So here in front of us we have two mixtures exactly the same mixtures of
glyphosate, 2,4-D and ammonium sulphate and the outcome is very different.
So one of the bottles show precipitation, the other bottle is a perfect mixture. So
we're going to establish what went wrong here.
The problem is ammonium sulfate and we used dry ammonium sulphate which is the
most commonly used ammonium sulphate in Australia. When you mix it you need a lot
of water. You can't skimp on the water and the other one is you need to give a
time to dissolve. So here we basically used only very little water and we gave
it hardly any time to dissolve. Here we used sixty percent of our tank volume
before we put it in and we gave it plenty of time. So i will redo this and we'll
see the outcome.
Ok so let's start with the high water volume. In this jar test I have here 400
millilitres. I'm working on 700 millilitres which is based on 70 litres
per hectare, one hundred of that and we're looking at sixty percent of our tank
filled.
So that's 400. So I put the ammonium sulphate in.
Generally speaking you should allow for ammonium sulphate to fully dissolve for 10 minutes.
Okay so I'll just now agitate. Ok now this bottle here has been agitated for
10 minutes in a relatively high water volume, at least sixty percent of the tank
filled. Here I probably have only maybe ten percent of the tank filled.
Putting the ammonium sulphate in and we will not give it the maximum time but
instead only maybe 30 seconds or so. Looks relatively ok and now what I'm
doing will be identical in both orders. I put the 2,4-D in.
Bit of a shake, and last but not least we put the glyphosate in. Bit of a shake.
You can already see where we cut corners here with water volume and time and it will finish up having
precipitation on the bottom and we won't be able to reverse it even
if we get it up to our full tank load now and the two basic mistakes we made here:
we used too little water, we didn't use our 60-percent tank fill here, and we didn't
give the ammonium sulphate enough time to dissolve. So i'll give this a little shake.
But if we let it stay for a while you will see how it precipitates to the
bottom. So and here is our final outcome, exactly the same amount of chemical this
mixture here worked perfectly,
this mixture here on the bottom we can see precipitation and the problem
was this mixture was that we didn't have enough water in the tank when we put the
ammonium sulphate in and we hardly get any time to dissolve, so common mistakes in
the field. So if you are mixing dry ammonium sulphate what you really have to do
watch out for is put sixty percent of your tank volume into the tank and give
it 10 minutes to dissolve and you should have no problems. Now in our next video
we're going to talk about the mixing order, because the mixing order is a very
important part of the mixing process as well.