Harry F. Clements 463 



taken. The agreement of the two sets of values in the second column 

 is evidence of the validity of the equation used. It is quite clear that 

 the great variation in yields which is obtained is traceable to the climate 

 of the area. 



The differences between the items of the first column and those in the 

 second represent the difference between the yields which are possible 

 and those actually obtained. There are only two cases where agreement 



TABLE IX 

 Estimated Yields at Several Locations for Two- Year Crops 



Normal Moisture, Actual Moisture, 



Location tons cane per acre tons cane per acre 



Ewa 122 127 (128)* 



Waialua 120 95 (101) 



Paia 127 97 (93) 



Kihei 135 104 (99) 



Upolu 124 100 (90) 



Halelua 106 78 (71) 



Puakea 109 86 (86) 



Maulili 79 57 (5 1 ) 



Puuokumau 62 66 (50) 



*Actual yield at each place appears in parentheses. 



is good. In others, there is a considerable margin between what is pro- 

 duced and what might be expected. At Paia, Kihei, Upolu, and Halelua 

 the departures are quite large. These four places are very windy. Crops 

 on these fields invariably show low moisture levels or whipped leaves. 

 Partial solution of the problem here appears to lie in the development 

 of windbreaks. Although this is helpful, it is probable that planting 

 the rows of cane closer together with a strong-topped variety will help 

 to get the wind off the field. 



In some of these areas the soil is very compact and hard. In these 

 areas no matter how frequent the irrigation, the moisture level remains 

 low. Obviously, anything which will loosen these soils and improve their 

 texture and permit a better penetration of roots and irrigation water 

 will help raise the moisture level of the plants and thereby increase 



