Soil analysis for pasture

[Woolly]

Had some fields soil analysed by Farming Connect, but what fertilizer do we put on it?

Summary for several fields
pH = 6.1
soil type = SL
Lime requirement (grassland) = 0.0
Extractable Phosphorous = 12 mg/L (Index 1)
Extractable Potassium = 90 mg/L (Index1)
Extractable magnesium = 90 mg/L (Index2)

What should we spread on it (for sheep grazing) and how much/acre?

TIA

 

[milkloss]

Well you won't get much K on because of staggers, that's an autumn job. I would definitely consider something along the lines of fibrophos in the coming autumn.

Although there was no recommendation for lime I would consider it myself if you had a big enough patch to do.

 

[neilo]

I have a lot of pp fields like that, after previous liming. I'm happy to maintain pH at around that as is. If it's purely grazing, the off take will be very low, so needn't put much on. On my similar fields I am putting 125kg/ha (1 cwt/ac) of 0:24:24 on as a maintenance dressing. Fibrophos might be a bit cheaper, but another complication. Planning on trying some Kalfos on those fields this year.

If you do take a hay or silage cut off them, you will need a dollop of K (I will use MOP) to replace it.

Whilst it might be ideal to lift indices & pH further, it's questionable economically IMO.

 

[multi power]

I would put on 50-100 kg an acre of 17 17 17

 

[harperfarmer]

I tend to only worry about the P and K's when cutting for silage and hay. I used to get a bit hung up over them as a lot of our grassland is lower than it should be, but as @neilo said, it's not really that economically viable to do for just grazing land. Maybe if you want to dramatically increase stocking rates perhaps, but still quite a costly process. Our fields still grow grass and come July when we've sold all the lambs, the grass gets less of a hammering anyway. If we were lambing later and on an all grass system then it might be different.

 

[JD-Kid]

whats yer sulphur levels ?? if high i'd just be putting on DAP if needing N or a blend with S in if needed
if N not needed depending on levels of S need would depend on super phosphate used

K if grazeing on site of spreading muck on it i would not be too worryed if selling off farm K will be leaveing

 

[Woolly]

If it's purely grazing, the off take will be very low, so needn't put much on. On my similar fields I am putting 125kg/ha (1 cwt/ac) of 0:24:24 on as a maintenance dressing.

Why no N?
TIA

 

[neilo]

Why no N?
TIA

I'll put that on separately, as urea.

 

[Woolly]

I would put on 50-100 kg an acre of 17 17 17

Can someone explain the numbers to me?
eg what's the difference between 17 17 17 and 15 15 15?
Why would anyone use the 'weaker' one?
TIA

 

[multi power]

Can someone explain the numbers to me?
eg what's the difference between 17 17 17 and 15 15 15?
Why would anyone use the 'weaker' one?
TIA

They are both much the same, the 17 17 17 slightly more concentrated than the 15 15 15
Ie there is 17 units per 50 kg and 17 respectively

 

[JD-Kid]

They are both much the same, the 17 17 17 slightly more concentrated than the 15 15 15
Ie there is 17 units per 50 kg and 17 respectively

per 100 i thought ie the is 17 kg of N 17 of P 17 of K
still no S tho the days of acid rain are well gone ummmm i would be checking

 

[multi power]

per 100 i thought ie the is 17 kg of N 17 of P 17 of K
still no S tho the days of acid rain are well gone ummmm i would be checking

17 kg per 100 is the same as 17 units per cwt
As for sulphur I don't think it's such an issue here due to plenty of slurry

 

[JD-Kid]

17 kg per 100 is the same as 17 units per cwt
As for sulphur I don't think it's such an issue here due to plenty of slurry

then yer should have eneff K in the slurry too animals don't take much K out of the system take more P

 

[multi power]

then yer should have eneff K in the slurry too animals don't take much K out of the system take more P

We always need more k than p

 

[Woolly]

They are both much the same, the 17 17 17 slightly more concentrated than the 15 15 15
Ie there is 17 units per 50 kg and 17 respectively

Should that read:
"Ie there is 17 units per 50 kg and 15 respectively"?

Am I right in thinking that other things being equal (eg cost), one would use the more concentrated fertilizer, and spread less?

TIA

 

[JD-Kid]

Should that read:
"Ie there is 17 units per 50 kg and 15 respectively"?

Am I right in thinking that other things being equal (eg cost), one would use the more concentrated fertilizer, and spread less?

TIA

yep but a low spread rate can also have less prills per meter so not as good coverage if that makes sence it may also be how they get the numbers depending on products used and how they work relese speed etc