Show PHOSPHATE ROCK IS USED AS fertilizer if finely ground and well distributed gives good results this source of phosphorus being mere mora extensively used than for en an account of shortage of sulphuric Sulphur io add acid Pr epand br the united states depan depar meet of agriculture arid phosphate which ii 1 u used ted ex tend Tely as a fertilizer lias ling du dubbell blell in arc daring too last few year years barur ra of at this country are now facing a arious shortage of 0 this material becaj e the roi tlona ln in dantry la Is consuming sulphuric add 10 aich would ordinarily be used in thi th manufacture nanu fActure of add phosphate the situation has led of fert UM to sire give greater cOt consideration to its ue use of ground raw taw rock I 1 horhat ilat this source of phosphorus rua Is bein ing used as fertilizer more extensive 11 ly it I 1 aboin by the fact that during AT at least rix pit large companies coap aniM entered tho the raw ground phosphate bu bul afie bess slid the mcanal consumption of at ill tbs 11 tuat erial till has increased during the in lat it decarte decade ta tt over tong ona involving ai am expenditure to th tha fanner former of 0 at isalt ground raw Is far for lam vw soluble tha add 11 its u to be due large to tta its thorough distribution y in the eo so ehte to I 1 brought about bv br libell apall cantlon of very finely ground rock together with cwb ti th liste ae when lien a alt these condi condition tiou mv Us not fu fulfilled 1 A 11 ed it wj taki taka lie Teral year to obtain the distribution giving the maximum ran x icum ft 1 feet t th the benell cial effects of a corn I 1 amatively arat ively heavy application of finely ground rock phosphate extend over several years as a portion of the chate becomes soluble jile each year these increases in yields arc are creator greater ns as a rule in years care to be most etc eff tho llo ground phosphate rock ab i a bo applied to boll soil that Is veil yell slip plied i ith organic mat such soils bolls arc are 18 ficner in carbonic add than those of low or gante content and this acil Is imbor tant in effecting the solubility and availability of the phosphate rok licter lal ductility which Is more no Ic cable in bolls in organic mat ter Is also valuable la in aiding alding the of rock phosphate |