Assessment of plant-available boron in some New Zealand soils
Open Access
- 1 April 1983
- journal article
- research article
- Published by Taylor & Francis in New Zealand Journal of Agricultural Research
- Vol. 26 (2), 191-195
- https://doi.org/10.1080/00288233.1983.10427059
Abstract
The boron (B) status of yellow-brown pumice and other soils was determined by a sunflower test and by hot water (HWS B) and ammonium acetate (NH4Ac B) extractions. Plant-available B in pumice soils was higher in soil from lucerne paddocks than from pasture because B fertiliser had been applied to the lucerne. In soils under both lucerne and pasture, available B was highest in the surface layer and decreased with depth. The available B in soil samples under pasture was much lower on yellow-brown pumice soils than on other soils. Hot-water extraction gave the same indication of B status as sunflowers for all soils, but NH4Ac did not. Pumice soils are low in B and fertiliser B is necessary when crops with high B requirement are grown. Hot-water extraction is a reliable and satisfactory method for determining available B in these soils.Keywords
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