Soil And Plant Testing For Profitable Fertiliser Use

GRDC - Harm van Rees (Cropfacts), Sean Mason (Agronomy Solutions), Dan Bell (Landmark), Therese McBeath, Jackie Ouzman and Rick Llewellyn (CSIRO), Craig Muir (Agrivision). Cropfacts, Agronomy Solutions; Landmark, CSIRO, Agrivision.

Type: Research Paper
Knowledge level: Advanced

Farm Table says:

The authors of this paper note in the conclusion: "Soil nutrient status is highly variable across paddocks and these initial results indicate the benefits of sampling more than one soil type or production zone within a paddock. Preliminary results indicate that intensive soil sampling of production zones can provide significant benefit in terms of P application while results from the N rate application strips had not been analysed at the time of writing." Please access the full paper via the link below if this research interests you.

The take home messages from this GRDC funded research are below. Please access the full paper via the link below for methodology, references, acknowledgements and discussion.

Take key messages from the paper include:

  • Based on more than 300 paddocks surveyed in the southern region, soil phosphorus (P) and soil nitrogen (N) status are highly variable across and within paddocks. In many cases, soil sampling intensity should be increased to sample multiple zones in a paddock.
  • Low production zones tended to have lower soil P and higher soil N levels, and therefore, adjusting nutrient inputs according to zone could improve profitability.
  • An initial paddock analysis of strips trials indicates that intensive soil sampling of production zones provided significant benefits in terms of P application. The yield response was highly variable across the paddock and was closely correlated with soil P status
  • Results from N rate application strips are currently being analysed.

2020 - Australia - GRDC - Harm van Rees (Cropfacts), Sean Mason (Agronomy Solutions), Dan Bell (Landmark), Therese McBeath, Jackie Ouzman and Rick Llewellyn (CSIRO), Craig Muir (Agrivision). Cropfacts, Agronomy Solutions; Landmark, CSIRO, Agrivision.
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