494 BIOLOGY FOR BEGINNERS 



Milk and Us Products, Wing; Types and Breeds of Farm Animals, Plumb; 

 Commerce and Industry, Smith, pp. 20-85; Principles of Breeding, Daven- 

 port; Domesticated Animals, Shaler; First Principles of Agriculture, GoS 

 and Mayne; Science of Plant Life, Transeau, pp. 217-232. 



PLANT BREEDING 



Elementary Studies in Botany, Coulter, pp. 326-339; New Creations in 

 Plant Life, Harwood, entire; Origin of Cultivated Plants, De Candolle, 

 entire; Experiments in Plants, Osterhout, pp. 409-453; Botany for Schools, 

 Atkinson, pp. 455-478; The Living Plant, Ganong, pp. 426-444; Species 

 and Varieties (Mutation), De Vries, entire; Domesticated Animals and 

 Plants, Davenport, entire; Elementary Biology, Peabody and Hunt, 

 pp. 105-125, 241-300. 



DOMESTIC ANIMALS 



Elementary Zoology, Davenport, pp. 420-450; Domesticated Animals 

 and Plants, Davenport, entire; Economic Zoology, Kellogg and Doane, 

 pp. 321-334; Pet Book, Comstock, entire; Farm Bulletins. 



SUMMARY 



1. Importance of agriculture. 



2. Lack of efficient development. 



3. Soil formation. 



4. Soil composition: 



Potassium compounds. 

 Phosphorous compounds. 

 Nitrogen compounds. 

 Organic matter or humus. 



5. Soil maintenance. 



By fertilizers. 



By bacterial action. 



By crop rotation and cultivation. 



6. Plant breeding. 



7. Plant protection. 



From insect enemies. 

 From fungus attack. 



8. Animal husbandry. 



Care and feeding of stock. 

 Breeding new forms. 



9. Bacteria on the farm. 



