FEEDS AND FEEDING. 335 



9. Take seeds of flax, cotton, sunflower or castor bean. Crush 

 them and rub between the fingers. You will detect the oil. 



10. Burn some alfalfa, charcoal or wood. The part remaining after 

 they are burned is mineral matter, called ash. 



11. Burn bone. W'hat is left? Why do we sometimes feed 'charcoal 

 to hogs? 



NOTE TO TEACHERS : Get from local dealers a collection of samples 

 of concentrated feeds. Place these in (bottles and label each. 



Write to manufacturers for samples of oil, cottonseed, corn, lin- 

 seed and other products. 



Feeding Questions and Problems. 



1. W'hat do you understand by "digestible nutrient"? Nutritive 

 ratio. Digestion co-efficient? 



2. What are the principal classes of nutrients in plants? 



3. What are the principal constituent compounds of bones? Of 

 muscles ? 



4. Considered with reference to feeding stuffs, define concentrate?, 

 roughage, balanced ration, carbohydrates, protein, ether extract, nitrogen- 

 free extract, crude fiber. 



5. What do you understand by "condimental" foods? 



6. Why should animals be fed a balanced ration? 



7. Should a 'horse that is idle receive the same kind and amount 

 of food as one at 'hard work? Give reasons for your answer. 



8. Why is it usually advisable to combine concentrates and rough- 

 age in a feeding ration ? 



9. Should a dairy cow in full flow of milk, and a steer being 

 fattened for beef be fed the same ration? Give reasons. 



10. Determine the amount of dry matter, and digestible nutrients 

 in the following feeds and calculate the nutritive ratio: 



Clover hay 12 pounds 



Corn silage 20 



Cornmeal 4 " 



Wheat bran 4 



Gluten feed 4 " 



11. Prepare a ration for fattening steers weighing I'oOO pounds, mak- 

 ing your own selection of feeding stuff. 



12. Prepare a similar ration for a dairy cow weighing 900 pounds. 



Books. 



Feeding Standards, Wolf - Lehman. 

 Feeds and Feeding, W. A. Henry. 

 The Feeding of Animals, W. H. Jordan. 



