do the maths.
3 bags of cut sward doesnt cover the offtake of first cut, 4 is even marginal. costs time and money to spread the fertiliser too.
how often is productive silage ground being reseeded? 5-7 years. divide the cost of that and lime and maybe a spray for weeds over the years and add it on
then what about the value of the asset? the land. it's worth X per annum to rent, but only grows appreciable amounts of grass for lets say .75 of the year, and that growth isnt in a flat line over the year, the best 2 months are april and may so a weighted rental value of around 25% of annual rent.
They're all the costs, add them all up and how much of a margin is there at €160 an acre?