220 



THE CEREALS IN AMERICA 



tions made (291) ; but no rules can be laid down as a guide foi 

 general practice. The following table gives the results of trials on 

 widely different soils under widely differing climatic conditions : 



Station 



Depth of plowing, inches 



4 6 



10 12 



Illinois! .... 

 Illinois .... 

 Indiana (ave. 3 j'ears) . 

 Pennsylvania (ave. 3 years) 

 New Hampshire 2 . 

 Alabama (Canebrake Sta.) 

 Minnesota 



Ohio4 .... 

 Nebraska 



52.9 

 54.0 



69.4 



39-5 

 47.0 

 14.2 

 24.1 

 65.8 

 43-1 

 38.5 



69-3 

 57-5 

 40.5 

 62.0 

 26.2 



64.4 



71.7 



42-3 

 57-5 

 29.4 



59-58 



42.9 



31.0 



56.0 

 41.8 

 58.5 

 28.2 

 24.2 



42,0 



In all cases the plowing was done in the spring, except at the New Hampshire 

 Station, when the land was plowed November first. In the first trial at the Illinois 

 Station, in place of the usual intercultural tillage, the weeds were removed by 

 scraping with a sharp hoe with the least possible disturbaiKe of the soil An 

 adjacent plat, not plowed but disked one inch deep, yielded 56.4 bushels of grain. 

 The land on which this experiment was conducted had not been plowed in two 

 years. 



At the Pennsylvania Station a timothy and clover sod was plowed. At the four- 

 Inch depth the sod did not cover well and the shallow cultivation (two inches deep) 

 which all plats received did not eradicate the grass on plats plowed only four inches 

 deep. 



While in a number of trials satisfactory results have been 

 obtained by plowing four inches deep and less, yet the most 

 generally satisfactory depth, all things considered, would seem 

 to be six inches. As compared with wheat and oats, deep 

 plowing is advisable. 



^ All results are in bushels of grain per acre, except in the case of New Hamp- 

 shire, where tons of green fodder are given. 

 « Depths were 3, 5, 7 and g inches, 

 s Also subsoiled 6 inches deeper. 

 i Depths were 3 and 7 inches. 



