180 AGRICULTURAL EXPERIMENT STATION. [Jan. 



2. Field Experiment with Prominent Varieties or 

 Grasses, to study Their Composition under fairly 

 Corresponding Conditions, as far as Soil and 

 Manure are concerned, and to compare Their 

 Economical Value avhen raised by Themselves 



AS WELL as in CaSE OF MIXTURES (1891). 



Field B, 



This field occupies an area of one and seven-tenths acres, 

 and runs from north to south, nearly on a level. The soil 

 consists of a somewhat sandy loam of several feet in depth. 

 The systematic treatment of the area was inaugurated in 

 1884, when the present subdivision into eleven plats was 

 first introduced. The plats are 175 feet long and 33 feet 

 wide (5,775 square feet, or two-fifteenths of an acre), of a 

 uniform shape, running from east to west, with a space of 

 five feet l)etween adjoining plats. The numbering begins at 

 the north end with 11, and closes at the south end with 21. 

 From 1884 to 1889 every alternate plat received annually 

 the same kind and the same amount of fertilizer, — 600 pounds 

 of fine-ground bone and 200 pounds of muriate of potash 

 per aere. Plats 11, 13, 15, 19 and 21 were annually ma- 

 nured as stated, and plats 12, 14, 16, 18 and 20 received no 

 manurial matter of any description during that period (1884 

 to 1889). The space of five feet left between the different 

 succeeding plats has been kept clean from any growth by a 

 constant use of the cultivator, and received at no time any 

 kind of manure. 



The details of the work carried on upon Field B have 

 been thus far reported from year to year in our annual 

 reports. The chemical analyses of the crops raised upon 

 this field, on account of the amount of work involved, have 

 been quite frequently published in later bulletins or in 

 annual reports of the succeeding year. 



A material change in the above-stated management of the 

 field was made in 1889, with reference to the previously un- 

 manured plats, 12, 14, 16, 18 and 20 ; they were subse- 



