Mortone

Cereals: Use Mortone at the rate of 3-4 pints/acre. (4.25-5.5 litres/hectare) in 20-40 gallons water/acre (225-450 litres/hectare). Spraying should be carried out during good growing weather when the cereals have reached the 5 leaf stage, growth stage 1.5Z.C.K. but before jointing G.S. 3.1Z.C.K. Oats can be sprayed from the 3 leaf stage G.S.1.3Z.C.K. – but before jointing G.S.3. 1C.Z.C.K.
Grassland: On grassland established more than two years use 4 pints/acre (5.5litre/hectare) in 20-40 gallons water/acre (225/450 litres/hectare), but to control the soft rush use 5 pints Mortone per acre (7 litre/hectare) in a minimum of 40 gallons water /acre (450 litre/hectare). If weeds such as Stinging Nettle or Docks are problems in the grassland use either Nettlex or Kildock.

Uhm for rushes 1.55 litres for every 100 litres of water in sprayer, (I think!). Or 155ml for every 10 litres.

AFAIK you need to follow the instructions quite tight on these selective weedkillers...

Not concentrated enough and it won't kill the target weed, too concentrated and it will be less selective and severely check the grass..

Just mixing it the same as roundup sounds crazy... Take time with the label and mix the right amount... If nothing else these products are too expensive to be wasting.