Early blight in solanaceous crops—2 years Black rot in cucurbits—2+ years Blackleg in brassicas—3-to-4 years Fusarium wilt in peas—4-to-5 years Clubroot in brassicas—7 years White rot on alliums—20 years
Green Fallow Early Vegetables Green Fallow Late Vegetables In-season Rotation Cannon Plots
2011 Early Vegetables 2012 Green Fallow 2013 Late Vegetables 2014 Green Fallow 2011 Green Fallow 2012 Early Vegetables 2013 Green Fallow 2014 Late Vegetables 2011 Late Vegetables 2012 Green Fallow 2013 Early Vegetables 2014 Green Fallow 2011 Green Fallow 2012 Late Vegetables 2013 Green Fallow 2014 Early Vegetables In-season Rotation History Cannon Plots Field A-1 Field A-3 Field A-2 Field A-4
1. Weaken Bermudagrass through: a) Winter Tillage (with no delay in organic certification) or, b) Glyphosate suppression (36–month transition to organic status required) 2. Establish a weed-suppressive summer cover crop of sudangrass or sorghum-sudangrass as early as conditions allow. Use high recommended seeding rates plus 10%. Or more 3. Mow shortly before seed heads emerge using a rotary bushhog or flail mower—shredding the vegetation while leaving tall stubble. Alternatively, flash graze with ruminant stock, leaving long stubble. 4. Shortly before seed heads emerge again, repeat #3. Leave tall stubble if no fall tillage is planned; leave short stubble if planning to till. 5. Plant a winter cover crop after September 1 st when conditions permit. 6. In spring, mow and incorporate the winter cover crop and prepare the soil for planting. 7. Plant or transplant vegetables no sooner than 2 weeks after the winter cover crop has been plowed-in. Summary of Steps for Converting from Bermudagrass to Organic Vegetables with Annual Grass Sorghum
Green Fallow Vegetables Green Fallow VegetablesBermudagrass Advancing & Receding From the Field Edges
— An Old Saying among Organic Farmers Organic Soil Management
2005 National Center for Appropriate Technology Life in the Soil
2005 National Center for Appropriate Technology The Soil Food Web
GK’s College Soil Texts Soil Fertility and Fertilizers. Tisdale & Nelson. 1966. One passing mention on p. 506. The Nature and Properties of Soils. Brady. 1974. Two- page discussion. Soils: An Introduction to Soils and Plant Growth. Donahue, Miller, & Shickluna. 1977. Three pages. The Soil and Health: A Study of Organic Agriculture. Albert Howard. 1947. Thirty pages!!
Biologically Healthy Soil Rotations Cover Crops Organic Cultural Practices Compost, Compost Teas, Mulching Off-Farm Inputs Org Fertilizers & Pesticides GoodOrganicCrops OrganicConservationTill, Living Living Mulches & Mulches & Plastic Mulch
A Proposed Perennial Plan #1 Field A3: On-Going Blackberries plus 5% perennial beneficial habitat Early Vegetables→Green Fallow→Late Vegetables→Green Fallow→Repeat Elderberries plus 5% perennial beneficial habitat Asparagus plus 5% perennial beneficial habitat Bermudagrass Conservation Strip Green Fallow→Early Vegetables→Green Fallow→Late Vegetables→Repeat Late Vegetables→Green Fallow→Early Vegetables→Green Fallow→Repeat Green Fallow→Late Vegetables→Green Fallow→Early Vegetables→Repeat
RESILIENCE SYSTEM DESIGN AND MANAGEMENT FOR ORGANIC, TRANSITIONAL, AND SUSTAINABLE VEGETABLE GROWERS NRCS CONSERVATION INNOVATION GRANT (CIG) AWARD #69-3A75-11-199 Bioextensive Systems Mgt. Crop Rotations Cover Crops Soil Food Web Organic No-till Composting & Vermicomposting Compost Teas & Extracts Indigenous Microorganisms (IMO) Effective Microorganisms (EM) Biochar
Thanks for your attention attention! George Kuepper The Kerr Center P.O. Box 588 Poteau, OK 74953 email@example.com://www.kerrcenter.com/
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