GLAS fertiliser calculation help

josephsoap

I'm just trying to get my head around as to how much fertiliser I can apply to pasture in the low input permanent pasture parcel

The maximum amount of chemical Nitrogen that can be applied is 40kg / Ha

I always applied fertiliser in 'bags an acre'

If my understanding is correct, if I have 2 bags of 18-6-12 (100 kg of fert.) 18kg of the 100kg is Nitrogen?


Therefore 40 / 18 = 2.2 bags/acre is the max amount of 18-6-12 that can be applied in a year for low input permanent pasture?

croot

josephsoap wrote: »

I'm just trying to get my head around as to how much fertiliser I can apply to pasture in the low input permanent pasture parcel

The maximum amount of chemical Nitrogen that can be applied is 40kg / Ha

I always applied fertiliser in 'bags an acre'

If my understanding is correct, if I have 2 bags of 18-6-12 (100 kg of fert.) 18kg of the 100kg is Nitrogen?


Therefore 40 / 18 = 2.2 bags/acre is the max amount of 18-6-12 that can be applied in a year for low input permanent pasture?

No I think it's 18kg per bag. So two bags is 36kg just short of the amount per ha.

josephsoap

croot wrote: »

No I think it's 18kg per bag. So two bags is 36kg just short of the amount per ha.

Cheers croot, 2 bags per acre is still not bad.

Also does anyone know if slurry can be applied to LIP pasture?

I said

josephsoap wrote: »

Cheers croot, 2 bags per acre is still not bad.

Also does anyone know if slurry can be applied to LIP pasture?

Yeah as much as you like as long as it's not by splash plate afaik

White Clover

josephsoap wrote: »

I'm just trying to get my head around as to how much fertiliser I can apply to pasture in the low input permanent pasture parcel

The maximum amount of chemical Nitrogen that can be applied is 40kg / Ha

I always applied fertiliser in 'bags an acre'

If my understanding is correct, if I have 2 bags of 18-6-12 (100 kg of fert.) 18kg of the 100kg is Nitrogen?


Therefore 40 / 18 = 2.2 bags/acre is the max amount of 18-6-12 that can be applied in a year for low input permanent pasture?

To convert kg/ha to units/acre, you multiply by O.8.
In a bag of 18 6 12 you have 18 units of N, 6P and 12K.
You can do the maths yourself.

rangler1

josephsoap wrote: »

Cheers croot, 2 bags per acre is still not bad.

Also does anyone know if slurry can be applied to LIP pasture?

I think you're right in your first post, 18/6/12 is 18% nitrogen, ie 18kgs N in 100kgs 18/6/12

White Clover

croot wrote: »

No I think it's 18kg per bag. So two bags is 36kg just short of the amount per ha.

Incorrect. 18 6 and 12 are percentages. In a 50kg bag you have 9kg N 3kg P and 6kg K.

TPF2012

40 kg/ha equals 32.4 units/ac. So you could only put out 1.8 bags to the acre of 18 6 12.

tanko

I said wrote: »

Yeah as much as you like as long as it's not by splash plate afaik

Was it like that in AEOS also? That's a ridiculous restriction if true.

Base price

OP have you got soil samples done yet. If not better to get them done before applying fert.
We have low input permanent pasture as part of our Glas application and our advisor has to do soil samples before we spread slurry/fert. He wanted to do them two weeks ago be we had to put him off as we were not about on the day.

MayoAreMagic

Worth mentioning that you seem to be interchanging hectares and acres there in your calculations. 40kg a hectare, not an acre...

Roughly 2.5 acres in a hectare, so that is 16kg an acre.

9kg in a bag of 18-6-12, so that is around 1 and three quarters of a bag per acre, or just over three bags of 10-10-20 per acre

pheasant tail

I said wrote: »

Yeah as much as you like as long as it's not by splash plate afaik

There are no restrictions on how you want to spread your slurry or lime. As mentioned just make sure you get your soil testing fine first

J.O. Farmer

pheasant tail wrote: »

There are no restrictions on how you want to spread your slurry or lime. As mentioned just make sure you get your soil testing fine first

I think using the trailing shoe type methods is a separate measure.

Farrell

Base price wrote: »

OP have you got soil samples done yet. If not better to get them done before applying fert.
We have low input permanent pasture as part of our Glas application and our advisor has to do soil samples before we spread slurry/fert. He wanted to do them two weeks ago be we had to put him off as we were not about on the day.

The Nutrient plan had to be in for the end of the year & planners have to take the soil samples & now before is ideal before application, but if we're to wait on the samples will some of us be spreading in May?