Table C shows the percentage composition of the crops that wer 

 grown on the plots, and Table D that of the crops which were grown in 

 the pots. 



Letters were addressed to' the stations, asking that a history of th 

 soils be furnished. At this time six have not replied. The data 01 

 these will be furnished later. The questions asked were as follows : 



What is the native vegetation of the soil in this locality ? 

 What was the vegetation on the plot when prepared for the experiment ? 

 Was the soil virgin ? 

 If cultivated, give crop, yield, and fertilizer used for the years 1901, 1900, 1899 

 1898, 1897. 



Was the season favorable for the experimental crops grown this year ? 

 Were the crops on these plots injured by insect or plant diseases ? 

 Is the soil alkali ? Was it irrigated ? 

 Give geological origin as far as possible. 



DESCRIPTIONS OF SOILS. 



North Dakota, Soil No. 1. Native vegetation consists of prairie grass, 

 weeds, and rosebushes. This land has been under cultivation twent}*- 

 two years, every year in wheat, with possibly one or two exceptions 

 when other grains were grown. 



The early season was wet, making the planting time three weeks late. 

 Crops not injured by insects or disease. Soil is somewhat alkali. Was 

 not irrigated, and the season was quite unfavorable for an average crop. 

 The soil was formerly a part of the bed of Lake Agassiz. 



Minnesota, Soil No. 5. Native vegetation is scrub oak. Plot vege- 

 tation was timothy, in 1901 yielding 1.84 tons. Ten tons of farm ma- 

 nure were added per acre. In 1900, timothy yielding .65 ton; in 1899, 

 timothy yielding 1.25 tons ; in 1898, wheat and flax as nurse crop seeded 

 with timothy, the nurse crop being cut for hay. In 1897 the crop was 

 corn, cut for fodder, yielding about 14 tons of green fodder. 



Season favorable. Insects injured wheat. Is not alkali; not irri- 

 gated. Geological formation is glacial drift. 



Wisconsin, Soil No. 7. Native vegetation is oak, maple, and elm. 

 Crop for 1901 was clover, yielding 2.8 tons per acre. In 1900, oats 

 and clover. Oats cut for hay, yielding 2.6 tons. Clover cut, yielding 

 .9 ton. In 1899, clover for silage, 17 tons per acre. Dressing of barn- 

 yard manure added. In 1898 and 1897, hay. Crop was not weighed. 



Season was very unfavorable. No insect or disease injury to crops. 

 Not alkali ; not irrigated. Geological formation, glacial drift. 



Michigan, Soil No. 9. Native vegetation, beech, maple, and ash. 

 No vegetation on plot previous to experiment. No cropping in the last- 

 five years. 



Season was too wet. Crops injured by rust. Soil not alkali ; not 

 irrigated. Geological formation is drift, glacial, or possibly alluvial. 



Vermont, Soil No. 11. The native vegetation is a grass similar to 



