338 



EXPERIMENT STATION RECORD. 



South 'Carolina phosphate (floats) were each applied annually at the 

 rate of 850 lbs. per acre and dissolved boneblack was applied at the rate 

 of 500 lbs., in connection with 250 lbs. of nitrate of soda and 390 lbs. of 

 potash-magnesia sulphate. No applications of the phosphates have 

 been made since 1893, but the applications of potash and nitrogen have 

 been continued. 



"• A summary of results for the whole period covered by the experi- 

 ments is given in the following table : 



Yields on plats fertilized with different phosphates, 1S90 to 1896. 



Plats. 



Plat 1, phosphatic slag 



Plat 2. Mona guano 



Plat 3, Florida phosphate 



Plat 4, South Carolina phosphate 



(floats) 



Plat 5, dissolved boneblack 



1890. 

 Potatoes. 



1,600 

 1,415 

 1,500 



1,830 

 2,120 



1891 

 Wheat. 



Pounds. 

 380 

 340 

 215 



380 

 405 



1892. 



Ser- 



radella. 



1893. 1894. 



Corn. Barley. 



Pounds. 

 4,070 

 3,410 

 2,750 



3,110 

 2,920 



Pounds. 

 1,660 

 1,381 



1,347 



1,469 

 1,322 



Pounds. 

 490 

 405 

 290 



460 

 390 



1895. 

 Eye. 



1896. 

 Soy 

 bean. 



Pounds. 

 695 

 630 



383 



759 

 625 



Pounds. 

 254 

 233 

 262 



252 



247 



"The plat receiving dissolved boneblack leads in yield during the first two years, 

 while the third, fourth, fifth, and sixth years the plats receiving phosphates insoluble 

 in water are ahead, phosphatic slag being first, with South Carolina floats second." 



Effect of chlorid of potassium on sulphate of ammonium in 

 mixed fertilizers, C. A. Goessmann (Massachusetts Hatch Sta. Bpt. 

 1896, pp. 222, 223). — In the course of experiments at the station it was 

 observed that fertilizer mixtures containing muriate of potash and 

 ammonium sulphate invariably gave lower yields than those containing 

 sulphate of potash and ammonium sulphate. 



'•As the season, character of the soil and mode of cultivation were practically the 

 same in all cases it seemed but natural to conclude that the [first] fertilizers suffered 

 an unfavorable change when incorporated in the soil. An actual trial proved that 

 a dry mixture of muriate of potash and sulphate of ammonium dissolved in water 

 changes into sulphate of potash and chlorid of ammonium (sal ammoniac). This 

 form of nitrogen is known to act unfavorably on growing plants." 



Deep stalls and the conservation of manure, C. BOY8EN (Landw. Wochcnbl. 

 Schlcswig-Holstcin, 47 {1897), No. 34, pp. 486-488). — The article discusses in a popular 

 style the advantages and disadvantages of the deep-stall system of managing 

 manure. 



Green manuring (Jour. lid. Ayr. [London'], 4, No. 1, pp. 1-10, fig. 1). — A critical 

 review of that portion of the seventh series of Grandeau's Eludes A gronomiques deal- 

 ing with the fixation of nitrogen by leguminous plants. 



Lime and slag, L. Grandkau (Jour. Agr. Prat., 61 (1897), II, No. 33, pp. 278,274). 



Analyses of commercial fertilizers, M. A. Scovell, A. M. Petek, and H. E. 

 Curtis (Kentucky Sta. Bui. 68, pp. 63-75). — This includes brief explanations of the 

 terms used in stating fertilizer analyses, notes on valuation of fertilizers, and tabu- 

 lated analyses and valuations of 98 samples of fertilizers. 



Fertilizer analyses, If. 15. Battle (Nortlt Carolina sin. Special Bute. 46. pp. 175-178; 

 47, pp. 183-190). — Tabulated analyses and valuations of 103 samples of fertilizers 

 examined during May and part of June, 1897. 



Fertilizer analyses, H. B. Battle (North Carolina Sta. Bpt. 1896, pp. 5-31). — A 

 reprint of Bulletin 124 of the station (E. S. K., 8 p. 300).- 





