AGRICULTURE 
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Grapes = Vinyards Viticulture 
Form divisions 01-09 may be used as under 634.9 Forestry 
General questions 
Divided like 631 
Hindrances Blights Pests 
Divided like 632 
Ampelografy: grape botany Varieties 
Botany 
Divided like 581 
Inheritance; degeneracy etc. 
Domestication of the grape 
Hybrids 
Natural or accidental 
Artificial 
Direct bearers or producers 
Culture without grafting and spraying 
Varieties 
By time or season 
Precocious, early, late 
By climate or latitude 
Northern, olive belt, orange belt, tropical 
By soil 
Clay, limestone 
By form of fruit 
Round, oblong, irregular 
By color of fruit 
2 White 4 Red 6 Black or blue 
Resistant varieties 
Phylloxera resistant 
Mildew resistant 
Varieties resisting the elements 
2 Frost 4 Sun 
84 American species and stocks: nativ 
841 General questions 
09 Hybrids originating or developt in America 
For general works only. Clas a special hybrid with the wilder of its 
parent stocks 
091 Americo-American hybrids 
094-099 + Vinifera-American hybrids 
Divided by the number for the country, like 940-999, e.g. British. 
American hybrids 634.8410042 
Euvites 
Ripariae Rupestreae 
Ripariae 
Vitis riparia or Vitis vulpina 
River, riverbank, riverside, sweetscented, or winter grape 
Hybrids 
Bacchus, Berckmans, Canada, - Clevener, Clinton, Elvira, 
Empire State, Etta, Faith, Grein golden, Marion, Mon- 
tefiore, Noah, Oporto, Peabody, Tavlor or Bullitt 
Vitis rubra 
Red or cat grape 
842. 
843 
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