Soil health and nutrient management

Permanent URI for this collectionhttp://elibrary2.sugarresearch.com.au/handle/11079/13842

Research outcomes: Soil health is improved with a resulting positive impact on the environment and yield growth. Improved reputation and relationship between industry and environmental groups.

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1989 - 198911990 - 19932

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Author: search.filters.author.Reghenzani, JRSubject: search.filters.subject.North Queensland

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    The effect of zinc deficiency as a factor limiting sugarcane growth (SRC Project BS14S - Final Report)
    (1990) Reghenzani, JR
    Results from this project confirm that substantial yield responses to zinc application can be expected in deficient soils in North Queensland. Deficiency is commonly associated with lime application. Three soil and two foliar analytical techniques have been evaluated for detecting zinc deficiency. Currently used critical levels for zinc in cane third leaves have been confirmed as the most reliable index of deficiency. The carbonic anhydrase assay on fresh leaf extracts shows promise for measuring active zinc and providing a rapid and reliable foliar index of zinc deficiency. Critical levels for soil zinc have been established for the standard DTPA extract and for two hydrochloric acid extracts. Both acid extracts are more reliable than the DTPA extract.
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    Extent of zinc deficiency in cane growing soils of North Queensland.
    (1993) Reghenzani, JR
    Collation and interpretation of soil analysis data has shown a strong relationship between soil type and extractable zinc. Extractable zinc in soils followed the order: metamorphic, beach ridge and granite soils < organic and alluvial soils < basaltic soils. More than 15% (18 000 ha) of north Queensland sugarcane soils from Mossman to Ingham were estimated to be at risk from zinc deficiency and associated constrained productivity. This study has identified and mapped low zinc soils and remedial action can now be taken. While alternative zinc forms applied with planting fertiliser have a role, preliminary data from this project does not support a change in the recommended application technique of zinc sulfate heptahydrate, broadcast and incorporated before planting.
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    Evaluation of the effects of rare earth elements on sugarcane in North Queensland
    (1989) Reghenzani, JR
    During 1988 BSES submitted a proposal to the Australian Academy of Technological Sciences and Engineering for partial funding of a research project to investigate the response of sugarcane in North Queensland to rare earth elements. Muswellbrook Energy and Minerals Ltd. agreed to provide the funding required and they succeeded in importing a sample of the Chinese soluble rare earth product, "Nongle". BSES received 200g of the imported product, which was sufficient to establish four field trials. An earlier 10g sample of "nongle" provided by Prof. C. Asher of the University of Queensland was used subsequently in the glasshouse studies.