Placing A/S for spring rape
- Thread starter SF1
- Start date
can you be a little more specific in what you want to use? And also what is SOSR?
if AS is 21-0-0-24 and you apply 50 kg that is 12 kg S/ha, which is just a "sniff" of S for rape, even spring. Only if you put it down the spout it might help, but far from enough to our experience.
York-Th.
Sorry,
our experience & numbers are different. I think you are trapping into the GB SO3 trap. On the whole continent we are talking about S = elemental S. From DSV site, here:https://www.dsv-saaten.de/raps/winterraps/duengung/schwefel.html
dass die Zufuhr von 30-50 kg S/ha ausreicht (that the application of 30-50 kg S/ha is sufficient). Now this is S and not SO§.
Sorry, I'm now very pedantic and not polite, but this trap of SO3, which you are falling into, it the major single reason for poor yields in OSR, been it winter or spring OSR on the creates island in the EU. OK, I know that there are a number of writers on TFF which are always claiming that all things are on this island different. But this can of worms I#m not going to open once more.
the banding will not help as it's just not enough, been banded or surface applied.
we do have great success with the combination of banding, 25 to 35 kg/ha of S90 or our propriotory product Elemental S with B and surface application, after emerging of 400 kg of 21-0-0-24.
York-Th.
p.s. you know why you are all talking about SO3? BEcause with SO3 low S numbers in fertilisers look big. And you read reports of OSR growning on the continent where all the S is as S and you think it's the same. Or are they converting the S to SO3 in the reports? Background, my assumption, is that Yara is knnown for a poor own S supply so they have trouble in adding enough S to their N sources. So declare S as SO3 and all looks great. I realise that with this posting I didn't make many friends. I still can pay for my fish & chips & black beer when I come over ;-)
- Location
- Nr Malvern... SW Worcestershire
SF1
I was having a similar conversation with Steve Townsend yesterday regarding spring beans and wheat, the conclusion was to apply about 20% of what you would broadcast in a plough based system.
I was having a similar conversation with Steve Townsend yesterday regarding spring beans and wheat, the conclusion was to apply about 20% of what you would broadcast in a plough based system.
Thanks for your reply York,
It is good to hear your views,that is a different aproach to what we we use here on the 'island'!
Anyway i'm going to experiment.
SF1
- Location
- Mönsterås, Sweden
The recommendation around here is a N/S ratio of 5/1 in osr and 10/1 in cereals.
N:S and NOT N:SO3 ;-)
Even in plant tissue test we see that a N:S ratio better than 10:1 is better, looking on the plants you get.
York-Th.
dontknowanything
Member
- Location
- Cambridge
Last year we put on 110kg/ha of SO3 = 44kg/ha of S on to some wheat. According to Stevie T it still looked deficient (the grain). Our OSR always has this amount, or even a bit more, wouldn't say we set the world on fire with its yields.
is almost as "feeling". And not debatable. Only measured is worth talking.
Why not invest in tissue samples? They are not bankrupting the farm and then you know what is the status. More and more are doing it over here at various stages.
Had a Parsley grower, which is just poring on various mixes, each person walking his fields is telling him a different story. But he is afraid of loosing his crop so he spends heaps of money. But to invest into a tissue te4st to KNOW what is the status....
It's easier to have growers to spend money on a fancy mix = he is happy as it makes the plants green, than to get funds for tissue samples.
How many are monitoring the effectiveness of their sprays with tissue samples? I have on now which does dozens of tissue samples. Always before a foliar spray, then leaving a spot which doesn't get sprayed, and 3 weeks later this zero spot and the field are again tissue samples. You will be surprised how effective this sprays are.
After 2 years of monitoring over 50% of the foliar sprays are history for him.
I'm beeing a little straight, as I know that quiete a number of writers here are fond of foliar sprays. Unless you have done your own monitoring you are deceiving yourself an lying into your pocket.
Just think about it a moment. You never wondered why most foliar sprays have some sort of N in them?
I always thought that farmers are saying they are professionals. When I observe this how decisions are made I can't hinder that my doubts are growing.
York-Th.
dontknowanything
Member
- Location
- Cambridge
where do the desired values for tissue test results come from?
not from me.
We use the once which where published by Prof. W. Bergmann's book in '92. On top of this numbers we look on some ratio's.
Elmstad has published several times some numbers which you also can use. So just look at the archive.
York-Th.
Colin
Member
- Location
- Perthshire
Do quite a lot of testing in the carrots, basically show that during periods of rapid growth and when the roots are bulking there is a shortage in the leaves, tried testing the roots and they had plants of everything. So in the case of high value crops, find out what is short in your soil and feed the soil then also feed the leaves just to make sure. In the case of lower value stuff just find out what you soil is short of and feed the plant appropriately,NPK though the soil, everything else little and often through the leaves. Basically, test, test and test again to get some baseline requirements.