csbp 2014 trial highlights west midlands group. 2014 trial program
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CSBP 2014 Trial HighlightsWest Midlands Group
2014 Trial Program
•WMG - nitrogen inhibitor trial
•Carnamah - K strategies trial
•Bolgart - long term K * lime trial
WMG Trial 2014
Aim
•To determine the value of urease inhibitors applied with urea and Flexi-N
Harvest Results
Summary
• Very strong and profitable response to 30 kg N (300% + ROI)
• No responses to urease inhibitors.
• Rain within 2 days of N application reduced any volatilisation.
• CSBP will continue to look at innovative products in the aim of increasing fertiliser use efficiency
Increasing K fertiliser use efficiency
Carnamah 2014
Depth K 0-10 35
10-20 16 20-30 <15 30-40 <15
Carnamah 2014
Treatment
IBS Banded Banded Z23
Trt (kg/ha) (L/ha) (kg/ha) (L/ha) N P K
1 - - - - 0 0 0
2 - - 89 Big Phos - 0 12 0
3 - 50 Flexi-N 85 Agstar Extra 65 Flexi-N 60 12 0
4 - 54 Flexi-N 100 K-Till Extra 65 Flexi-N 60 12 11
5 - 54 Flexi-N 118 'Hi K-Till Extra' 65 Flexi-N 60 12 20
6 40 MoP 50 Flexi-N 85 Agstar Extra 65 Flexi-N 60 12 20
7 80 MoP - 89 Big Phos - 0 12 40
8 80 MoP 50 Flexi-N 85 Agstar Extra 65 Flexi-N 60 12 40
Trial Design
Carnamah 2014
K uptake – 8 July
Carnamah 2014
Wheat Yield
Carnamah 2014
Nitrogen Use Efficiency
Carnamah 2014
Water Use Efficiency
Bolgart 2011- 2014
Bolgart 2011
pH PBI K Al
0-10 5.2 42 25 1
10-20 4.2 38 15 6
20-30 4.2 36 17 9
30-40cm 4.3 36 15 8
Soil Test Results
Bolgart
Trial Design
Lime K Fertiliser 2011 & 2014 2011, 2012, 2013 and 2014 Annual K
Trt (t/ha) (kg/ha) (kg/ha)1 - - 02 - 140 K-Till Extra 153 - 60 MoP 304 - 120 MoP 605 3.2 + 2.6 - 06 3.2 + 2.6 140 K-Till Extra 157 3.2 + 2.6 60 MoP 308 3.2 + 2.6 120 MoP 60
Bolgart 2011
Wheat Yield
Bolgart 2012
Wheat Yield
Bolgart 2013
K uptake to 13 July
Bolgart 2013
Sowing Date
Bolgart 2013
Wheat Yield
Bolgart 2014 - wheat
Lsd K 0.27*** Lsd Lim 0.19**
Wheat Yield
Bolgart 2013
Bolgart 2013
Ryegrass Population
Bolgart 2013
Soil K – Autumn 2013
Key Findings
• K-Till banded is more efficient than top dressed MOP.
• Dry conditions limit the effectiveness of topdressed K
• Good K supply will increase nitrogen and water use efficiency
• Applications of K fertiliser to deficient paddocks can reduce ryegrass
populations
• Large amounts of K are needed to increase soil levels.