Nelima doriae (Canestrini), a south European harvestman in Australia and New Zealand (Arachnida, Opiliones, Phalagiidae) Journal Paper
- Author
- Gruber, J.; Hunt, G.S.
- Year
- 1973
- Journal / Source
- Australian Museum
- Volume
- 28
- Pages
- 383-392
- Summary
- Soils of the North Island have been examined for their molybdenum content. Wide variations in levels of molybdenum extracted by acid ammonium oxalate have been found for individual soil sets, but some important differences are noticeable between genetic soil groups. Total molybdenum levels in certain North Auckland soil suites are shown to decrease as the soils become more leached. In a comparison of sedimentary rocks, mudstones give soils higher in acid-oxalate-soluble molybdenum than do sandstones or greywackes. In the volcanic and igneous groups, yellow-brown loams from andesitic and rhyolitic ash are generally much higher than yellow-brown pumice soils from rhyolitic ash. Immature basalt soils have high levels of available molybdenum. Some correlations have been shown with the type of clay minerals in the soils. Response of P1lSture to molybdate topdressing has been discussed in relation to the different soil groups. A comparison of soil test levels and pasture responses has shown that acid ammonium oxalate is not reliable for diagnosing deficiencies in that it extracts a portion of the iron-bound molybdate which would not be available to plants.
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