55 



The roadways are 1 rod wide. Four of the .sul^tiekls are severally in 

 rotations, intended to demonstrate the effect of manuring and of period- 

 ically seedinu- to grass. For instance, subtields C and 11 are each year 

 planted to the same crops and the same character of manure applied 

 in equal ([uantities, the only difference being that at certain intervals 

 t<ul)tield H is allowed to lie in grass for a period of years, while subtield 

 C is cropped contimiously. The following is the rotation: 



1898. 

 1899 

 1900 

 1901 

 190'2 



1903 

 1901 

 1905 



Subfleld C. 



Corn (manured) 



Corn 



Oats 



Winter wheat 



Corn (manured in winter) 



Oats 



Winter wheat 



Corn (manured in winter) 



Subfleld H. 



Bromus iricnnis. 

 Bmmiis incnnis. 

 B null us iiirriiiis. 

 Brum IIS iiierinis. 

 Corn (top-dressing of manure before 



plowing up Bromus inermis). 

 Oats. 



Winter wheat. 

 Corn (manured in winter). 



Subtields D and I are in similar rotations, except that subffeld D does 

 not receive any manure and that the crops grown on these fields are not 

 the same as those on the other two subffelds during the same year. The 

 remainder of the subhelds are used for growing new and not generally 

 grown crops or for particularly good varieties or strains of varieties 

 of common crops. In another held are 10 acres divided into plats of 

 one-tifth acre, and each of these is planted to a particular perennial 

 forage plant or comliination of such plants. These are mostly grasses 

 and clovers. They serve as an object lesson in profitable seeding to 

 pastures and meadows in this region. Hurdles of special size are 

 pro^'ided for fencing these, so that any one of them may be pastured 

 when desired. In this manner the pasturage value is demonstrated. 

 There is also a held of about 10 acres divided into experiment plats 

 of one-tenth acre each. These, although primarily for experimenta- 

 tion, are also of value for purposes of instruction. 



For instruction in implements and machinery, there are walking, 

 riding, and disk plows; breaking plows; disk, spike, acme, and spring- 

 tooth harrows; subsurface packer; roller; .siibsoilers; press drills; 

 lister; corn planter; mowers; rake; hay loader; hay tedder; binder; 

 thrashing machine, etc. There are, for instruction in soils, samples 

 of soils from nearly a hundred different localities in the State. These 

 have been analyzed mechanically and the original soil and its constit- 

 uent parts arranged in small vials on a card showing the percentage of 

 the various sized particles. There is a collection of about 00 of the 

 native grasses in the State and some 200 specimens of grains (PI. XII, 

 tigs. 1 and 2). 



The college classes in soils use Snyder's Chemistry of Soils and 

 Fertilizers, but the course is given largely by means of lectures. In 

 field crops frequent use is made of Farmers' Bulletins and State agri- 

 cultural society reports, and of Morrow and Hunt's Soils and Crops of 



