t8 
Colorado Experiment vStatton. 
Fig-ure 10.—Plants grown at 80° (top row), 65° (middle row) and 50° 
(bottom lowi tox‘ L\»o moxiLiiy and tiien translex'i'td for live uays to a soil tem- 
right-hand plants were raised from a moisture content of 
40%, the next from 20% to 30%, the left-hand ones remaining at 
10% and 20% respectively. The Fusarium content is marked on the tanks as 
follows: Fvsarmm found, Fusarium not found, —. 
of water and risk of crop to be prodigal with water on lands with 
little slope in hot weatber. 
Observa,tions stated, and to be stated herein, are the basis of 
the following principle which should govern irrig'ators of potatoes: 
Heat, soakage, infection, continuous cropping with potatoes, 
alkali water, poor seed, poor fertility are all against potato health. 
