P & K usage per litre

maxxuumman

Anyone have the figures for how many units of P and K are used per litre milk per acre.
Just got soil sample results back and I'm 3&4's for K but have a few 2's for P. Have a bit of work to do on the P's . Thinking of going out with some 0-16-0 to push up the P. Just want to know what I need to put out to maintain levels, once I get it to the correct levels.

frazzledhome

6000 litre cow, 4 bags of 18/6/12

Brown Podzol

5,500 lt cow, 6kg p maintenance. 3.75 ton of 0-16-0 per 100 cows if my maths are correct.

knockmulliner

Would a big application of Phosphate not lead to grass tetanus when applied to grazing ground at this time of year

mf240

How much would you be importing in a ton of meal per head.?

Brown Podzol

knockmulliner wrote: »

Would a big application of Phosphate not lead to grass tetanus when applied to grazing ground at this time of year

A big application potassium would be the problem with tetany I think.

maxxuumman

Brown Podzol wrote: »

5,500 lt cow, 6kg p maintenance. 3.75 ton of 0-16-0 per 100 cows if my maths are correct.

frazzledhome wrote: »

6000 litre cow, 4 bags of 18/6/12

Frazzled at ~ a cow /acre is it 72/24/48 units which is 36kgsN/ 12 kgsP/ 24 kgsK. ????

But Brown podzol you say 6kgs of P.

Where am I making the mistake

Greengrass1

I'd say just spread as much p as you can Max. That's what we are doing here this yrs. Going to spread straight p and N.
Discussion group member spread his whole p allowance last spring and had serious grass all year and had the dry cows grazing till mid Dec which he never had before

frazzledhome

maxxuumman wrote: »

Frazzled at ~ a cow /acre is it 72/24/48 units which is 36kgsN/ 12 kgsP/ 24 kgsK. ????

But Brown podzol you say 6kgs of P.

Where am I making the mistake

Max, sorry I can't expand the figure is a figure quoted at a meeting I attended. We were told this is the amount needed to maintain your index. I am very open to correction on this. Brown could well be right.

frazzledhome

maxxuumman wrote: »

Frazzled at ~ a cow /acre is it 72/24/48 units which is 36kgsN/ 12 kgsP/ 24 kgsK. ????

But Brown podzol you say 6kgs of P.

Where am I making the mistake

Max, sorry I can't expand the figure is a figure quoted at a meeting I attended. We were told this is the amount needed to maintain your index. I am very open to correction on this. Brown could well be right.

case 956

told at discussion group last year cow removes one bag of 10-10-20 a year, I don't know after that

frazzledhome

frazzledhome wrote: »

6000 litre cow, 4 bags of 18/6/12

Sorry wrong info. I checked note it reads 5500 litre cow removes 3x0/10/20

But of course everyone on Boards have 8-10k cows

mf240

frazzledhome wrote: »

But of course everyone on Boards have 8-10k cows

Same as the local pup, everyone wants to talk about their best cow. :

Welcome back by the way.

frazzledhome

mf240 wrote: »

Same as the local pup, everyone wants to talk about their best cow. :

Welcome back by the way.

I think you may be confusing me with someone else

sheebadog

Surely a grazing cow will return most of what she takes from grazing platform
?

frazzledhome

sheebadog wrote: »

Surely a grazing cow will return most of what she takes from grazing platform
?

Milk is removed

sheebadog

frazzledhome wrote: »

Milk is removed

True.

freedominacup

frazzledhome wrote: »

I think you may be confusing me with someone else

You're right. He could be confusing you with someone else.

Brown Podzol

mf240 wrote: »

How much would you be importing in a ton of meal per head.?

I disregard the p in meal. It's variable and the first 300 kg's are disregarded in the new regs anyway.