Weed and Herbicide Considerations Contributions from Dr Jack Desbiolles (Ashworth et al., 2010) and Baker et al., (2007) Jack McHugh Jeff Esdaile Tillage and weed germination Residue effect on weeds Herbicide in no till Guidelines for pre emergent herbicide
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Weed & herbicide considerations in conservation agriculture
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Weed and Herbicide Considerations
Contributions from Dr Jack Desbiolles (Ashworth et al., 2010) and Baker et al., (2007)
Jack McHugh Jeff Esdaile
Tillage and weed germination
Residue effect on weeds
Herbicide in no till
Guidelines for pre emergent herbicide
Tillage and weed germination
Germination affected by:
Tillage, Climate & Soil type
Tillage effects microenvironment;
Light, O2, CO2 diffusion, Temp, N and Soil structure
– breaks down dormancy and stimulates germination.
Low soil disturbance disc seeding systems = a shallow weed
seed bank – affected by herbicides, low germination rates &
predation
Deep seed bank - long term seed viability, weed reinfestation
if brought to the surface.
Soil Facts – Saskatchewan soil conservation association 2001