Using Biological farming practices to grow the best …...Using Biological farming practices to grow...
Transcript of Using Biological farming practices to grow the best …...Using Biological farming practices to grow...
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De Bortoli Wines
Yarra Valley Vineyards
Using Biological farming practices to grow
the best grapes efficiently, safely and sustainably
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Soil Management using Biological Farming Techniques
What is Biological farming?
Why we implement it on our farms
How we utilise and encourage organisms to work for us to improve soil
health and vine health
Outcomes since implementation in spring 2008
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What is Biological Farming?
Biological Farming is seeking a biological remedy before we consider a physical
or chemical approach.
We amend our systems to enable living organisms to alter a situation to our
desired state.
We monitor as best we can the impact of Biological farming.
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Soil Biology
Microbiology
Bacteria
Fungi
Protozoa
Nematodes
Macrobiology
Worms
Ants
Grubs
Plants
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Why do we use biology to manage soil characteristics?
We considered the ecosystems where wild vines grow naturally
What was our farms natural system, and what state is it in now?
How can we best reconcile the differences between the natural system and
our agriculture system to allow each vine to best express its wine characteristics
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What dictates the default state of an ecosystem?
Geology
Soil Type
Temperature range
Rainfall
Seasonality
Topography
Aspect
Biology types and forms are selected
based on system parameters
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How we encourage soil biology to grow better grapes
We create the best physical environment possible for desired biology growth
We start at the bottom of the food chain
We push the system via inoculum and food sources
We create symbiotic relationships wherever possible
We try to minimise acts that destroy the desired biology
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Soil Physical State
Structure
Porosity
Water movement and retention
Reduce compaction
Permanent vegetation coverage
Minimal cultivation
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Compaction minimisation
Controlled traffic rows
Doing more than one operation
Double row equipment
Over row equipment
Soil Puffer
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Inoculum and Food sources
Compost
Compost Tea
Bacterial Foods
Fungal Foods
Protozoa
Nematodes
Earthworms
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Compost
We try to make a fungal compost
We primarily use plant materials
Recipe is 25% Grape marc (high N), 15% Hay (med C:N ratio) and 60%
Wood chips (High C)
We let the temp get to 65 degrees and then turn it so it has enough O2
We turn until the temp stops climbing to 65 degrees this usually takes 10-16 weeks
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Cost of Making Compost
Grape Marc $0 25% $0
Hay $0 to $10 15% $1.50
Wood chips $8 to $14 60% $8.50
Making Piles $2.50
Turning Piles $0.50
Total for 1 M cubed of Compost = $13.00
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Compost Tea
Uses biology in Compost and encourages that biology to multiply in a liquid
phase
Must have adequate oxygen levels to allow anerobic organisms to dominate
Must add foods for organisms
Can brew at ambient or elevated temps up to about 32 degrees
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Compost Tea Recipe & Cost
20L of compost For 1000L $0
4 handfuls of forest fungi $0
3L of Kelp food $36
3L of Fish food $30
400ml of Aloe Vera juice $4
Power 24 to 48 hours $10
Total is $80 for 1000L (8 cents a L)
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Compost tea application
40L Tea/Ha $3.20
5L Kelp $20
5L Fish $9
Total Cost $/Ha $32.20
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The Theory Bacteria have a C:N ratio of 5C molecules to 1N molecule. Protozoa Flagelates consume bacteria, but their natural state is 30C:1N molecule so to get 30C they consume 6 bacteria but have excess of 5N. The extra N is expelled as NH4. For other nutrients such as Ca, P, K they are expelled in chelated form, plant available but not leachable.
Protozoa consume 10000 bacteria a day in good conditions releasing 8000N molecules. This equates to 7ng per cm cubed of root soil per day, plants only require 0.2ng of N per day. Excess N is used by bacteria in healthy soils for growth, so the N in healthy soils stays in living organisms and no N is lost from the system.
