Cereals phosphate strategies

[dontknowanything]

OK, my head's ready to explode after thinking about this and talking to too many people.

Broadcast MAP in August
Foliar phosphate at 3 leaves
DAP in spring
Liquid APP in spring
Sewage sludge
TSP on cover crops
Place DAP with drill (don't have equipment for this anyway)

Don't know what to do!!!

 

[Andrew K]

I would have thought sewage sludge will give good bang per buck?

 

[dontknowanything]

Can't realistically put sludge n every field every year though

 

[Feldspar]

Would you need to apply it every year though?

In answer to the question if I was applying artificial P fertiliser I'd choose MAP applied with the drill.

 

[dontknowanything]

Can't do seed & fert at the moment.

Are you not putting on any P at all?

 

[tr250]

Think they say sewage sludge about every 3 years

 

[tw15]

Going to try dap treated with avail under osr at drilling ww will get eurofertill decoder under them at drilling outlying ww and osr fibrophos.

 

[Feldspar]

Can't do seed & fert at the moment.

Are you not putting on any P at all?

Current practice is to apply DAP in the spring which I don't think is good.

I'm going to separately try placed ammonium sulphate, elemental S and some placed MAP (if I can get it) at planting time and will then compare tissue P levels. We have (and you'll be similar I guess) about 6000 kg/ha total (all forms) of P205 so a fairly big bank to work with.

 

[Clive]

OK, my head's ready to explode after thinking about this and talking to too many people.

Broadcast MAP in August
Foliar phosphate at 3 leaves
DAP in spring
Liquid APP in spring
Sewage sludge
TSP on cover crops
Place DAP with drill (don't have equipment for this anyway)

Don't know what to do!!!

Don't forget fiberphos and chicken muck as well

DAP seems to be working well for me, I'm going to stick with that I think

 

[jack6480]

What's tsp?

 

[Feldspar]

Triple Super Phosphate

 

[Robigus]

OK, my head's ready to explode after thinking about this and talking to too many people....Don't know what to do!!!

I'm just the same.
I'm told on here that TSP is a waste of money, and I fear they may be right, because I've used tons of it for ages on clay ground with high Potassium, Mg and pH but very low Phosphate levels and it has not made a jot of difference.

I have DAP in the shed and I can now apply fert into the seed bed, but should I be putting that much nitrogen into a cereal seed bed? I can see that it is a plan for OSR, but what about beans?

 

[dontknowanything]

Current practice is to apply DAP in the spring which I don't think is good.

I'm going to separately try placed ammonium sulphate, elemental S and some placed MAP (if I can get it) at planting time and will then compare tissue P levels. We have (and you'll be similar I guess) about 6000 kg/ha total (all forms) of P205 so a fairly big bank to work with.

The tests I've had done show more like 4-500kg/ha, which one do you need to get the total P?

Don't forget fiberphos and chicken muck as well

DAP seems to be working well for me, I'm going to stick with that I think

DAP in the spring?

 

[dontknowanything]

Interesting that no one is doing foliar, as advocated by Neil Fuller/Steve Townsend.

 

[Clive]

Interesting that no one is doing foliar, as advocated by Neil Fuller/Steve Townsend.

I am on winter crops but DAP on spring crops

 

[Feldspar]

The tests I've had done show more like 4-500kg/ha, which one do you need to get the total P?

Actually ours are more like 4000 kg/ha after looking at the figures. 4-500 kg/ha is the available P205 rather than the total amount.

 

[JNG]

Going to try dap treated with avail under osr at drilling ww will get eurofertill decoder under them at drilling outlying ww and osr fibrophos.

Dont know much about avail, but is it necessary on DAP, I would use it on TSP alright to prevent P being locked up but on DAP where there is N with the P is it a necessary expense? Dont know the answer just asking the question?

 

[dontknowanything]

I am on winter crops but DAP on spring crops

what about spring legumes?

Actually ours are more like 4000 kg/ha after looking at the figures. 4-500 kg/ha is the available P205 rather than the total amount.

What test shows total P?

 

[JNG]

Generally good P levels here but im tempted to put just a touch of DAP maybe 50kg/ha of DAP (MAP if I could get it down with the seed) not much N there really. With spring legumes I have been using compost for a few seasons spread on frost in approx Jan and drilled into in Spring, done twice in 4 years and the best looking pea crops of the 4. Spring legumes not a huge need for P unless indexes very low IMO?

 

[Clive]

what about spring legumes?


What test shows total P?

mix them with SOSR so you can justify the N seems to be working !