Physio start vs Primary P vs dap? On osr

[sjl_0292]

Hi guys what are your experiences with osr granular starter fertilisers down the spout?

Has anyone done any trail plots for the following: Physio start /Primary P and dap? Will be interesting to see different results/rates etc

 

[Brisel]

No doubt there will be lots of snake oils that promise lots and cost lots, but in my opinion, you will need macro nutrients of nitrogen and phosphate.

Best - chicken litter
Better - digestate
Great - DAP
OK - straight ammonium N

Are you a member of an independent trials organisation like NIAB or Green Crop Information? Unfortunately, the AHDB website doesn't seem to have much on starter fertiliser for osr.