PLANT-BREEDING METHODS 



429 



used in all the plant-breeding work at that station. These forms il- 

 lustrate the sorts of records which it is necessary to keep; the sheet for 

 data on varieties would have to be designed especially for each crop plant. 



Harvested 



Plot No. 



Lait Year In 



Length 



Ft. Breath 



Ft. Area 



Manure 



Seed Used 



Amount of Seed Used 



DUpoial of Crop 



\\hy I'luntcd:- 



I 



SOMETHING? A Blank Pa|e Connji Ho Information 

 Suggest: the OUerver was Blind . 



FIG. 175. Facsimile of plot record sheet used in oat variety tests at the Maine Experiment 

 Station. (After Surface and Barber.) 



FIG. 176. Facsimile of oat breeding record used in oat variety tests at the Maine Experi- 

 ment Station. (After Surface and Barber.) 



The experimental errors involved in variety testing may be considered 

 under two heads: (1) accidental errors such as incorrect weighing, 



