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GLOSSARY 



Carbonic acid gas, a gas consisting of carbon and oxy- 

 gen. It is produced from the lungs of animals, and by the 

 decay or burning of organic matter. 



Catch crop, a crop growing during the interval between 

 regular crops. 



Cereal, a name given to the grain crops that are used for 

 food. 



Chlorophyl, the green matter in plants. 



Commercial fertilizers, materials containing plant food 

 which are bought and sold in the markets to improve the 

 soil. 



Compost, a mixture of decaying organic matter used to 

 enrich the soil. 



Cross pollination, the pollination of a flower by pollen 

 brought from some other flower. 



Cover crop, a crop to cover the soil during the interval 

 between regular corps. 



Cultivator, a farm implement used to loosen the surface 

 of the soil and to kill weeds after a crop has been planted. 



Cutting, a part of a plant placed in moist soil, water or 

 other medium with the object of its producing roots and 

 making a new plant. 



Dormant, said of plants when they are resting or in- 

 active. Most plants are dormant during the winter season. 



Drainage, the method by which surplus water is removed 

 from the land. 



Element, a substance that cannot be divided into simpler 

 substances. 



Fermentation, the process by which organic substances 

 are broken down or changed and new substances formed. 



Fertility, that state or condition of the soil which en- 

 ables it to produce crops. 



Fibre, long thread-like structure. 



Flocculate, to make crumbly. 



Free water, standing water or water which flows under 

 the influence of gravity. 



Function, the particular action of any part of an organ- 

 ism. 



