Abstract: A process for the ammoniation of straw and other plant materials containing lignocellulose with a dry matter content of at least 60%, utilizing anhydrous ammonia, preferably in liquid form. The plant material is covered by a gas impervious material and ammonia is added in excess of the amount needed for optimal irreversible nitrogen binding, preferably from 20-35 kg NH.sub.3 /ton dry matter, without application of external heat and pressure. The ammonia impregnated material is left at ambient temperature for at least 10 days, whereafter it is vented and ready for use. The preferred use of the ammoniated straw is as an animal feed.

Abstract: The invention relates to a process for the production of phosphoric acid containing calcium phosphates, i.e. Ca-containing phosphoric acid, by evaporating Ca-containing mother liquor from Odda process, whereby practically all the remaining nitrate and fluorine are removed in the form of HNO.sub.3, HF and SiF.sub.4, in which process the Ca-containing mother liquor is given a Ca/P weight ratio which is lower than 0.45 and is evaporated while recycling Ca-containing phosphoric acid, the recirculation being so controlled that the liquor has a phosphorus concentration during evaporation which is always adequate to prevent the liquor from forming a paste-like mass. Thus, it was discovered that the undesirable paste-like consistency experienced when calcium is present during evaporation can be avoided by controlling the phosphorus content.