106 



potash, but increasing the amount of potash from thirty to sixty pounds per acre 

 gave no increased yield. Original timber, oak. 



The soil marked "Campbell" is from Monroe County, and represents a cold, 

 badly drained clay, resembling the so-called "crawfish" clay. Commercial fertil- 

 izers are considered necessary for wheat. Field tests this year showed marked 

 gains on corn from the use of acid phosphate and potash, but increasing the 

 amount of potash from thirty to sixty pounds per acre gave no increased yield. 

 Original timber, poplar and mixed hard woods. 



The station land is a second-bottom soil, resting on gravel. It is a dark, pro- 

 ductive loam. In favorable seasons the land will produce fifty bushels of corn 

 and thirty bushels of wheat per acre without the use of fertilizers or manure. 

 While commercial fertilizers have some effect in increasing the crops, the use of 

 them on this land has not been profitable. Original timber: Black walnut, oak, 

 maple, wild cherry and some hickory. The plats from which the samples were 

 drawn have been in wheat since 1888. Plats 3 E. 1 and 3 E. 4 have received no 

 fertilizers; plat 3 E. 2 has received "complete" chemical fertilization, and plat 

 3 E. 5 has received applications of barnyard manure. In five years (1890 to 1894), 

 3 E. 1 lost to crop 8.1 pounds phosporic acid, 11.3 pounds potash, and 17.8 pounds 

 nitrogen; plat 3 E. 4 lost 7.2 pounds phosphoric acid, 10.1 pounds potash, and 

 15.9 pounds nitrogen; plat 3 E. 2 lost net 0.8 pounds phosphoric acid, 3.2 pounds 

 potash, and 7.9 pounds nitrogen; plat 3 E. 5 gained 4.2 pounds phosporic acid, 

 6.9 pounds potash, and 0.3 pounds nitrogen. The plats contain one-tenth acre 

 each. Plat 3 E. 4, a blank plat, contains humus (by Huston's method) ^5.3 per 

 cent., and nitrogen in this humus 4.52 per cent. Plat 3 E. 5, which has received 

 barnyard manure, contains humus 5.6 per cent., and nitrogen in this humus 5.71 

 per cent. 



The mechanical analyses of the Indiana soils are shown in Table I. 



TABLE I. 



