Soil – Plant - Compost Assistance and Customer... · Inadequate attention to biology (organic...
Transcript of Soil – Plant - Compost Assistance and Customer... · Inadequate attention to biology (organic...
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Soil – Plant - Compost
William F. BrintonWoods End Research Laboratory
Reports available at: www.woodsend.org
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What is Soil Quality?
Capacity of a specific kind of soil to function, within natural or managed ecosystem boundaries, to sustain plant and animal productivity, maintain or enhance water and air quality, and support human health and habitation.
NRCS Soil Quality Institute
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Challenges to Soil Quality
Improper tillage (timing/tools).Inadequate nutrient supply.Excessive nutrient supply.Inadequate attention to biology (organic matter supply).Contamination from industrial or other sources.
Woods End Research Laboratory, Inc.
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The “integrated soil”Open crumb structureMed-low bulk-densitySufficient nutrientsOrganic-rich
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Compacted Soils …
Root expansion difficultConcentation of chemicals in top layersRequire more energy for tillage
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Soil texture revealed
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Soil Pene-trometer
Test
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Soil (= Roots+Microbes) Root/mineral interface hard to separateRoot-microbe interface= active nutrition
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Compost ≈Roots : Soil
Fine root hair development shows different relationshipCompost increases inter-relationship of root to soil.Compost favors plant important microorganisms.
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Mycorrhizae Associations …
Grapevine rootstocks benefit enormously from AM associationsNegatively affected by fumigation and fertilizers
Woo
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List of benefits …
Plants better tolerate stressful conditions, such as lack of water and high salt levels.Plants can be more successfully transplanted into poor or marginal soils.Plants need less fertilizing and irrigation .Plants may bear fruit at an earlier age and support heavier crops.
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Other benefits to systems “approaching natural”
Soil system does not “force” yield (ref; Terroir )Better control of plant development (e.g. pruning)Natural disease suppressionHigher fruit quality
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Disease Control via Soil-media
Soils lacking active micro-flora may not be able to adequately control common pathogens.Organic matter supply and compost furnish benefits.
Woods End Research Laboratory, Inc.
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Compost triggers disease suppression
Soil mediated effects;Direct foliar“phyllosphere” effects;Indirect systemiceffects.
Woods End Research Laboratory, Inc. Left: Control; Right /Microbially active soil
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Microbial Vineyard HygieneFall spread compost increases litter decomposition;Compost reduces spring ascospore germination
0
25
50
75
100
LitterA
sco/cm2
Asc/Spr.
Control
CompostPlots
Decaying leaf surface coated with micro-organisms
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Pomace + Manure Compost
C:N pomace = 25 but pH < 5.0 (v. low)
CN manure/bedding 21-26 with pH > 8.o1:1 mixtures make excellent compost.
Woods End Research Laboratory, Inc.
( N= 2.2% P=1.7 K=2.8
OM= 43% pH = 8.4* )
* Results: Benziger Family Vineyard
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Roots of Quality Concernsof “waste” compost inputs
Rapid growth of compost industry in 60’s-70’s;Contamination from MSW composts: plastic, metal, PAH’s, PCB’s;Grower concerns of poor image, soil effects.
MSW Compost Soil in French Vineyard 1994
Woods End Research Laboratory, Inc.
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Contamination seen microscopically ….
Fine Fraction of Compost with plastic residues from mixed-waste compost
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A Holistic View of Compost“form + function”
Ingredients & conditions togetherdetermine quality of product.“Minimum interference” appropriate.
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Process vs. technology …
“Lo-Tech” Swiss pile
Hi-tech turned windrow
In 2 studies, time to maturity varied less than 25 days
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Organic matter decomposition .. drives the soil life-cycle
Humus formed by microbial & chemical processes over time
Adequate OM supply leads to microbes 2-3 magnitudes higher than background
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30x
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Leading to plant stimulation.
Humic substances formed;Growth promoting bacteria;Stimulation of natural defenses;Disease suppression;Slow nourishing.
Control Soil With CompostWoods End Research Laboratory, Inc.
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Natural Control of N- release
05
1015202530354045
Day 0 Day 10 Day 20 Day 40 Day 60
Mature CompostChemical NPKRaw Manure
Max growth period
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Increase of soil biological activity
Soil biological activity indicates organic-microbial turnover.Correlates with soil-quality and N-release.Used in USDA’s soil-quality test methods.
Woods End Research Laboratory, Inc.
Woods End’s Solvita Soil Test Kit
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The Soil Quality Triad
Physical condition
Biological condition
Chemical/Nutrient Condition
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Healthy soils do not push yield.Soil biology favors interactions
of the plant-:-soil-:-root environment.
Woods End Research Laboratory, Inc.
Soil Quality and Terroir
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Woods End Research LaboratoryPO Box 297 – 20 Old Rome Road
Mt Vernon Maine 04352www.woodsend.org
Compost AnalysisNew Product DevelopmentSolvita Test kits