1897.] 



PUBLIC DOCUMENT — No. 33. 



191 



rate of 390 pounds per acre. (For the analysis of phos- 

 phates and cost of each in 1<S90 see report for 1895.) 



The following fertilizer mixtures have been applied annu- 

 ally, from 1890 to 1894, to all plats, with the exception of 

 Plat 3, which received in 1890 ground apatite and in 1891 

 no phosphate whatever, on account of the failure of securing 

 in time apatite suitable for the trial. 



Annual Supply of Manurial Substances. Pounds 



. ^{ 



Plat 1 (south, G,iOi square feet), 

 Plat 2 (6,565 square feet) 

 Plat 3 (6,636 square feet). 

 Plat 4 (6,707 square feet), 

 Plats (6,778 square feet). 



Ground phosphatic slag, 

 Nitrate of soda, 

 Potash-magnesia suljDhate, 

 Ground Mona guano, . 

 Nitrate of soda, 

 Potash-magnesia sulphate, 

 Ground Florida phosphate, 

 Nitrate of soda, . 

 Potash-magnesia sulphate. 

 South Carolina phosphate. 

 Nitrate of soda. 

 Potash-magnesia sulphate. 

 Dissolved bone-blaclc, . 

 Nitrate of soda, 

 Potash-magnesia sulphate. 



127 



43 



58 

 128 



43i 



59 

 129 



44 



59 

 131 



44i 



60 



78 



45 



61 



J^anies of Orojjs raised from 1890 to 1894. 

 1890, potatoes (see eighth annual report of Massachusetts 

 State station) ; 1891, winter wheat (see ninth annual report 

 of jNIassachusetts State station) ; 1892, serradella (see tenth 

 annual report of Massachusetts State station) ; 1893, Dent 

 corn, Pride of the North (see eleventh annual report of 

 Massachusetts State station). 



Summary of Yield of Cro2)S (Pounds). 



PLATS. 



Platl, phosph.itic slag, 

 Plat 2, Mona guano, 

 Plat 3, Florida phoephato, . 

 Plat 4, South Carolina floats, 

 Plat 5, dissolved bone-black, 



1890. 



Potatoes. 



1,600 

 1,415 

 1,500 

 1,830 

 2,120 



I89I. 



Wheat. 



380 

 340 

 215 

 380 



405 



1892. 



Serradella. 



1893. 



Corn. 



4,070 

 3,410 

 2,750 

 3,110 

 2,920 



1,660 

 1,381 

 1,347 

 1,469 

 1,322 



Having for four years (1890-94) in succession pursued 

 the above-stated system of manuring each plat with a differ- 



