132 HATCH EXPERIMENT STATION. [Jan. 



Part IY. — Compilation of Analyses of Fruits, 

 Garden Crops and Insecticides. 



H. D. HASKINS. 



1. Analyses of fruits. 



2. Analyses of garden crops. 



3. Relative proportions of phosphoric acid, potassium oxide and 



nitrogen in fruits and garden crops. 



4. Analyses of insecticides. 



A computation of the results of a chemical analysis of 

 twenty prominent garden crops shows the following average 

 relative proportion of the three essential ingredients of plant 

 food : — 



Parts. 



Nitrogen, 2.2 



Potassium oxide, 2.0 



Phosphoric acid, 1.0 



One thousand pounds of green garden vegetables contain, 

 on the above stated basis of relative proportion of essential 

 constituents of plant food : — 



Pounds. 



Nitrogen, 4.1 



Potassium oxide, 3.9 



Phosphoric acid, 1.9 



The weight and particular stage of growth of the vege- 

 tables when harvested control, under otherwise corresponding 

 conditions, the actual consumption of each of these articles 

 of plant food. Our information regarding these points is 

 still too fragmentary to enable a more detailed statement 

 here beyond relative proportions. It must suffice for the 

 present to call attention to the fact that a liberal manuring 

 within reasonable limit paj^s, as a rule, better than a scanty 

 one. (C. A. Goessmann.) 



