Grassland has been limed for centuries — even if you aim to
produce organically, its use is approved. If the grass in your fields
requires lime then it will not produce a worthwhile crop without
it.
What else you do to your fields is up to your judgement and
beliefs. If your aim is to produce every single blade of grass that
your land can possibly yield than you must use nitrogen. Some
fields can consume vast quantities of it. You must also add phosphorus
and potassium, bearing in mind that too much potassium
can limit magnesium uptake (if you graze sheep and cows this can
lead to an attack of staggers).
It is certainly worth having your soil
analysed and then working out very carefully what to add, unless,
of course, you start to feel that the whole exercise is creating too
much 'chemistry lesson' type of involvement. In that case, 'go
organic' although you must still fertilise the grass, that is keep on
with the lime and apply farm yard manure with a generous hand.
There is growing concern that the overuse of chemicals exhausts
the land. It certainly reduces the number of earthworms, those
wriggly friends that do an effective job of deep ploughing for you.
For these reasons, some farmers only use organically based
fertilisers on their land. Although the chemical content of the
fertiliser varies at times, great claims are made for its effectiveness.
Grassland