4 
Colorado Experiment Station 
versdy proportionate to the sexual development of the plant; tha 
the most degenerate tuber is grown by the plant which carries fulh 
developed flowers and virile pollen; while those plants on which onh 
the female portions of the flowers appear to be fully developed pro 
duce tubers intermediate in form and yield, and that the best tuber: 
and the laigest yield are produced by the type of plant whose bud: 
do not even swell. 
Practical Bearings .— I he way is opened to study out: 
1. What conditions insure productive seed potatoes. 
2. How to grow potatoes free from defects. / 
3 * "WEat ai e the best changes of seed potatoes, and why. 
4. How best, if way there be, to grow Pearl seed potatoes withoul 
change. 
Additional light may be secured thereby on all problems of plant 
production where the seed is not the desired end. 
occasional stem nodes, and which tints the underground part of the mail 
hTthe others 6 m ^ sorts “ dee P in the Blue Victor, and faintly pinl 
_ We go minutely into the characteristics of these three sorts because 
1 is essential to our reasoning that the varieties are one, with three sorts o 
three * dolors and ^7°^ ° f tuber ^generacy occurin th. 
ductfont tubers of TtlZVJZtil C ° nf °" nd ' d with the <**"<* -fro 
n^r^ llk f’i am ° ng t 1 he , three varieti es, we find the same ideal types, the same 
Pi n/ U t, erS ’ ? nd tbe same degenerate forms. With tubers No's 4 and 5 
Si: 
i , on f[ Pearls, the bastards.are whiter and more waxv in mlnr 
Esaae*** wewrtaaHkS 
"“SsSSsIsSSSr'r ~ “ 
and^oiTsoils Vangfngbrom” light' sanll'to^la a nd^Slol?eet! 
sage brush, to that of irrigated alfaffn f 1 y , SCant , buffal ° grass or scantier 
fertility and nitrogen content d See Bulletin P A ha ? S t lJ" excel ! ed \ n natural 
cussion of The Potato Indusiry of Colorado ° f thlS Statl ° n f ° r a dis ’ 
of farming 0 ’ " 0 ^^,^^^°^” £ T °t the m0St hi ^ specialized 
and of the potato industry The f 01 " j be , Sake °* tbat comm unity 
of the Station andisanou t-* ow th of 11 *? Un ^ Up °» the previoiIS work 
potatoes and the intricate oroblemQ n f that f * plnt at . GreeIe y which makes 
wherever farmers the leadin ^ topic 
women’s country clubs or when’npil? f at „ the °P, en meetings of the 
Other Names: Of the Peari-Pee 7 taIk „ST? !r the fence in the field. 
Mammoth White Pearl and in the^ F e . er,ess ’ Whlte Victor, Valley Prize, 
Great Britain. Of^P^plWpXVT’p^l.pt'rPa^ 0 " 5 ' ^ ° f 
