SEEDS ANH SOWING. 165 



According to Walkhoff, at a temperature of 15° C. 

 (59° F.), the number of days required is — 



13 daj-s for seeds at a depth of 6 mm. (0.24 inch ) 



9 " " " " " 13 " (0.51 inch.) 



9 " " " " " 19 « (0.74 inch.) 



9 " " " " " 26 " (1.02 inch.) 



The next important question is to know the distance 

 most favorable to place the roots advantageously to the 

 farmer and sugar manufacturer. This again varies 

 with the soil, as the richer and deeper it is, evidently 

 the neai'er the roots can be placed, as a poor soil, for 

 example, would require a greater number of square 

 inches in surface to furnish the necessary nourishment 

 than a rich one. 'No definite rule can here again be 

 given, as this does not vary proportionately either to 

 the size of the root or to the space ; but it is certain 

 that the greater the space the larger the root, and 

 consequently the smaller the quantity of sugar. We 

 might conclude from this the importance of placing 

 them as near as possible — evidently within certain 

 limits, as otherwise the growth of the beet would be 

 greatly retarded. 



In the beet-growing farms the most suitable dis- 

 tance has been sought for, and the solution varies with 

 circumstances. The seeds can be planted in three 

 positions : 1, squares ; 2, lozenges (or oblique lines) ; 

 3, rectangles (straight lines). A glance at figs. 32, 

 33 will be sufficient to prove that the amount of space 



