Page 2 



Group III 



11. Name five important crops of your state. Tell what has been done to im- 



prove each crop. 



12. (a) What chemical compounds are found in a good commercial fertilizer for 



general garden or farm use? (b) Explain the role of bacteria in soils. 



(c) What weeds indicate the need of liming the soil ? (d) Why is rotation 

 of crops advisable ? (e) When should fruit trees be pruned and why at 

 the time specified ? 



13. (a) Name two industries which make use of plant enzymes, (b) Name 



two plants which furnish edible leaves, (c) Name two medicinal seeds. 



(d) Name two plants which furnish rope fibers, (e) Name two plants 

 which have useful latex. 



14. (a) Name four valuable forest trees, stating what constitutes their special 



value. (6) Name four trees used for street planting, giving their good and 

 bad points. 



15. Write a clear, well-arranged topical outline, giving at least three main topics 



and several subtopics under each main topic, on one of the following sub- 

 jects: (a) the importance of the Department of Agriculture; (6) the making 

 of new varieties of plants; (c) seed dispersal; (d) parasitic plants; (e) rela- 

 tions between plants and animals. 



