44 Journal of the Mitchell Society [August 



The nodal tissues of corn growing in the field are more or less dis- 

 colored, and the discoloration is particularly noticeable in the ' ' poor ' ' 

 spots. This discoloration has been attributed by Dr. G. N. Hoffer to 

 accumulations of iron. 



Plan of Experimental Work 



The experiments discussed here were outlined by Mr. R. W. How- 

 ell, manager of the Nissen Farms, and have been conducted as a 

 private enterprise. The writer has acted in the capacity of advisor 

 since the fall of 1921. The experiments have been carried on one 

 year. They consist of 13 cultural treatments which are crossed by 

 limestone in varying amount; by fertilizers and manure in constant 

 amount on both limed and unlimed blocks, and by checks. 



Results and Discussion 



When the reaction to drying noted above was observed the writer 

 recommended ridging of the land so as to allow a maximum of field 

 drying. This cultural treatment has resulted in an increase in the 

 corn crop of from 20 ^c to 100 9^ per cent with an average of 45% 

 over flat breaking. Average results from fertilizer treatments are 

 shown below. 



Table 1. Per Cent Increase in Corn With Different Fertilizer 



Treatments 



Average 

 Increase 



Kainit (480 lbs. per A.) 20% 



Limestone and kainit 50% 



Limestone (1 to 4 tons per A) 1% 



Nitrate of soda (160 lbs. per A) 40%> 



Nitrate of soda and limestone 40% 



Nitrate of soda and acid phosphate — loss 4% 



Nitrate of soda and phosphate and limestone 37% 



Nitrate of soda and kainit 56% 



Nitrate of soda and kainit and limestone 60% 



Nitrate of soda \ 



Kainit V 39% 



Acid phosphate ) 



Nitrate of soda 



^^i^it I 49% 



Acid f)hosphate i 



Limestone 



