Results from fertilisers
With low soil phosphorus levels at Incitec Pivot Fertilisers’ Marcus
Hill trial site, it was expected that the pasture would respond to
fertilisers such as SuPerfect.
Cumulative dry matter production, 2007-2010
20000
In May 2007, a soil test at the site showed phosphorus levels of
17 mg/kg (Colwell P) with a PBI of 130.
Cumulative dry matter (kg/ha)
A range of fertiliser treatments were applied each autumn and
results measured by dry matter production.
The results show an annual application of SuPerfect at 170 kg/ha
gave significant increases in pasture dry matter production over
four years when compared with a control and also phosphate rock
mixed with elemental sulphur. In addition, while soil phosphorus
levels fell to 14 mg/kg (Colwell P) where no fertiliser was
applied, annual SuPerfect application increased soil phosphorus
levels to 20 mg/kg (Colwell P) over this period.
Soil tests should be taken in all paddocks every three to
five years. If there are any significant changes to paddock
management, it may be worthwhile to test more regularly.
Informed fertiliser recommendations are just as important. They
should include paddock-by-paddock strategies with information
on fertiliser and ameliorant products, rates and application times.
Talk to your Nutrient Advantage Advice accredited agronomist or
contact Nutrient Advantage on 1800 803 453 to ask about soil
analysis today.
4
12000
10000
8000
6000
0
29.8.07
1.8.07
11.10.07 13.8.08
17.10.08 19.6.09 20.08.09 07.10.09 9.11.09
4.7.10
14.9.10
20.10.10
Sample date
Each fertiliser product was applied at 15 kg P/ha. Source: Incitec Pivot
Fertilisers, Marcus Hill, Victoria, 2010.
Soil P levels, Marcus Hill, 2007 - 2010
30
28
26
Colwell P (mg/kg)
The Australasian Soil and Plant Analysis Council (ASPAC)
coordinates inter-laboratory proficiency programs and certifies
laboratories on a test-by-test basis.
14000
2000
Ensure that soil samples are sent