phosphoric

[ fos-fawr-ik, -for- ]

/ fɒsˈfɔr ɪk, -ˈfɒr- /

of or containing phosphorus, especially in the pentavalent state.

Origin of phosphoric

First recorded in 1775–85; phosphor- + -ic

Those rich in phosphoric acid and potash are usually most needed, but sometimes nitrogen also is necessary.

Clovers and How to Grow Them |Thomas Shaw
Pure bones are thus seen to contain about 29 per cent of phosphoric acid and 6-1/4 per cent of nitrogen.

Manures and the principles of manuring |Charles Morton Aikman
In it, for every 142 parts of phosphoric acid, there are only 56 parts of lime.

Manures and the principles of manuring |Charles Morton Aikman
Reference has been made to the fact that magnesium sulphate may probably not only fix the ammonia, but the phosphoric acid.

Manures and the principles of manuring |Charles Morton Aikman

Two of these plant foods, namely, phosphoric acid and potash, are minerals.

Agriculture for Beginners |Charles William Burkett

phosphoric

/ (fɒsˈfɒrɪk) /

of or containing phosphorus in the pentavalent state

phosphoric

[ fŏs-fôr′ĭk ]

Of, relating to, or containing phosphorus, especially with a valence of 5 or a valence higher than that of a comparable phosphorous compound.