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.