SimpersTradeCounter
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- Location
- Ely, Cambridgeshire.
That's if anyone's interested ???
Blackgrass friend or foe!!
- Thread starter richard hammond
- Start date
Of course we are.
SimpersTradeCounter
Member
- Location
- Ely, Cambridgeshire.
It should be available to see here. If you want to see any of the photos in full size let me know and I can see if I can get them to you.]
Out of interest, why did you decide to change the pressure & forward speed between the tests? Would be good to see the first test performed at 3 bar & 12kmh also......wouldn't expect wildly differing results, but may show up some vortex effect from the finer droplets & faster forward speed.....?
SimpersTradeCounter
Member
- Location
- Ely, Cambridgeshire.
It was more about testing the effects when trying to achieve 200 l/ha or there abouts' at differing speeds and pressure. The findings were totally counter intuitive as far as we had first thought.
Sorry. I'm being a bit slow this morning. You're saying that the best configuration is the twin cap with 10 degrees forward & 50 degrees backwards?
Why 200 litres/ha? I'd say the most common rate is 100 litres/ha at 12 kph. The logic would dictate that the rearward facing nozzle would be even more important at the higher speed.
Agrovista reckoned that down/backwards with a twin cap was the best configuration for application pre & early post emergence. Syngenta say it's alternating forwards/backwards, though they haven't done much with twin caps & don't have angled nozzles small enough (015) for 100 l/ha work in twin caps.This may have something to do with their previous history of nozzle blockages in bigger 03 angled Hawk nozzles.
Why 200 litres/ha? I'd say the most common rate is 100 litres/ha at 12 kph. The logic would dictate that the rearward facing nozzle would be even more important at the higher speed.
Agrovista reckoned that down/backwards with a twin cap was the best configuration for application pre & early post emergence. Syngenta say it's alternating forwards/backwards, though they haven't done much with twin caps & don't have angled nozzles small enough (015) for 100 l/ha work in twin caps.This may have something to do with their previous history of nozzle blockages in bigger 03 angled Hawk nozzles.
- Location
- Lincolnshire.
Is the problem with controlling bg in cloddy seedbeds all about coverage? Clods imply a more "open" seedbed which IME allows bg to emerge from deeper than 2 inches. My prejudice is that these weeds are the most difficult to control.
SimpersTradeCounter
Member
- Location
- Ely, Cambridgeshire.
Firstly yes 100 l/ha is possibly the most common rate, however that would then bring the size of the jets down too far and cause possible filtration issues.
Secondly down and back or slightly forward and back is visibly by far the best configuration . Alternating will create gaps in your distribution and coverage.
If possible, higher boom heights give double overlap on alternating front/back. On wider booms you can't run low 50 cm boom heights anyway unless your land is like a billiard table!
I'm currently running 025 BBJs on angled caps, alternating direction. You kindly supplied me with them! I might take the forward angled caps off & just fitted the BBJs pointing downwards, leaving the rearward facing ones as they are. In theory it leaves the tips at different heights but in the real world of 30m booms on undulating ground I can't see it being a problem. I run AI nozzles because I simply don't have enough time to wait for perfect spraying weather with the workload I have. Any views?
I'm currently running 025 BBJs on angled caps, alternating direction. You kindly supplied me with them!
I might take the forward angled caps off & just fitted the BBJs pointing downwards, leaving the rearward facing ones as they are. In theory it leaves the tips at different heights but in the real world of 30m booms on undulating ground I can't see it being a problem. I run AI nozzles because I simply don't have enough time to wait for perfect spraying weather with the workload I have. Any views?
SimpersTradeCounter
Member
- Location
- Ely, Cambridgeshire.
As you say @Brisel AI jets pointing straight down as all machines are manufactured is the optimum for the season, as perfect spray days are few and far between. However the 50º-10º twin configuration with standard jets rearward facing looks to be the way that you may get better coverage especially pre em.
The problem with raising your boom too high in real life situations is that the drift will be a lot heavier and therefore less product will hit the target, so keeping the boom at a level of 50-70cm above target is best, but you know that already. So from what we've seen, if you alternate forward-backward, the forward facing jets will possibly leave gaps in your overall coverage.
The problem with raising your boom too high in real life situations is that the drift will be a lot heavier and therefore less product will hit the target, so keeping the boom at a level of 50-70cm above target is best, but you know that already. So from what we've seen, if you alternate forward-backward, the forward facing jets will possibly leave gaps in your overall coverage.
Yup. Spend less on flash kit and gear. Get better seedbed. Got to get the basics right.
- Tags
- blackgrass