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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1992 - 19963

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Author: search.filters.author.Chapman, LSSubject: search.filters.subject.Urea

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    Improving the efficiency of nitrogen fertilisation of sugarcane under minimum till and trash conservation cultural conditions (Final report SRDC Project BS37S)
    (1992) Chapman, LS; Freney, R; Denmead, OT; Wood, AW; Saffigna, PG
    Objectives of the experiments were (1) Determine the extent of NH3 volatilisation when urea and ammonium sulfate are applied to the surface of a trash blanket in four cane-growing regions. Evaluate the effect of various placements of urea in a trash blanket under wet and dry moisture regimes by quantifying the amount of N recovered in the soil-plant system.
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    Evaluation of nutrient enriched biodunder for sugarcane : a review
    (1995) Chapman, LS
    The review looks at the advantages and disadvantages of fertilising with biodunder\urea compared with applying biodunder and urea separately. The review concludes with 6 recommendations for the use of biodunder\urea\sulfuric acid based on the results of experiments carried out.
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    Project No 2025: Final report bench testing of new nitrogen products for potential ammonia volatilisation: when boradcast onto soil or sugarcane trash (N-gold "A", N-gold "B")
    (1996) Chapman, LS; Haysom, MBC; Makepeace, P
    N-Gold "A" and N-Gold "B" are granulated products containing urea and calcium oxide with 42.4 and 43.2 % N and 1.5 and 1.3 % Ca respectively. When broadcast onto soil or a green cane trash blanket, ammonia volatilisation losses were not different to those from prilled or granulated urea when tested in the maboratory. These products produced a more alkaline solution than urea and, in theory, this would slightly increase the ammonia volatilisation losses, but this did not happen in this experiment.N-Gold "A" and N-Gold "B", when analysed for N content in 0.5g samples, showed more variation than for the prilled or granulated urea. This variation is unlikely to cause any deleterious effects when used as a fertiliser but could have implications for quality control