386 Elementary Principles of Agriculture 



Pollen. The powdery mass borne by anthers. It is necessary for 



the formation of seeds. 

 Potash. A substance containing potassium. 

 Predaceous. Living by preying, or pillaging. Said of insects that 



attack and destroy other kinds. 



Protoplasm. The living substance. "The physical basis of life." 

 Proteids. Organic substances rich in nitrogen. 

 Ration. A daily allowance of food for an animal. 

 Rotation (of crops). A systematic order of succession of crops on 



the same land. 



Roughage. Dry, coarse fodders. 

 Sap. The watery solutions in plants. 

 Saprophyte. Living on dead organic matter. 



Scion. A shoot, sprout or branch taken to graft onto another plant. 

 Science. "Systematized common sense." Knowledge gained and 



verified by exact observation and correct thinking. KNOWLEDGE 



deals with simple facts, without reference to inter-relations. 



ART refers to something to be done. SCIENCE to something to 



be known and understood. 

 Sepals. The segments of the calyx. 



Silage. Green feed cut up and preserved without loss of succulence. 

 Silo. A place for keeping silage. 

 Smut. A term to designate the fungi that produce the blasting of 



the fruits and leaves of plants, as oat smut: 



Soil. That part of the earth's crust permeated by the roots of plants. 

 Soiling. The practice of feeding green plants in the stables. 

 Spiracle. Breathing pores of an insect's body. 

 Spore. The one-celled reproductive body of the lower plants. 

 Sport. A marked variation from the parents that appears suddenly. 

 Stamen. The part of a flower bearing the anthers with pollen 

 Starch. A carbohydrate found In plants 



Sterilize. To destroy all the germs or spores in or on anything. 

 Sterile Plants. Plants that do not set seed. 

 Stigma. The part of a pistil that receives the pollen. 

 Stover. Dry stalks of corn from which the ears have been harvested. 

 Stoma (plural, stomata). The minute openings in the epidermis 



of leaves. 



Subsoil. The layer of soil below the surface layer of cultivated soils. 

 Superphosphate. Phosphates that have been treated with sulphuric 

 acid to render the phosphates soluble. 



