710 



EXPERIMENT STATION RECORD. 



It was incidentally observed in these experiments that "tlie acidu- 

 lated South Carolina rock apparently depressed the yield of grain with 

 barley while hirgely increasing the amount of straw; with wheat both 

 grain and straw were largely increased and in about the same propor- 

 tion." The figures obtained were as follows: 



Effect of acid 2)]ios})ha1c on proporiiDn of (jrahi and airaw of wheal and havJey. 



Barley (.lir dry) : 

 Total crop. .. 

 ( iraiii 



Wheat (air dry): 



Total crop 



Grain 



Set I. 



(trams. 

 215 

 44 



84 

 26 



Set IT. 



Grains. 

 312 

 61 



162 

 50 



Set ni. 



Grams. 



538 

 17 



325 



105 



A partial chemical analysis (i'crtilizing constitnent>) is given of the 

 total crop produced in each set of boxes. 



Results of five years' experiments with fertilizers, W. C. 

 Stubbs {Louisiana Stas. Bui 3], M .ser., 2)P- 1092-1133).— Afiev an 

 introduction discussing the forms of fertilizers used with a brief review 

 of the latest investigations relating to the nature, care, and use of barn- 

 yard manure, and remarks on the value of leguminous plants in rota- 

 tion, deductions drawn from five years' experiments with fertilizers for 

 staple crops on three typical soils of the State are rejiorted. The fer- 

 tilizers which at (me time or another have entered into these exi^eri- 

 ments are: NHrof/oions fertilizers — Stable and farm manures, comi)osts 

 with and without cotton seed and with and without acid ])hosi)hate, 

 cotton seed (raw, crushed, and rolled), cotton seed meal, nitrate of soda, 

 sulphate of ammonia, dried blood, fish scrap, and tankage; Phosphatic 

 fertilisers — Dissolved boneblack, acid phosphate, precipitated dissolved 

 bone, precipitated acid phosphate, bone meal, bone ash, floats, andiron 

 slag; Potassic fertilisers — Kainit, muriate of potash, sulphate of potash, 

 nitrate of potash, carbonate of potash, and cotton-hull ashes. 



The chemical composition of the soils experimented on was as 



follows : 



Composition of Louisiana soils. 



