PLANT FOOD 235 



a. Carefully peel the outside of the lemon, removing only 

 the colored part and cutting off as little of the white part as 

 possible. Put the cuttings into the bottle and cover with 

 about twice their volume of 95 per cent alcohol. Shake the 

 bottle and then allow it to stand for two days. Filter into a 

 clean dish and the extract is ready for use. See reference 

 for full directions for making other extracts. 



170. PLANT FOOD II 



This subject has been covered in the consideration of 

 fertilizers, humus, irrigation, drainage, the work of roots, 

 and the work of leaves. Thus a general review of the whole 

 subject can be taken up and discussed. 



The food acquired by plants is not all utilized immediately, 

 but may be stored, as, for instance, in potatoes, turnips, 

 beets, onions, and in some stalks. The food is used for 

 growth as well as for fruit and seed production. If the amount 

 of food is reduced, the growth of fruit is increased, but at the 

 cost of the plant growth. Reducing the growth of the plant also 

 increases the yield of fruit. Therefore pruning is beneficial. 



Weeds, through a long process of evolution, have become 

 adapted to living better than any beneficial crop. There- 

 fore they are hard to kill, but their destruction is necessary, 

 since they remove large quantities of plant food and water 

 from the soil. 



References : 



1. 1407 : 8-11. The Storage of Food in the Seed. 



2. 1503 :"95-96. Food Storage in Plants. 



3. 1601 : 147-153. Osmosis and Diffusion in Plant Feeding. 



4. 1605 : 68-71. The Manufacture of Food Materials. 



5. 1702:242-246. Movement of Plant Juices Chlorophyll 



and Protoplasms. 



6. Farmers' Bulletin No. 28. Weeds and How to Kill Them. 



