When variable rate spreading it is extremely important that the spreader you use is able to apply different rates of fertiliser on the move and without requiring any physical adjustment if the machine.
All KRM Machines use the same patented outlet design. It can be seen from the photo opposite that the outlet comprises 2 stainless steel shutters which open away from each other. Using this double shutter ensures the drop on point remains unaffected by the size of the outlet. However following extensive testing it has been found that in order to have no effect upon the spread pattern it is necessary to advance the drop on point slightly as the application rate is increased. Therefore on the KRM machine one outlet opens slightly faster than the other so this advance occurs automatically.
The graph below shows actual tray test results for one of our machine spreading the same material at different rates from 40 to 400 Kg/ha. It can be seen that the same desirable triangular shaped spread pattern is achieved at all rates. No physical alterations have been made to the machine, only the application rate has been changed.
The chart below shows the coefficient of variation for all of the above spread patterns. It can be seen that in all cases a coefficient of variation below 10% was recorded which represents an extremely level spread pattern.
This clearly demonstrates that you can change the application rate on the move with a KRM spreader and because of its unique outlet design the accuracy of the spread pattern is uncompromised.
KRM - Keith Rennie Machinery Ltd.
Keith Rennie Machinery Ltd, Registered office: Clay Pit Lane, Bar Lane Industrial Estate, Boroughbridge, North Yorkshire,YO51 9LS
Tel: 01423 324221
  
Registered in England No 2050946 Vat No GB 431025309, e-mail info@krm-ltd.co.uk
Fax: 01423 324355