l66 PRINCIPAL INTRODUCED NONGRASSLTKE FORAGE HERBS 



tested, it fails to come up to the requirements, it is to be returned 

 with no obligation on the part of the buyer. 



4. Obtain the seed far enough in advance of the seeding time 

 to ascertain the facts concerning its value. 



QUESTIONS 



1. (a) What clovers are especially valuable for pasture? (b) Which of 

 these will probably withstand the heaviest grazing? Why? 



2. What are the objections, if any, to the use of sweet clover as a pasture 

 and hay plant? 



3. (a) To what regions are the bur clovers adapted? (b) How many 

 species of bur clover occur commonly in the United States? (c) On what 

 type of soil does toothed medic, or bur clover, grow best? (d) Where the lands 

 are not seeded naturally, how much seed of toothed bur clover should be sown 

 to the acre? 



4. (a) Where are cowpeas grown most extensively in this country? 

 (b) How do the various varieties of cowpeas differ in habit of growth? Is the 

 same form equally well suited for the production of hay and for pasturage? 

 If not, why? (c) How are cowpeas usually sown, and how much seed is used 

 per acre? 



5. (a) In what States are soybeans grown extensively? (b) Compare the 

 uses of soybeans with those of cowpeas. (c) When should soybeans be planted, 

 how is the seeding done, and how much seed is sown to the acre? 



6. (a) How many species of vetch are commonly grown? (b) Are they 

 annual or perennial plants? (c) How much seed of hairy vetch should be 

 sown to the acre (i) when seeded with small grain, and (2) when sown alone? 

 id) Discuss the value of the vetches as pasture forage and as hay. 



7. (o) In what region of the United States is velvet bean successfully 

 grown? (b) Discuss the cultural methods, (c) Discuss the value of velvet 

 bean as a forage and hay plant. 



8. (a) When was Japan clover, or lespedeza, introduced into this country? 

 (b) To what region is Japan clover best adapted? (c) Discuss the cultural 

 methods best suited to Japan clover, (d) Discuss the value of lespedeza as a 

 forage plant. 



9. (a) What are the requirements of "good" seed? (b) How would you 

 determine the degree of purity of the seed of grasses, clovers, and the like? 



10. Describe some simple device for determining seed germination. 



11. What precautions in general should be taken to obtain good, genuine 

 seed? 



BIBLIOGRAPHY 

 Carrier, Lyman. Lespedeza as a Forage Crop. U. S. Dept. of Agr. 

 Farmers Bui. 1143, 1920. 



