Fertiliser and soil samples

hugo29

If soil samples show index 3 for K and index 1 & 2 for P what is a good fertiliser to apply,

Also any idea as to how much of an increase there is to PH after spreading 2 ton lime per acre

Is 6.2 target ph

Thanks

Conmaicne Mara

2.5 ton per acre will raise ph by 0.4 I think (I know you said 2 ton so a bit less).

bob charles

hugo29 wrote: »

If soil samples show index 3 for K and index 1 & 2 for P what is a good fertiliser to apply,

Also any idea as to how much of an increase there is to PH after spreading 2 ton lime per acre

Is 6.2 target ph

Thanks

fert for grass, silage or what

Regarding Ph correction - it really depends on your soil as they can be complex out so a re soil test 12 months after spreading is best to see what is happening. with the increase in Ph there is a good chance it will make plenty more P available so maybe no need to apply depending on levels and if you need performance now and not next year

hugo29

bob charles wrote: »

fert for grass, silage or what

Regarding Ph correction - it really depends on your soil as they can be complex out so a re soil test 12 months after spreading is best to see what is happening. with the increase in Ph there is a good chance it will make plenty more P available so maybe no need to apply depending on levels and if you need performance now and not next year

Cheers, will re test next spring, Mixture one part is grassland, one part silage,
Silage ground can wait till next year, could do with response on grazing ground now

bob charles

hugo29 wrote: »

Cheers, will re test next spring, Mixture one part is grassland, one part silage,
Silage ground can wait till next year, could do with response on grazing ground now

Applying P now wont have much of a benefit if any as temps are high and whatever P in the ground is available. P shortages really only occur in grassland at the being of the year when temps are down or during cold periods. What is your average P figure. Depending on when you spread the lime you should be starting to see a response, say if you spread in spring

tim04750

16% superphospate 0,16,0, you'll get a good response on index one's and low two's
or classic NP which is which is 25,4,0, more of a top up type fertilizer.

blue5000

bob charles wrote: »

Applying P now wont have much of a benefit if any as temps are high and whatever P in the ground is available. P shortages really only occur in grassland at the being of the year when temps are down or during cold periods. What is your average P figure. Depending on when you spread the lime you should be starting to see a response, say if you spread in spring

Agree with this, but applying P now should help keep grass growing into the autumn for longer. Hugo can you get any pig slurry?

hugo29

blue5000 wrote: »

Agree with this, but applying P now should help keep grass growing into the autumn for longer. Hugo can you get any pig slurry?

blue, yes i could but i could not apply now on the grazing paddocks, I could book some and get it out next spring or this back end

hugo29

bob charles wrote: »

Applying P now wont have much of a benefit if any as temps are high and whatever P in the ground is available. P shortages really only occur in grassland at the being of the year when temps are down or during cold periods. What is your average P figure. Depending on when you spread the lime you should be starting to see a response, say if you spread in spring

thanks bob, so on that basis when soil samples were done in spring 2012, (think was feb), i would not have got an accurate reading on P values, is that correct
Lime was spread march this year, should i sample a field soon to get accurate P value now
Average Value across the grazing paddocks is 2.2-2.5 for P and is Index (V Low 1)

mf240

tim04750 wrote: »

16% superphospate 0,16,0, you'll get a good response on index one's and low two's
or classic NP which is which is 25,4,0, more of a top up type fertilizer.

how much a ton is the 16 % phos just roughly list price will do.

bob charles

hugo29 wrote: »

blue, yes i could but i could not apply now on the grazing paddocks, I could book some and get it out next spring or this back end

why not, cattle can graze nearly behind the tank when its pig slurry, presume the salt content helps this:D, couple thousand gls per acre on a drizzly day and you wouldnt even know you spread it.

bob charles

hugo29 wrote: »

thanks bob, so on that basis when soil samples were done in spring 2012, (think was feb), i would not have got an accurate reading on P values, is that correct
Lime was spread march this year, should i sample a field soon to get accurate P value now
Average Value across the grazing paddocks is 2.2-2.5 for P and is Index (V Low 1)

So was your starting Ph something around 5.8?? if so I have always seen on my own ground when you take up Ph more P becomes available and will even show up in soil tests. On saying that I dont take too much notice of soil tests, as good fields will always test low and bad fields can test high due to them producing poor crops. My best crops have being grown on ground with nearly zero levels of P and K

I would wait on sampling again until feburary or march next year, make sure the ground is nice and dry before testing otherwise you will get inaccurate results. I would consider P of 2.5 to be anything to be worried about and if you apply artifical P now I doubt you would get a response to cover the cost this year. Dont be using TSP if possible as this takes forever to work

hugo29

bob charles wrote: »

So was your starting Ph something around 5.8?? if so I have always seen on my own ground when you take up Ph more P becomes available and will even show up in soil tests. On saying that I dont take too much notice of soil tests, as good fields will always test low and bad fields can test high due to them producing poor crops. My best crops have being grown on ground with nearly zero levels of P and K

I would wait on sampling again until feburary or march next year, make sure the ground is nice and dry before testing otherwise you will get inaccurate results. I would consider P of 2.5 to be anything to be worried about and if you apply artifical P now I doubt you would get a response to cover the cost this year. Dont be using TSP if possible as this takes forever to work

your a font of knowledge,

my PH was 5.0 and 5.2 on the two separate blocks (before this years lime application) I would consider P of 2.5 to be anything to be worried about, sorry do you mean 2.5 P would worry you

hugo29

bob charles wrote: »

why not, cattle can graze nearly behind the tank when its pig slurry, presume the salt content helps this:D, couple thousand gls per acre on a drizzly day and you wouldnt even know you spread it.

never knew that was possible

bob charles

hugo29 wrote: »

your a font of knowledge,

my PH was 5.0 and 5.2 on the two separate blocks (before this years lime application) I would consider P of 2.5 to be anything to be worried about, sorry do you mean 2.5 P would worry you

sorry meant to say woudlnt worry about P at 2.5 . Putting lime on land at Ph 5 would get you a massive response. regarding the pig slurry I was told 4 days, but I wouldnt go that fast myself, spread grazed off grass where animals wouldnt be going for 10day and report back to us

hugo29

bob charles wrote: »

sorry meant to say woudlnt worry about P at 2.5 . Putting lime on land at Ph 5 would get you a massive response. regarding the pig slurry I was told 4 days, but I wouldnt go that fast myself, spread grazed off grass where animals wouldnt be going for 10day and report back to us

so i am the Guinea "PIG":D:D

Username John

mf240 wrote: »

how much a ton is the 16 % phos just roughly list price will do.

I ordered some last week, and I was told the price at the time - I think it was around €450 / ton, but I cant remember exactly now