Dismiss Notice
Direct Driller Magazine Issue 4 is now available to read online

click here to read...

Direct Driller

P and K

Discussion in 'Cropping' started by Dave6170, Jan 19, 2019.

  1. Macsky

    Macsky Member

    Location:
    Highland
    Your nitrogen fixing clover should do better if there is plenty P available, reducing your dependence on artificial N inputs.
     
    Bury the Trash, neilo and Dave6170 like this.
  2. Dave6170

    Dave6170 Member

    Location:
    Wick, caithness
    I always thought clover never did or lasted very well.
     
  3. neilo

    neilo Member

    Location:
    Montgomeryshire
    Agronomist reckons available P will help get the grass growing earlier in the Spring too.
     
    Dave6170 likes this.
  4. Plants will be more very dry spell / drought tolerant .
     
    Dave6170 likes this.
  5. Dave6170

    Dave6170 Member

    Location:
    Wick, caithness
    What do you use for P? @neilo
    Both local suppliers still saying 1.27.0 rock phosphate is better product than tsp
     
  6. Brisel

    Brisel Member

    Location:
    Dorset
    Hmm. Suppliers of rock phosphate, not TSP. No vested interest at all. :rolleyes:
     
  7. Dave6170

    Dave6170 Member

    Location:
    Wick, caithness
    They can get me tsp aswell no problem.
     
  8. Brisel

    Brisel Member

    Location:
    Dorset
    What is your soil pH?
     
  9. neilo

    neilo Member

    Location:
    Montgomeryshire
    I've gone to using Fibrophos, applied every few years. Otherwise, 1 cwt/ac of 0:24:24 as a maintenance dressing each year on grazing ground, double that plus some MOP for anything that has a cut taken off it.

    Agronomist is very keen on using a low rate of DAP early in the Spring on grassland, and reckons it really gets things going early on. I haven't tried it though, as it's very acidifying to the soil iirc (and expensive:unsure:). Used to use it in the Spring Barley seedbed before we managed to get indices up slightly, where it was fantastic stuff for promoting early rooting.
     
    Dave6170 and Brisel like this.
  10. Dave6170

    Dave6170 Member

    Location:
    Wick, caithness
    6.0 to 6.5.
     
  11. Dave6170

    Dave6170 Member

    Location:
    Wick, caithness
    I thought i would use fibrophos but muck seems to be doing the job for K. Just P thats very low
     
  12. clemmo

    clemmo Member

    Also p grow Kalphos etc if you need phosphate
     
  13. Brisel

    Brisel Member

    Location:
    Dorset
    That should be ok with Scotphos as long as it's cheaper than TSP, not forgetting spreading costs.
     
    Dave6170 likes this.
  14. Dave6170

    Dave6170 Member

    Location:
    Wick, caithness
    Scotphos Powder is around 200/t plus spreading. Granulated 50/t more

    Tsp is around 350/t price i ve been given so far.
     
  15. Brisel

    Brisel Member

    Location:
    Dorset
    Avoid the granulated - the lower surface area vs powder means it will be very slow release and unsuitable for correcting low indices. Maintenance only.

    Say it's £210/t spread. £210 for 270 kg P2O5 = 77.7 p/kg. TSP is £350 for 460 kg P2O5 = 76 p/kg not including spreading but I assume you've got a suitable fertiliser spreader so the cost of application is minimal.

    At that money the TSP looks a better bet IMO, but it needs to suit your logistics. If you go with Scotphos, consider a bigger dose as it will mean more is available sooner if you have the cash.
     
    Dave6170 likes this.
  16. neilo

    neilo Member

    Location:
    Montgomeryshire
    Assuming a relatively low dose per acre, it's going to cost a lot more than £10/t for spreading. Fibrophos 'delivered & spread' here is £146/t, but that includes 5ac (£25?) worth of spreading for each ton.
     
  17. Brisel

    Brisel Member

    Location:
    Dorset
    The dose is going to make a difference - the OP needs a big dose of at least 500 kg/ha to lift his indices so the cost per tonne should be less. My figures were only a rough guide & there are so many variables. IIRC the last time I had some VR Fibrophos spreading it was £10.40/ha regardless of dose rate though it was a biennial dose to make it more worthwhile, so some big doses in places.
     
    ollie989898 and neilo like this.
  18. 4course

    4course Member

    Location:
    north yorks
    compound pk 0 24 24 going on today 3x 15s following on while we can travel
     
    ollie989898 likes this.
  19. Dave6170

    Dave6170 Member

    Location:
    Wick, caithness
    The college have recommended 375kg/ha of tsp or 500kg/ha of scotphos for the low fields. Im confused, doesnt that give a different amounts of P? @Brisel @neilo

    Tsp is £353/t. Scotphos 0.29.5.0 is £208/t +£11/ha spreading.
    Its around 90ha i want to do. Can you guys tell which is the best value? Ive got myself in a right mess with my maths :confused:
     
  20. neilo

    neilo Member

    Location:
    Montgomeryshire
    Are they allowing for varying availability between the products?:scratchhead:

    I know little about either product.:oops:
     

Share This Page