A UNIT IN AGRICULTURE 



2. Effect of large and small potatoes on yield. 



3. Selection of seed potatoes. 



4. Principal varieties. 



5. Methods of cultivation. 



6. Enemies of the Irish potato and how to fight them: scab, 



dry rot, potato beetles. 



7. Sweet potatoes: principal varieties, method of culture, yield 



and uses as compared with Irish potatoes. 



8. Improvement of potatoes. 



(a) Selection from high yielding hills. 



Literature. 



Farmers' Bulletins, Nos. 35, 91, 295, 324. 



VIII. Cotton. 



1. Study of cotton plant. 



2. Principal types of cotton : 



(a) Sea Island type. 



(b) Upland type. 



3. Conditions of soil and climate favorable to the production of 



cotton. 



4. Planting and cultivation of cotton. 



(a) Preparation of soil. 



(b) Planting. 



(c) Cultivating. 



(d) Harvesting. 



5. Preparation for market. 



(a) Ginning. 



(b) Baling. 



6. Cotton seed and cotton-seed products, importance and use. 



7. Insect enemies of cotton and how to fight them. 



Literature. 



Farmers' Bulletins, Nos. 36, 48, 209, 211, 285, 286, 302, 314, 344. 



fX. Tobacco. 



1. Study of complete plant. 



