DEPARTMENT OF SOIL TECHNOLOGY. 



TEACHING. 



1. Registration. — During the year 1909-10, this department gave 

 instruction to 227 persons, of whom 215 were undergraduate and 12 

 graduate students. The' total number of student credit hours of instruc- 

 tion given was 629, divided as follows: elementary, 471 hours; advanced, 

 158 hours. The graduate students were classified as follows: major 

 subjects for doctor's degree, 5; minor subjects for doctor's degree, 2; 

 major subjects for master's degree, 3; minor subjects for master's 

 degree, 2. 



2. Courses of study. — Nine courses of instruction were offered, two 

 being elementary courses and seven advanced courses. One new course 

 of two hours, on Irrigation and Drainage, was offered, and it is expected 

 that this will develop into two independent courses of two hours each. 



3. Changes in equipment. — There have been no important changes in 

 equipment during the year. 



INVESTIGATION. 



Investigations conducted under the Adams Fund are kept distinct 

 from all others, and to avoid confusion these are here stated. 



Adams Fund Investigations. 



1. Influence of soil moisture and temperature on the availability and 

 utilization of plant nutrients in the soil. 



2. A study of the composition and concentration of soil water under 

 different methods of soil treatment. 



3. Examination of certain properties of an unproductive soil. 



4. Investigations of the conditions under which lime is removed from 

 the soil, and of the changes that accompany it. 



Other Experiments and Investigations. 



1. Examination of the chemical composition and of certain physical 

 properties of the more important types of soil in the State. 



2. A comparison of the practice of fertilizing for the hay crops with 

 that of fertilizing for the grain crops in a rotation of timothy three years, 

 followed by corn and oats, each one year. 



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