palavras-Chave: |
Fertilização; Fertilization; Pastagens; Pasture; Solos. |
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Thesagro: |
Fósforo; Siratro. |
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Thesaurus Nal: |
phosphorus; soil. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01686naa a2200241 a 4500
001 1365827
005 2012-01-04
008 1958 bl --- 0-- u #d
100 1 $aWHITE, R. E.
245 $aPhosphate availability and phosphate needs of soils under Siratro pastures as assessed by soil chemical tests.$h[electronic resource]
260 $c1958
520 $aSoil tests for phosphorus are many and varied (Bingham 1962) and the choice of a particular test method for any one laboratory or region is more often governed by the historical development of the test than by a critical appraisal of the methods available. In any rational approach to testing for the availability of soil phosphorus it must be recognized that both intensity (I) and quantity (Q) factors interact to determine the soil's phosphate supplying power to the plant; that the various chemical extractants provide a composite estimate of I and Q, the balance between the two factors being influenced by the experimental conditions such as extractant: soil ratio, the pH of the extracting solution, the period of contact with the soil (Williams 1962); and, thirdly, that the information provided by such a soil test is essentially qualitative, and is not necessarly related to the amount of phosphorus that needs to be added to the soil to promote optimum plant growth.
650 $aphosphorus
650 $asoil
650 $aFósforo
650 $aSiratro
653 $aFertilização
653 $aFertilization
653 $aPastagens
653 $aPasture
653 $aSolos
700 1 $aHAYDOCK, K. P.
773 $tAustralian Journal of Experimental Agriculture and Animal Husbandry$gv. 8, p. 561-568, 1958.
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Registro original: |
Embrapa Tabuleiros Costeiros (CPATC) |
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