Manure calculations

[davidroberts30]

Think im right but stand to be corrected .
Going into fodder beet

 

[robbie]

Is that kgs ha or units acre???
You need to make sure you use the % available figures for each nutrient.
90% for k
60% for p
10 or 15% for N
Don't worry too much about the S

 

[davidroberts30]

Sorry it's in units acre

 

[robbie]

Still need to use % available.

 

[davidroberts30]

Still need to use % available.

Thought I did

 

[Al R]

You need to add another few bags of K

 

[robbie]

You need to add another few bags of K

Or some salt, or both

 

[Al R]

Or some salt, or both

Both ideally yes.

 

[davidroberts30]

Now I'm really confused

 

[robbie]

What fym and slurry is it????

 

[jg123]

Are you ploughing it all down? Have to forget about that until you plough it back up next year I always put fym K and salt, N
depending on how much muck and top dress some N

sugar beet but shouldn't be far away

 

[davidroberts30]

What fym and slurry is it????

10t fresh fym and 10t old fym ploughed in 2 days later and 4k beef slurry with a fair bit of straw in on top of furrows

 

[Derrick Hughes]

Slurry could be 80 % washings
Impossible to calculate without a test
Sorry you seem to know yours but as a general rule
But if you have a lot of straw in it won't it use a lot up breaking the straw down

 

[robbie]

So, lots of assumptions but spring applied, standard values and all indices at 1.

Beet crop needs 80kg/ha p, 130kg/ha K, 200kg/ha na2o and 120kg/ha N

Your slurry and muck will supply 85.5kg/ha N,122kg/ha P, 523kg/ha K.

So you only really need to apply the balance of N from the bag and maybe some salt as beet love salt but you have got bags of K.

To convert kg/ha to units/acre X 0.8

 

[davidroberts30]

Slurry could be 80 % washings
Impossible to calculate without a test
Sorry you seem to know yours but as a general rule
But if you have a lot of straw in it won't it use a lot up breaking the straw down

Ask @mtx.jag how thick the slurry was....
I've used the rb209 6%dry matter figure but think it could be closer to 10%

 

[davidroberts30]

So, lots of assumptions but spring applied, standard values and all indices at 1.

Beet crop needs 80kg/ha p, 130kg/ha K, 200kg/ha na2o and 120kg/ha N

Your slurry and muck will supply 85.5kg/ha N,122kg/ha P, 523kg/ha K.

So you only really need to apply the balance of N from the bag and maybe some salt as beet love salt but you have got bags of K.

To convert kg/ha to units/acre X 0.8

Getting somewhere nowat least we in same ball park
What salt ?is that a fert spreader job or sprayer

 

[Derrick Hughes]

Does not salt replace some of the potash but cheaper

 

[davidroberts30]

Will the neighbours get upset if I fill from the tide down the road
500l a hectare

 

[deleted user 837354]

With that amount of potash being on hand I wouldn't bother with the salt in all honesty. Make up the shortfall of nitrogen though.

 

[deleted user 837354]

Does not salt replace some of the potash but cheaper

He's applying over 500kg/ha of K from his muck. No saving to be made in reality.