speaking to camera. here we are at Berricks on the Liverpool Plains “Well just planted this using four Janke tynes just here, we’ve one, two, three, four. This has been sown at 10 kilometre and hour and in our area where put our urea we’re we’ve down earlier. We can see gotten rid of most of the we’ve urea over the crop row itself and been some there’s good soil throw into the inter-row area but its pretty cloddy. If we have a look at been happening what’s protected a fair bit of that herbicide in the inter-row we’ve area probably still going to loose a bit of it if it but we’re was Treflan cause its pretty cloddy. going to That’s often happen when dealing with slightly wet soil, that you’re usually happens around planting, and particularly in these heavier vertosol cracking clays.” VOICE OVER: Using a different seeder, a double disc opener with no Slow motion footage of NDF double disc seeder depth wheel, and at the same speed the result clearly indicated this was not an appropriate choice where herbicide incorporation is needed. JOHN CAMERON: can see got very very little soil coverage over “We we’ve the inter-row area so for anything going to gas off, that’s have a high level of volatility like trifluralin not that’s Interviewee kneeling in paddock, moving soil, and protected, expecting poor weed control there. A we’re speaking to camera. little concerned here that still got quite a bit of we’ve herbicide left in the seed furrow or on the sides of the seed furrow itself so also worried about crop we’re selectivity.” TITLE: Factors effecting pre-emergent herbicide efficacy. VOICE OVER: These are the key factors that affect a pre emergent’s DOT POINTS: tillage or no till level and systems… efficacy but look at what typically happens on now let’s evenness of stubble of herbicide binding cover… amount farm. to soil surface crusting or organic matter… clods… rainfall timing and of leaching in sandy amount… degree soils or wet how well herbicides are conditions…
speaking to camera. “Well here we are at Berricks on the Liverpool Plains we’ve just planted this using four Janke tynes just here, one, two, three, four. This has been sown at 10 kilometre and hour and we’re in our area where we’ve put our urea down earlier. We can see we’ve gotten rid of most of the urea over the crop row itself and there’s been some good soil throw into the inter-row area but its pretty cloddy. If we have a look at what’s been happening we’ve protected a fair bit of that herbicide in the inter-row area but we’re probably still going to loose a bit of it if it was Treflan cause its pretty cloddy. That’s often going to happen when you’re dealing with slightly wet soil, that usually happens around planting, and particularly in these heavier vertosol cracking clays.” Slow motion footage of NDF double disc seeder VOICE OVER: Using a different seeder, a double disc opener with no depth wheel, and at the same speed the result clearly indicated this was not an appropriate choice where herbicide incorporation is needed. Interviewee kneeling in paddock, moving soil, and speaking to camera. JOHN CAMERON: “We can see we’ve got very very little soil coverage over the inter-row area so for anything that’s going to gas off, have a high level of volatility like trifluralin that’s not protected, we’re expecting poor weed control there. A little concerned here that we’ve still got quite a bit of herbicide left in the seed furrow or on the sides of the seed furrow itself so we’re also worried about crop selectivity.” TITLE: Factors effecting pre-emergent herbicide efficacy. DOT POINTS: tillage or no till systems… level and evenness of stubble cover… amount of herbicide binding to organic matter… soil surface crusting or clods… rainfall timing and amount… degree of leaching in sandy soils or wet conditions… how well herbicides are VOICE OVER: These are the key factors that affect a pre emergent’s efficacy but now let’s look at what typically happens on farm.
pre-emerg-pt2-final-wpics.docx