308 



Elementary Principles of Agriculture 



all the valuable varieties that have been introduced, have 

 resulted from the careful multiplication of seed from 

 selected plants. The average grain grower may not care 



. to take the time 

 to make the head 

 row tests to im- 

 prove his seed, but 

 it would be more 

 profitable to do so 

 than to continual- 

 ly plant common, 

 mixed, field run 

 seed, as is com- 

 monly practiced. 

 When the seed 

 from selected 

 heads of the same 

 variety of grain 

 are planted in ad- 

 jacent drills, we 

 have a chance to 

 compare the dif- 

 erences in their 

 progeny. The 



Fig. 197. Head rows of wheat showing differences Seed from the best 



that may be noted when seed from different stools :! ,}:.. Vi^nrl rnw 



are planted in adjacent rows. yielding Head TOWS 



Kansas Agricultural C ^ uged ^ plant 



increase blocks and so on until enough seed is secured to 

 plant a large field. (See Figs. 197 and 198). 



444. Preparing Land for imall Grain. As a general 

 rule, breaking land intended for small grain well in ad- 

 vance of seeding, will give considerably larger yields than 

 late breaking. Breaking to a depth of less than 4 to 5 



