Show PHOSPHATE ROCK I 1 IS USED AS fertilizer if finely ground and well distributed buted gives good results Resul tsi alli athla 11 source of phosphorus being more extensive extensively IY used than formerly on account of Sh shortage of sulphuric add acid prepared by the united states depart depari i ment ot of agricot agriculture I 1 ture arid phosphate pho phoc phate which Is used ex as a fertilizer I 1 lias as doubted fed in price durin tile lie last few years aars li gf at this country tire nr how hov it 11 serl lons oils shortage of this in dmitry la I 1 consuming much sulp sulphuric hurle field jv which jilch would ordinarily ordin arIll ahe alsed in UK of neld phosphate the rhe j on lina fills let users of ferell 1 iz irs rs to give greater consideration to on 01 iise of ground raw kock to abat tills this source of oc plim la 14 heilig iii used ri fertilizer more r v imire y h I 1 kan by the stet that df it ta i it least fajt birger entered t ground phosphate bus bu alness biess n vid i tle 1 iq consumption of tha al lips Inert ased during the last cil gado cude tn t over tons tona involving tin nn alc endl to td the farmer ot of ut at itasta round ground raw rock phosphate Is for far alcya soluble than nold its appears to be duo duc largely t tu to jt ites thorough orough distribution ja la the soil ahli ls 9 b about by b appet ensigns ot 61 very finely ground rock to j eab malage wen all th aliee re ot po i on dinu I 1 zi s 4 nol nok Pal tilled it int r ato obtain the W c C distribution giving the maximum of ef feet the beneficial effects of a comparatively ively heavy application of finely ground rock phosphate extend over several years as a portion of the pl chato becomes soluble each year these increases in yields tire lire greater as a rule in subsequent years to bei be most effective ground rock should be applied to soil that Is well supplied with organic matter such soils tire lire always richer in carbonic neld acid than those of low organic content and this acid Is important in effecting tho the solubility and availability of the phosphate rock bacterial activity which Is fiore n noticeable 0 ti in soils high in organic matter Is also valuable la fit aiding the solubility of 0 rock phosphate |