. Cyclopedia of farm crops, a popular survey of crops and crop-making methods in the United States and Canada;. Farm produce; Agriculture. 510 PEA PEA New "York, 1904; Handbuch der Papier Kunde, Klemm, Leipzig, 1904 ; Die Cellulose Fabrikation, Schubert, Berlin, 1906; An Elementary Manual of Paper Technology, Sindall, London, 1906; Philip- pine Fibers and Fibrous Substances, Richmond, Philippine Journal of Science, i., 433, 1906. PEA, AS A FIELD CROP. Pisum sativum, var. arvense, Poir. Leguminosm. Figs. 732-734. By /. L. Stone. The pea is grown as a field crop for the produc- tion of grai
. Cyclopedia of farm crops, a popular survey of crops and crop-making methods in the United States and Canada;. Farm produce; Agriculture. 510 PEA PEA New "York, 1904; Handbuch der Papier Kunde, Klemm, Leipzig, 1904 ; Die Cellulose Fabrikation, Schubert, Berlin, 1906; An Elementary Manual of Paper Technology, Sindall, London, 1906; Philip- pine Fibers and Fibrous Substances, Richmond, Philippine Journal of Science, i., 433, 1906. PEA, AS A FIELD CROP. Pisum sativum, var. arvense, Poir. Leguminosm. Figs. 732-734. By /. L. Stone. The pea is grown as a field crop for the produc- tion of grain for stock-feeding and for the manu- facture of " split peas " for culinary use, for canning in the factories, for forage and green-manuring and to supply the seed trade. The pea is the most important member of the genus Pisum. It is native to Europe, but has been cultivated from before the Christian era for the rich seeds. It is an annual, glabrous and glaucous, tendril-climbing; the stipules are large and leafy; the leaflets are oval or ovate, two to three pairs, the leaf ending in tendrils; the flowers are few, on an axillary peduncle. The field-, or stock-pea differs from the garden pea usually in its violet or purple rather than white flowers, its smaller and more uniformly smooth seeds, but chiefly in the less tenderness and sweetness and lower quality of the green seeds. History. The pea is generally supposed to be a native of southern climates and was well known both to the Greeks and to the Romans, frequent mention being made of it in the works of old writers on rural. Fig. 732. Keia-pea. subjects. A form of gray pea still growing wild in Greece is supposed by some to be the original form of all the highly domesticated varieties be- longing to the species. The pea has been known and cultivated in England for centuries. Most of the early English writers on agricultural topics mention it either as a -garden vegetable or as a farm crop. Lydgate, a writer in the
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