284 GLOSSARY 



Free water. Standing water, or that moving under the influence of 

 gravitation, as distinguished from that held by capillary attrac- 

 tion. 64, 65, 78. 



Function. The particular or appointed action of any organ or part. 

 The function of the eye is vision ; that of the heart is distributing 

 the blood ; that of the root is taking in food. What an organ does. 



Fungicide. A substance which kills fungi. 298. 



Furrow. The trench left by the plow. 91a. [91, 91a. 



Furrow-slice. The strip of earth which is turned over by the plow. 



Gang-plow. An implement comprising two or more individual plows. 

 Figs. 64, 65. 



Geology. The science of the formation of the crust of the earth. 20. 



Germ. See micro-organism. 



Glacier. A slowly moving field or mass of ice ; a frozen stream. 



Glands. Secreting organs. 3636. [39, 39a. 



Gluten. The soluble nitrogenous part of flour. 370. 



GlycogfH. A starch, or starch-like material, formed in the animal body, 

 and from which sugar is formed. 364, 364a. 



Grafting. The practice of inserting a cion or bud in a plant. 236. 



Grazing. Pasturing. 



Green-crops. Crops designed to be plowed under for the purpose o! 

 improving the soil. 74, 109. 



Hard-pan. Hard, retentive subsoil. 94a. 



Harrow. An implement which pulverizes the surface of the ground 

 without inverting it or lifting it. 



Heading-in. Cutting back the tips or ends of branches. 288. 



Heavy soils. Soils which are hard, dense, lumpy, or those which are 

 very fertile. Does not refer to weight. 



Herbivorous. Feeding on plants. 174. 



Horticulture. Arts and sciences pertaining to cultivation of fruits, flow- 

 ers, vegetables, and ornamental plants. It is part of agriculture. 9, 9e. 



Host. An animal or plant on which a parasite lives. 2926. A plant or 

 animal which makes it possible for another plant or animal to grow- 

 alongside of it. 312a. 



Hotbed. A glass-covered box or frame which is artificially heated 

 (usually by means of fermenting manure), and in which plants are 

 grown. 



Humus. Vegetable mold. It may contain the remains of animals. 



Husbandry. Farming, la. [33, 33a. 



Hygroscopic. Holding moisture as a film on the surface. 64, 67. 



Inhibit. To prevent or check. 188. 



