CULTURAL DIRECTIONS 26l 



with lettuce or other vegetables. It should be plantea 

 in very rich soil to secure heads of desirable size. 



Miniature Marrow is similar to St. John Day. It is 

 planted to a limited extent, but seldom by commercial 

 growers. 



343. The Danish Ball Head Group. — The Danish 

 Ball Head is variously known as Emperor, Holland, 

 Hollander, German Export, Armager and Dutch Win- 

 ter (Figure 6j'). It is grown almost exclusively for win- 

 ter use in Denmark, and was introduced into the United 

 States over 20 years ago. The variety has become ex- 

 ceedingly popular as a winter cabbage because of its 

 superb keeping qualities. It is grown extensively in 

 New York and other northern states, where the cabbage 

 industry has developed to a marked degree. For 

 burying or storage it has no equal and is practically the 

 only variety held for mid and late winter sales. There 

 is considerable varietal variation in the type, but the 

 heads are nearly round, very hard and solid and usually 

 range from 3 to 8 pounds in weight, although larger heads 

 are common. A 4-pound head is a good weight, and if 

 all the plants in a field average 4 pounds the crop is con- 

 sidered excellent. This group is not adapted to warm 

 climates or to certain types of soil. A satisfactory crop 

 is seldom if ever groWn on sandy soils. Experiments 

 at the Pennsylvania station indicate that it is not at 

 home on limestone soils. Early sowing is important to 

 secure full yields. 



Danish Round Head is a strain of the Danish Ball 

 Head which ripens from ten days to two weeks earlier, 

 and is therefore valuable for planting when it is too late 

 for setting the Danish Ball Head. 



344. The Volga Group. — Volga (Figure 68) is the 

 only variety belonging to the group. It is highly recom- 

 mended by many seedsmen and some growers are en- 

 thusiastic concerning its merits. The heads are fairly 



