154 AGRICULTURAL EXPERIMENT STATION. [Jan. 



The above weights of the different mammal substances 

 were taken for the purpose of securing to each plat, as far 

 as practicable, potash, phosphoric acid and nitrogen in 

 corresponding proportions. 



The manurial substances were slightly harrowed under 

 before seeding. The oats were seeded April 29 and 30, 

 in rows, two feet apart, to allow a one-horse cultivator to 

 pass between the rows. Each plat had sixteen rows, and 

 thirty-nine pounds of oats, Pringle's Progress, were in 

 equal weights divided between eleven plats'. A brush seed 

 drill with no plate under the brush w r as used for that pur- 

 pose. 



The young plants appeared above ground on May 5. The 

 plants on plats 6 and 8 appeared sickly, having a 3 r ellowish 

 tint, May 23. The entire field became subsequently some- 

 what infested with plant lice, plats 6 and 8 suffering most, 

 May 26. Cultivator and hoe were used at this stage, to 

 renovate the ground, June 2 and 3. The entire crop, with 

 the exception of that upon Plat 8,. soon improved and 

 recovered entirely. Plat 8 suffered for some days longer 

 than the rest from the infection ; it showed later on a lower 

 and somewhat uneven stand of its oats. 



The shade of the green of the grow T th upon different plats 

 show r ed during the progress of the season in many instances 

 a quite marked difference. Upon plats which had received 

 their nitrogen in the form of sulphate of ammonia, as well 

 as upon those which had received no nitrogen-containing 

 manurial matter, a light-green tint of the foliage was 

 noticed alike in the earlier stages of the growth of the 

 oats. In the latter case this light-green color of the crop 

 remained until the maturing began; in the former case, 

 i. e., where sulphate of ammonia had furnished the nitrogen 

 supply, the color became deeper green as the season 

 progressed. 



The progress of growth varied at times in a marked 

 degree, yet no exceptional differences in height were notice- 

 able at the maturing of the crop. 



The following tabular statement contains the measure- 

 ments of the height of the plants at stated dates : — 



