LETTUCE. 63 



FERTILIZER FORMULA. 



Available phosphoric acid 9 per cent. 



Potash 12 per cent. 



Nitrogen 5 per cent. 



Use 800 to 1,000 pounds per acre of the above for- 

 mula. If land is rich in nitrogenous matter, the 

 amount of nitrogen may be cut down to suit the land. 

 In a cold frame or hot-bed, use a pound for every 

 twelve square feet. 



The following amounts of materials will give the 

 quantity of each element called for in the formula : 



Elniient. Pounds of different materials for one acre. 



, / 600 to 1,200 Ibs. acid phosphate ; or 

 Phosphoric acid. { 5(K) to ^ lbs disso Y ve / b one 



f 900 to 1,500 lbs. kainit; or 



| 200 to 250 lbs. muriate of potash ; or 



Potash -J 200 to 250 lbs. sulphate of potash; or 



I 400 to 500 lbs. sulphate of potash, and 

 I sulphate of magnesia. 



(600 to 1,200 lbs. cotton-seed meal ; or 



Nitrogen \ 250 to 500 lbs. muriate of soda; or 



1 200 to 400 lbs. sulphate of ammonia. 



FIGURE 5. 

 Figure 5 represents a lettuce head of the solid varieties ready to ship. 



VARIETIES. 



The best all-round lettuce is the Grand Rapids. 



