Increase of Cabbage Crop by Irrigation 175 



There is thus shown a difference of 105.9 bushels of merchant- 

 able tubers per acre, as an average of two years, in favor of the 

 larger water supply. 



EFFECT OF SUPPLEMENTING THE RAINFALL IN WIS- 

 CONSIN FOR CABBAGE CULTURE 



In the work with cabbage, the rows were set 30 inches apart, 

 and in half of the area the plants were set 15 inches apart in the 

 row, and on the balance of the area 30 inches apart, of the variety 

 Fottler's Drumhead. There were, in all, 22 alternating plots of 6 

 rows each, one half irrigated and the balance not. The soil was 

 a rather heavy clay loam, which had been heavily manured the 

 previous year, and had grown a crop of cabbage and cauliflower, 

 but nothing was added this season. Flat and frequent cultivation 

 was given until the plants were large and nearly covered the ground, 

 July 21, when the first irrigation was made, the irrigated rows 

 being furrowed the same as the potatoes, and not again disturbed. 



The mean weight of heads produced under the two treatments 

 was as follows : 



, Thin planting < Thick planting ^ 



Irrigated Not irrig. Irrigated Not irrig. 



LBS. LBS. LBS. 



Firm heads 7.6 6.95 5.13 



Loose heads 4.88 4.33 3.23 



The weight of the heads dressed for market, computed for one 

 acre, was as expressed in the following table: 