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Tracking changes & outcomes
Soil physical, biological and chemical properties
Vine health and petiole nutrients
Try to identify trends that have occurred
Same blocks, same time of year, same sampling method, same lab
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Compaction
0
500
1000
1500
2000
2500
3000
3500
Drip Line Wheel Track Mid row Wheel Track Drip Line
Non Travel Rows
70-80 cm
25-35 cm
10-15 cm
0
500
1000
1500
2000
2500
3000
3500
Drip Line Wheel Track Mid row Wheel Track Drip Line
Travel Rows
70-80 cm
25-35 cm
10-15 cm
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Organic matter
0
0.25
0.5
0.75
1
1.25
1.5
1.75
2
2.25
2.5
2.75
3
3.25
3.5
3.75
4
4.25
4.5
4.75
5
5.25
5.5
5.75
6
2010 2009 2010 2011 2012 2013
Organic Matter %
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pH
0
0.25
0.5
0.75
1
1.25
1.5
1.75
2
2.25
2.5
2.75
3
3.25
3.5
3.75
4
4.25
4.5
4.75
5
5.25
5.5
5.75
6
6.25
6.5
6.75
7
7.25
2008 2009 2010 2011 2012 2013
Soil pH
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Soil Fungi Biomass
0
50
100
150
200
250
300
350
400
450
Autumn
2008
Spring 2008 Autumn
2010
Spring 2010 Autumn
2011
Spring 2011 Autumn
2012
Spring 2012 Autumn
2013
Spring 2013 Autumn
2014
Average total Soil Fungi Biomass ug/g
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Soil fungi biomass to Bacteria biomass ratio
0
1
2
3
4
5
6
7
8
9
Autumn
2008
Spring 2008 Autumn
2010
Spring 2010 Autumn
2011
Spring 2011 Autumn
2012
Spring 2012 Autumn
2013
Spring 2013 Autumn
2014
Soil Fungi Biomass to Bacteria Biomass Ratio
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Total Soil Ca
0
500
1000
1500
2000
2500
3000
3500
4000
4500
Spring 2009 Spring 2010 Spring 2011 Spring 2012 Spring 2013
Average Soil Calcium for All Blocks
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Soil Available Ca
0
200
400
600
800
1000
1200
1400
1600
1800
Spring 2008 Spring 2009 Spring 2010 Spring 2011 Spring 2012 Spring 2013
Average Soil Available Calcium For All Blocks
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Petiole Ca
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
Spring 2008 Spring 2009 Spring 2010 Spring 2011 Spring 2012 Spring 2013
Average Petiole Calcium For All Blocks
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Non
Available
soil Ca
73%
Available soil
Ca
27%
Spring 2009
Non
Available soil
Ca
59%
Available soil
Ca
41%
Spring 2013
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Total Soil P
0
100
200
300
400
500
600
Spring 2009 Spring 2010 Spring 2011 Spring 2012 Spring 2013
Average Soil Phosphorus for All Blocks
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Soil available P
0
2
4
6
8
10
12
14
Spring 2008 Spring 2009 Spring 2010 Spring 2011 Spring 2012 Spring 2013
Average Soil Available Phosphorous For All Blocks
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Petiole P
0
0.1
0.2
0.3
0.4
0.5
0.6
Spring 2008 Spring 2009 Spring 2010 Spring 2011 Spring 2012 Spring 2013
Average Petiole Phosphorus For All Blocks
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Non
Available soil
P
99%
Available soil
P
1%
Spring 2009
Non
Available soil
P
98%
Available soil
P
2%
Spring 2013
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Total Soil K
0
200
400
600
800
1000
1200
Spring 2009 Spring 2010 Spring 2011 Spring 2012 Spring 2013
Average Soil Potassium For All Blocks
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Soil Available K
0
20
40
60
80
100
120
140
160
180
200
Spring 2008 Spring 2009 Spring 2010 Spring 2011 Spring 2012 Spring 2013
Average Soil Available Potassium For All Blocks
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Petiole K
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
Spring 2008 Spring 2009 Spring 2010 Spring 2011 Spring 2012 Spring 2013
Average Petiole Potassium For All Blocks
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Non
Available soil
K
88%
Available soil
K
12%
Spring 2009
Non
Available soil
K
87%
Available soil
K
13%
Spring 2013
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Soil Available Nitrate
0
5
10
15
20
25
30
Spring 2008 Spring 2009 Spring 2010 Spring 2011 Spring 2012 Spring 2013
Average Soil Available Nitrate For All Blocks
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Soil Available Ammonium
0
5
10
15
20
25
30
35
40
Spring 2008 Spring 2009 Spring 2010 Spring 2011 Spring 2012 Spring 2013
Average Soil Available Ammonium For All Blocks
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Petiole N
0
0.5
1
1.5
2
2.5
Spring 2008 Spring 2009 Spring 2010 Spring 2011 Spring 2012 Spring 2013
Average Petiole Nitrogen For All Blocks
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Soil Available
Nitrate
88%
Soil Available
Ammonium
12%
Soil Available N Spring 2008
Soil
Available
Nitrate
22%
Soil Available
Ammonium
78%
Soil Available N Spring 2013
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Earthworms Mil/Ha
0
2
4
6
8
10
12
14 Earthworms (millions) per hectare
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Vine Balance
We monitor internode length
We monitor cane length for mm per infloresence
We monitor cane length and mass in mm per gram
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D3 Sauv Blanc
Replanted after 25% was burnt in 2009
Flat Alluvial soil
Duplex soil with heavy clay and sodic sub soil
Water logs very easily
Compaction layer at 40 to 50cm
We have used soil aerator and banded compost under vine at 1m3/20m of row
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D3 Sauv blanc 2009 2013/14
Organic Matter 4.9 6.8
Soil pH 5.84 6.23
Earthworms 0 65
Soil Fungi Biomass 216 236
Fungi:Bacteria 0.16 2.31
Total Na 182 113
Soil Avail Na 153 63
Petiole Na 0.04 0.03
Total Ca 2215 2929
Soil Avail Ca 874 1002
Petiole Ca 0.81 0.84
Total P 250 442
Soil Avail P 0.5 8.7
Petiole P 0.16 0.31
Total K 975 1560
Soil Avail K 98 324
Petiole K 5.54 4.26
Soil Avail NO3 29.7 6.7
Soil Avail NH4 20.4 23
Petiole N 1.33 2.62
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Things we are still working on:
Using biology on foliage to protect against
downy and powdery mildews
Establishing permanent undervine plants
Increasing the length and activity of soil
biology in the spring and autumn
Improving nematode diversity and numbers
Improving mycorrhiza establishment
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