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Effect of Time of Seeding on Yield, Milling Quality, and Other Characters in Rice 1
Author(s) -
Adair C. Roy
Publication year - 1940
Publication title -
agronomy journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.752
H-Index - 131
eISSN - 1435-0645
pISSN - 0002-1962
DOI - 10.2134/agronj1940.00021962003200090006x
Subject(s) - yield (engineering) , seeding , citation , quality (philosophy) , advice (programming) , division (mathematics) , agriculture , mathematics , agricultural science , agronomy , horticulture , political science , computer science , library science , arithmetic , history , philosophy , biology , physics , programming language , archaeology , epistemology , thermodynamics
G are vitally interested in information on the best date for sowing rice (Oryza saliva L.) in order to obtain maximum yields per acre of high milling quality. It is especially important, as has been pointed out (6),~ to know how new varieties and selections react when sown on different dates. In response to date of seeding and environment, rice varieties may be grouped as "indifferent" or "sensitive." When sown early in the spring, the "indifferent" varieties head and mature in the summer or early fall, whereas the "sensitive" varieties do not usually head and mature until fall. Jenkins (6) classed the "indifferent" varieties having a "fixed growing period" able to head and mature during longer photo periods, while the "sensitive" varieties, described by Nelson (~o) as having "a marked power of adaptation," head and mature during the shorter fall days. The growth period of all varieties is shortened to some extent when sowing is delayed, but varieties differ in degree of response and this difference in response is heritable and one of the outstanding characteristics of rice varieties. A date of seeding experiment in nursery plots was started at the Rice Branch Experiment Station, Stuttgart, Ark., in ~9~e to obtain additional information on the effect of seeding date on the yield, growth, and quality of rice varieties. The results are reported in this paper.