P allowance query.

Seadin

Can I ask the farmers here how do I calculate how much Ps can be applied on my farm?

The reason I ask is I have a farmer that spread slurry on my land this year after first cut silage as he was taking 2nd cut silage too, I was selling the silage to him. He spread 18000 gallons on 9 acres. He is over his limit for the winter months with stocking rate and will have to sell some of the animals but would be fine if he could allow the 18000 gallons of his slurry to be recorded as going on my land. He is checking with me that my P content will be ok and that I won't be penalised?

I spread about 30000 gallons of slurry on 15 acres of my own land. This does not include the other farmers slurry of 18000 gallons.

I have 16 bullocks bought in February at 11 months and are now about 18-19 months old. I will finish them to the factory early next year.

I bought 4 tonne or urea at start of year. Spread 3 tonne of that and bought 2 Tonne of can and sulphur and that was all spread.

I am farming short of 75 acres of land.

Anyone have an idea if I be alright to allow the 18000 gallons of the farmers slurry onto my allowance? Will it all depend on the soil samples and what is allowed?

TIA

alps

https://www.boards.ie/discussion/2058369292/p-allowance-query

You need to take soil samples. Take them immediately as you'll need the results back so as to take in that 18,000 gallons of slurry.

You're technically off side as the slurry should not have come to you before the soil samples were taken and the exporter will have to notify the dept of the movement withing 4 days of the "new" movement.

Take deep soil samples, not the usual top inch of the soil. Your stocking rate and fertiliser usage should not inhibit the import of slurry if your soil samples allow.

alps

Alternatively, temporary lease the 9 acres to him from now until.the end of the year. This can be done by using a "form 5". He can farm that piece of ground to derogation limit for the 3/12 of the year that is left getting home an allowance for 200kgN which negates the need to move 18k gallons equating less than 190kg.

Temporary leasing doesn't affect your BISS applicationand you stocking rate is low anyway. Check though if it would effect any schemes you might be in.

V6400

https://www.boards.ie/discussion/comment/122623729#Comment_122623729

At that stocking rate is the P not taken to be index 3 in the absence of soil samples and therefore can import maintenance P?

Good loser

https://www.boards.ie/discussion/comment/122624863#Comment_122624863

Think that's correct.

Austinbrick

Screenshot_20240913_213653_WhatsApp.jpg

Apart from needing tonnes of lime, are there any suggestions or observations from ye.

tractorporn

Sorry for dragging up this old thread but has anyone a method for calculating your N and P allowance? I had access to the Teagasc system last year so know how to do it and have soil samples sticking rate etc but just not the programs/spreadsheet to do it on?

roosterman71

https://www.boards.ie/discussion/comment/123324234#Comment_123324234

Don't have anything I could share but been working on & off on an excel here to do some of this. I'm not getting a lot of time at it these days to do it but sometime I might have something to share. No use to ya now of course!

There's a Teagasc/ICBF calculator - https://www.teagasc.ie/media/website/environment/Nitrates_Banding_Calculator_v4.xlsx

You'd have a bit of messing here deleting tabs and things, plus it doesn't have the updated excretion rates for the different ages (easy update anyway). All this would give you the N side. Then it would need to be replicated a bit for the P.

I will say, it's criminal that there isn't an easily downloadable sheet for this sort of stuff. The cynic in me would say the advisor community would be pushing against such things thus meaning more work for them

tractorporn

Thanks @roosterman71 I managed to get a good handle on it using my soil samples, stocking rate and meal fed. And I eventually found the P allowances for each stocking rate band. Now I'm rough enough but at least I won't break it. I agree it shouldn't need to have to pay someone €300 for something that can be done yourself.

IMG-20250404-WA0000.jpg

DBK1

https://www.boards.ie/discussion/comment/123339500#Comment_123339500

Just so you know if you’ve either reseeded ground or sold hay or silage you are allowed an additional P allowance on them fields, I can’t remember the figures but there’s definitely an extra allowance.

For anyone that does sell forage I wouldn’t be too worried about being too accurate, once you’re close enough and not completely blaggarding the system I’d imagine you’d be safe enough.

tractorporn

https://www.boards.ie/discussion/comment/123339515#Comment_123339515

I think it's 15kgs/ha extra for reseeding, I did a few acres last year alright and haven't really factored it in just to leave a bit of breathing room. I'm not sure how to calculate the P for sale of silage without the computer program so I left it out.

roosterman71

https://www.boards.ie/discussion/comment/123339500#Comment_123339500

What I'm trying to do is have an excel sheet where you can input field IDs, area, index values, etc. Then steal that page from Teagasc I linked for the Nitrates calculations. That should then show the N levels allowed and when you spread a field with whatever, if you add it into an N column for the field it will show the N allowance remaining. I think the N part is easy enough to calculate.

P then is a different story cos of the indexes, meal fed, export of crop, etc. Haven't really got going on the P side as of yet.

I'm only doing it for the craic cos it wrecked my tits having to go off and try decode all this shite all the time. So I started trying to build something myself but I'll share it if/when I have something worth sharing and it can be updated as needed