182 AGRICULTURAL EXPERIMENT STATION. [Jan. 



3. Field Experiments regarding the Effect of 

 Different Combinations of Commercial Fertil- 

 izers ON THE Yield and the Character of 

 Several Prominent Garden Crops (1892). 



Field C. 



1891. — The observations upon Field C with different 

 com1)inations of commercial fertilizers on the yield and 

 character of some prominent garden crops began during the 

 spring of 1891. The portion of Field C devoted to this 

 experiment during 1891 consisted of one-half of its entire 

 area, running from east to west along its south side (328 

 feet long and 88 feet wdde). It was subdivided into five 

 plats of corresponding size and shape (88 by Q>'2 feet), one- 

 eighth of an acre. These plats were separated from each 

 other and from other cultivated land adjoining by a space of 

 five feet of unmanured and unseeded land. The soil is sev- 

 eral feet deep, and consists of a rather light loam in a good 

 state of cultivation ; 600 pounds of fine-ground bone and 

 200 pounds of muriate of potash per acre were used for 

 several years previous to 1891 as the annual manure supply. 

 The field slopes gently from west to east. The plats were 

 numbered 1, 2, 3, 4, 5, beginning at the east end of the 

 field. Each plat received during the spring of 1891 a 

 manurial mixture of its own as fertilizer. 



The difference of the fertilizers applied consisted essen- 

 tially in the circumstance that nitrogen and potash were used 

 in several of them in difierent forms. All plats received 

 practically the same quantity of nitrogen, potash and phos- 

 phoric acid, and every one of them received its phosphoric 

 acid addition in the same form, namely, dissolved bone- 

 black. Some plats received their nitrogen supply in the 

 form of orsranic animal matter, dried blood ; others received 

 their nitrogen in the form of sodium nitrate, Chili salt- 

 petre ; others in the form of ammonium sulphate. Some 

 plats received their i)()tash in the form of muriate of potash 

 and others in the form of the highest grade of potassium 

 sulphate (in our market 95 per cent.). The subsequent 

 tabular statement shows the quantities of the manurial sub- 

 stances applied to different plats : — 



