canola & nutrient deficiencies - ipnianz.ipni.net/ipniweb/region/anz.nsf/0...diagnosing nutrient...
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Canola & Nutrient
Deficiencies
Rob Norton, IPNI Regional Director ANZ
Nutrition Forum, BCG Expo, July 2011.
Acknowledged Sources, References and
further information
• McCaffrey D, T Potter, S Marcroft, F Pritchard (Eds) (2009). Canola best
practice management guide for southeastern Australia. GRDC.
http://www.grdc.com.au/uploads/documents/GRDC_Canola_Guide_All_1308091.pdf
• Scott S, P Watson(2006) Recognising herbicide residue and drift injury in
canola. Canola Council of Canada.
https://canola-council.merchantsecure.com/canola_resources/product13.aspx
• Hocking P, RM Norton, A Good (1999). “Canola nutrition.”, In Canola in
Australia – the first thirty years. (Eds PA Salisbury, TD Potter, G McDonald,
AG Green). (Organising Committee for the Tenth International Rapeseed
Congress, Canberra). p. 15-22.
http://www.australianoilseeds.com/__data/assets/pdf_file/0019/2704/Chapter_4_-
_Canola_Nutrition.pdf
• Canola Council of Canada (nd) Chapter 9 – Soil fertility, Canola growers
manual.
http://www.canolacouncil.org/contents9.aspx
• Bowden W. (nd) Windrow effects highlight the need for potassium
fertilization.
http://www.potash-info.com/research/researchprojects/Documents/WAWindrows.pdf
Diagnosing nutrient deficiencies
• Nutrient mobility
• Determines if seen in
older or younger
leaves
• Symptoms in older
leaves occur with
mobile nutrients (eg
Nitrogen)
• Symptoms in younger
leaves occur with less
mobile nutrients (eg
Sulphur )
Classic view of N
deficiency
If your crop looks
like this – and there
is rain coming
- then you need to
do some very quick
thinking
S Marcroft, MGP
P Hocking, CSIRO
N response by canola
R Norton, IPNI
Phosphorus
P Hocking, CSIRO
Sulphur
• First seen in NSW at
Lockhart.
• Soils naturally low in S.
• Reduced use of single
super.
• High demand for S by
canola.
• Typically on
– Red Brown Earths
– Leached sands,
– Higher rainfall
T Jensen IPNI
A Good, Incitec Pivot
Sulphur
H Burns, NSW DPI
T Jensen, IPNI
"You guys pair up in groups of
three, then line up in a circle."
Barry Hall, then Sydney Captain at
training
A Johnson IPNI
Calcium deficiency
P Salisbury, Uni of Melbourne
Collapse of youngest stem carrying
flowers.
Most often on low pH soils.
Wetting/drying affects Ca availability.
Mg can be deficient early, most cases
corrects itself with access to subsoil
Mg (NSW information).SU interaction?
D McCaffery, NSW DPIKondinin Group
Potassium deficiency
A Johnston IPNI
A Johnston IPNI
Uncommon in Wimmera & Mallee
• general levels >500 kg K/ha in our soils.
Has been seen on light acid soils
Hay paddocks = much removal
K deficiency on light sands (WA)
2.0 t/ha
0.1 t/ha1.9 t/ha
1.0 t/ha
B Bowden, WADA
Trace Elements
• Both deficiencies and toxicities
• Soil pH a key
• Drought (restricts roots)
• Waterlogging (changes chemical
forms)
• Interactions among nutrients
Deficiencies Mn B Mo Zn
Wet cold soil
Light soils
High pH
Low pH
Peaty soils
Drought
o
*
*
*
*
Boron Deficiency/Toxicity
P Parker NSW DPI
Toxic
Deficient
Zinc & Copper
Classic high pH deficiency
Also under high P use
Bronzing of upper surface of
younger leaves
Canola relatively more
efficient than wheat at getting
soil zinc (Brennan and Bolland 2002)
No confirmed Cu deficiency
for canola reported –
probably able to access Cu
efficiently as well.
B Holloway SARDI
Aluminium toxicity
• Patchy crops
• Low pH soils
• Poorly buffered
soils
• High levels of
exchangeable
Al.
Canola Council of Canada
R Colton NSW DPI
Manganese Toxicity
• Manganese toxicity
• pH < 5.5
• Seasonal waterlogging
• Soils with reducible MnD McCaffery NSW DPI
If it looks like a duck, quacks like a duck,
it probably is a duck?
Aphid damage
Earthmite damage
Cold damage
Alternaria
disease
P Umina Uni of Melbourne
L Turton NSW DPI
R Colton NSW DPI
Canola Council of Canada
Herbicide damage
(see www.canola-council.org)
SU damage (Sulfosulfuron)
Glean damage
imi- damage
Canola Council of Canada
Canola Council of Canada
Canola Council of Canada
Canola Council of Canada