42 



ELEMENTS OF FARM PRACTICE 



than others. Those that do withstand such unfavorable 

 conditions and are best adapted to the soil and climate 

 will be likely to do better and produce better and more 



perfect seed than will 

 other plants. The heavi- 

 est and plumpest seeds 

 are selected when seeds 

 from the best and most 

 vigorous plants are se- 

 cured. Hence, when a 

 farmer selects the heavy, 

 plump seeds raised on his 

 own farm, he not only 

 Zya^.' sets good, strong seed. 



Figure 15.— Diagram of a Fanning Mill, show- but Seed adapted tO his 



ing a good method of grading seed grain. 0^.:] ov^/^ plimQfA 



The blast blows the lighter kernels over the SOU aUQ CUmate. 

 end of screen No. 3, in with the market HeaVV SCed grOWn m 



grain. The heavy kernels fall on this screen. .Z r' c a.\ 



The smaller of these go through into market SOmC Otncr part OI tue 



grain, leaving only the heavy large kernels cOUUtry is USUallv heavy 

 to go into the seed gram. '^ . *' '^ 



because it grew under 

 favorable conditions rather than because it came from es- 

 pecially strong plants. The heaviest home-grown seed is often 

 better to sow than still heavier seed from other locahties. 

 Questions: 



1. What law of Nature must be considered in raising plants 

 and animals? 



2. What are the throo qualities that all good seed must possess? 



3. What two kinds of seed can you usually find, if you examine 

 a good, pure sample of grain? 



4. What are the three parts of a seed, and the purpose of each? 



5. Why is heavy, plump seed better than small or shrunken? 

 Arithmetic: 



1. Land at the Minnesota Experiment Station, seeded with 

 heavy, plump seed oats, yielded 9.5 bus. per acre more than similar 

 land seeded to light weight oats. What was the additional income 

 per acre from heavy weight seed if oats are worth 38c. per bushel? 



2. If 2 bus. of heavy seed oats (sown on one acre) give an 

 increased yield of 9.5 bus. what would be the increased yield from one 

 bushel of heavy weight seed oats? 



3. If one bushel of heavy weight seed oats gives a yield of 4.5 

 bus. more than is secured from a bushel of light seed, what is the 

 value of one bushel of heavy weight seed when oats are worth 38c. 

 per bushel? 



Note: If the light weight seed is worth 38c. per bushel, the heavy 

 graded seed will be worth 38c. plus 4.5 times 38c. 



