314 AGRICULTURAL EXPERIMENT STATION. [Jan. 



Pots 10, 11, 12. Plants appeared dark green, very 

 stocky, and were eleven to fifteen inches high. 



Pots 13, 14, 15. Leaves broad, very dark green, and 

 plants twelve to fifteen inches high. 



Pots 16, 17, 18. Same as pots 13, 14, 15. 



On June 4 pots 7,8,9 began to show nitrogen hunger, by 

 appearing a lighter green ; the ends of the leaves were turn- 

 ing yellow. The other half of the nitrate of soda was there- 

 fore added in 350 cubic centimeters of water to pots 7, 8, 9, 

 10, 11 and 12. From this time on (June 4) the plants in 

 pots 1, 2, 3, 4, 5 and 6 grew quite slowly, had a light- 

 green and spindly appearance. On June 22 the oats in all 

 the pots (excepting 10, 11, 12) began to head. The latter 

 showed the heads al)out a week later. 



The plants retained their same relative appearance till 

 harvested. 



The plants in pots 10, 11, 12 were a deep rich green and 

 stocky, but failed to mature much grain, as our tabulated 

 results will show. 



Harvesting. 



The plants were harvested as they matured. The oats in 

 pots 1, 2, 3 were cut, for example, July 23, while those in 

 pots 10, 11, 12 not till August 10. They were cut close to 

 the soil, put in large paper bags, and hung away to dry. 



The photographs that follow show the relative appearance 

 of the plants in pots 1, 2, 3, 4, 5, 6, 7, 8, 9, 13, 14, 15, a 

 short time before harvesting. The photographs of the 

 plants in pots 10, 11, 12, 16, 17, 18 are not presented, for 

 reasons that will be stated further on. 



Comments. 



Pots 1, 2, 3, 4, 5, 6 (see first photograph) have the 

 same general appearance, though the latter contain a trifle 

 more foliage. Pots 7, 8, 9, fertilized with .30 grams of 

 nitrogen from nitrate of soda, and pots 13, 14, 15, with the 

 same amount of nitrogen in the form of dissolved leather 

 (see second photograph) , compare to the eye very favorably 

 one with the other. The plants in the nitrate pots are not 

 quite as tall, but more stocky. 



