The Headage Payments Scheme (Northern Ireland) 1957
for each 1 per centum by weight of nitrogen (N) and proportionately for any fraction thereof 2 0
for each 1 per centum by weight of water-soluble phosphoric acid (P2O5) and proportionately for any fraction thereof 3 6
for each 1 per centum by weight of insoluble phosphoric acid (P2O5) and proportionately for any fraction thereof 2 0
for each 1 per centum by weight of potash (K2O) and proportionately for any fraction thereof 1 10

EXPLANATORY NOTE
(This Note is not part of the scheme, but is i...