The Prescott daily news., 1916-04-20
COTTONSEED MEAL.

Al the present time, when potash :. tho form of salts is practically un- "htoinable and when both nitrogen and acid phosphate have advanced in
 ;oo because of the use of nitrates r.d sulphuric acid for munition pur- aosoc cottonseed meal, which carries III three of the fertilizing elements, hocomes of great importance. In re- .ort years immense quantities of this uoterial have gone into fertilizers, opproximately 1,0O0,0O0 tons having been so used in 1913.
 Cottonseed meal, the residue after the oil has been extracted from cot tonseed, is a dry, yellowish powder, having excellent mechanical proper tes for fertilizer mixtures, and con- tains about 6.5 per cent of nitrogen, per cent of phosphate acid, and ? ner cent of potash. It is, therefore, according to specialists of the depart ment, primarily a nitrogenous fer tilizer. but under present conditions it's potash content is highly import ant and is a decided factor in deter mining the price at which the mater ial is sold.
 In practice, cottonseed meal should be mixed with other ingredients, Most of the formulas heretofore published have advocated various proportions of acid phosphate and muriate of pot ash in combination with cottonseed meal Muriate of potash is to all in tents and purposes unobtainable this year and must be omitted from pres ent consideration. If 1000 pounds of cottonseed meal and 1000 pounds of acid phosphate are mixed, however, ton of material results which con- tains about 1S0 pounds of phosphoric acid, 65 pounds of nitrogen, and 20 pounds of potash. This is about 9 per cent phosphoric acid, 3.25 per cent nitrogen, and 1 per cent potash, and makes a very satisfactory mix ture for many soils where field crops are to be grown. For trucking and gardening, present practice demands higher content of potash, and the mixture may be supplemented by the application of unbleached wood ashes if obtainable.
 Nitrogen in cottonseed meal is not so quickly available as when applied in the form of nitrate, but on the other hand, is not so likely to be eached out in times of heavy rain tall. In light sandy soils where teaching is rapid the use of organic material such as cottonseed meal is to be preferred in supplying the ne- ceSsary nitrogen. Decay of the or ganic material liberates the nitrogen gradually and there is much less canger of loss than is the case when soluble salts, like Chilean nitrate, are used
 Most of the mineral ingredients in cOttonseed meal are recovered in the manure If the material is used as a cattle feed. The most economical use VI cottonseed meal is, therefore, to ieed It and apply the manure to the Nno' In this way the material is Haue to serve double purpose. Euro peah dalrymen have for some years DOught large quantities of American VO''onseed meal for feeding purposes. .'S the livestock industry develops :" our Southern States, doubtless an "v.eaSng amount of this material "'1 De diverted from the fertilizer "@ae for use as stock feed, and at p present wherever possible the prac- a'e q feeding the meal and using the I0Hufe for fertilizer should be fol- y"ed' rahter than the direct appli- land. '''e'' 'o ''ie