224 Subtropical Vegetable-Gardening 



used to obtain the amounts of each of the fertilizer ele- 

 ments called for in the formula : 



Ammonia 



'POUNDS TO THE ACHE 



300 to 500 cottonseed meal ; or 

 180 to 300 dried blood; or 

 120 to 200 nitrate of soda ; or 

 100 to 150 sulfate of ammonia. 



Phosphoric acid . . . 420 to 700 acid phosphate. 



500 to 900 of kainit ; or 

 p , 80 to 140 muriate of potash ; or 



90 to 150 high-grade sulfate of potash; or 

 160 to 240 low-grade sulfate of potash. 



Enemies. 



The pea weevil which attacks the young peas in the 

 pod can be killed in the dry seed by the use of carbon 

 bisulfide. 



The powdery mildew, which spreads over late pea vines, 

 can be checked entirely by bordeaux mixture, and probably 

 by the use of sulfur. 



Varieties of peas. 



The garden peas may be divided into those with round 

 seed, with wrinkled seed, and with edible pods. Those 

 with wrinkled seed are better, but they are not so hardy as 

 the round-seeded varieties. The sugar peas with edible 

 pods are worth growing in the garden. 



For shipping purposes, the dwarf varieties should be 

 chosen. American Wonder and Blue Beauty do well. 



