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PRACTICE 16. 

 PREPARATION OF PLANT FOOD SOLUTIONS.* 



Solution No. i. Nitrogen: Dissolve 80 gm. of ammonium nitrate in 

 2500 cc. of distilled water. Use 10 cc. per pot. 



Solution No. 2. Phosphorus: Dissolve 25 gm. of monocalcium phos- 

 phate in 2500 cc. of ammonia-free water. Use 10 cc. per pot. 



Solution No. 3. Potassium: Dissolve 50 gm. of potassium sulfate in 

 2500 cc. of ammonia-free water. Use 10 cc. per pot. 



Solution No. 4. Magnesium : Dissolve 20 gm. of magnesium sulfate in 

 2500 cc. of ammonia-free water. Use 10 cc. per pot. 



Solution No. 5. Iron: Dissolve o.i gm. ferric chlorid in 250 cc. of 

 ammonia-free water. Use I cc. per pot. 



Prepare these solutions carefully, using chemically pure salts, and label 

 each bottle. 



*To be done by the instructor. 



