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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Item 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, PGObjectives 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.Item Report on evaluation of nutrient enhancement of biodunder for cane growth(1992) Chapman, LSThree yield trials were conducted to evaluate strategies for the use of biodunder as a fertiliser for sugarcane. Cane growth in the trials was adversely affected by the weather, which was dry in summer, followed by exceptionally heavy and prolonged rainfall, and then drought conditions in autumn and winter. Under these abnormal conditions cane yield was lower than normal. The conclusions drawn from the results of these trials must therefore be extrapolated with caution, for they may not apply to more normal growing conditions.Item Project 921 - rates of biodunder for sugarcane : final report(1995) Chapman, LSThe BSES recommendation for a maximum application rate is considered adequate to maximise returns and production for ratoon crops on the majority of Mackay soils. As the experiments were conducted only on ratoon crops, no evidence is available to allow comment on the fertiliser K requirements of plant cane. The use of biodunder on caneland is highly recommended as an environmentally friendly way of recycling plant nutrients, thereby reducing fertiliser costs, reducing imports of fertilisers and increasing cane production and profitability.Item Evaluation of nutrient enriched biodunder for sugarcane : a review(1995) Chapman, LSThe 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.Item 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, PN-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 controlItem Evaluation of biostil dunder and mixtures with nitrogen fertilisers for sugarcane nutrition(1990) Chapman, LS; Usher, JFThe aims of this project were: (a) to measure the cane and sugar yield responses from the application of biostil dunder on its own and in mixtures with nitrogen fertilisers in field trials; and (b) to assess the suitability of these treatments for sugarcane nutrition. These treatments relate to a possible management strategy on cane farms, ie to broadcast sufficient phosphorus fertiliser on fallow land for the crop cycle, and then use a mixture of dunder and nitrogen fertilisers to provide the total N and K requirements for each crop in a single field application.