PLANT-BREEDING METHODS 



435 



25. Stage and evenness of maturity. 



26. Date of harvesting. 



27. Damage by disease, animals or weather. 



FIG. 182. Plant selection record suitable for oats, corn or beans. (After Surface and 



Zinn.) 



FIG. 183. Progeny row record blank. (After Surface and Zinn.) 



Another biological factor is percentage of soil moisture. Piper also 

 suggests the following standards for variety testing. 



