An appraisal of nutrient supplies available for tree growth in a pumice soil

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dc.contributor.authorKnight, P.J.
dc.contributor.authorWill, G.M.
dc.date.accessioned2015-02-10T22:30:34Z
dc.date.available2015-02-10T22:30:34Z
dc.date.issued1970
dc.description.abstractChemical analyses have confirmed and explained the results of an earlier pot trial in which the availability of major nutrients in six pumice ash layers of Kaingaroa silty sand was assessed by the growth of radiata pine seedlings. Almost all of the tree-available P is found in the present topsoil: the quantities-of P that occur in two buried soils (Waimihia and Rotoma ashes) are almost entirely in the form of organic P which is apparently very resistant to breakdown due to complexing with allophane. The N in these layers is similarly unavailable. The mineral layers, about 4 ft in thickness (Taupo pumice and lapilli), which lie between the present topsoil and the uppermost buried soil, are very low in total N and P and exchangeable Mg, but relatively high in exchangeable K. Only the lower buried soil contains a reasonable quantity of exchangeable Mg and has a Mg : K ratio in favour of Mg.en_NZ
dc.format.mimetypeapplication/pdf
dc.identifier.citationKnight, P.J. & Will, G.M. (1970). An appraisal of nutrient supplies available for tree growth in a pumice soil. Earth Science Journal, 4(1), 1-16.en_NZ
dc.identifier.urihttps://hdl.handle.net/10289/9164
dc.publisherWaikato Geological Society, The University of Waikatoen_NZ
dc.relation.ispartofseriesEarth Science Journalen_NZ
dc.rights© 1970 Waikato Geological Society, The University of Waikato. All items in Research Commons are provided only to permit fair dealing for the purposes of research or private study. They are protected by copyright with all rights reserved unless otherwise indicated.en_NZ
dc.titleAn appraisal of nutrient supplies available for tree growth in a pumice soilen_NZ
dc.typeJournal Articleen_NZ
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Volume 4, Number 1, 1970