GLOSSARY 287 



Prottid. Albuminoid; organic nitrogenous compound. 442, 442, 450, 451. 

 Pruning. Removing part of a plant for the betterment of the 



remainder. 278. 



Ptomaine. A product of decomposition of dead tissue. 409a. 

 Ptyalin. The ferment ill saliva. 380. 

 Puddling. The cementing together of the particles of soils, rendering 



them hard and stone-like. 81. 



Range. A pasture, particularly one of large extent. 488. 

 Kut ion. The material fed to an animal. 

 Rennet. The digestive principle derived from the fourth or true 



stomach of ruminants : or the dried stomach itself. 8926. 

 Retentive. Holding, retaining. 

 Reverted . Said of phosphates which are in the process of becoming 



insoluble. 145. 



Boot-fnp. The tissue covering the very tip of the growing root. 206. 

 Hoot pasturage. The area of soil particles exposed to or amenable to 



root action. 53a, 90. 



Rotation. A systematic alternation of crops. 112, 305, 305a. 

 Roughage. Forage, 330; particularly coarse forage. 



Sanitation. Looking after the health, especially making the condi- 

 tions such that disease or injury is prevented. 

 Sap. The juice or liquid contents of plants. 207a. 

 Saturated. Full of water, so that it cannot hold more. 

 Scarify. To scratch or to harrow lightly. 

 Secretion. A special product derived from the blood : as saliva, gastric 



juice. 3(53. 



Seed-bed. The earth in which seeds are sown. 243. 

 Seedling. A plant grown from seed, and not changed to another kind 



by grafting or budding. 2416. 

 Siliciotm. Sandy. 

 Slifi. A cutting. 



Soil. That part of the surface of the earth in which plants grow. 24. 

 Soiling. Feeding green fresh forage, in stable or field. 

 Sport. A variety or form which appears suddenly, or is very unlike the 



type. 485. 

 Stock. The plant into which a cion is set. 236. The parentage of any 



group or line of animals or plants. The animal tenants of a farm ; 



live-stock. 



Stomn, xtomate. A breathing-pore. 188, 188a. 

 Subsoil. That part of the soil which lies below the few inches of 



ameliorated and productive surface soil. It is usually harder, 



lighter colored, and poorer in plant-food than the surface soil. 



