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Long‐Time Trends in Grain Yields of Five Rice Varieties 1
Author(s) -
Adair C. Roy,
Cralley E. M.,
Johnston T. H.
Publication year - 1958
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/agronj1958.00021962005000050001x
Subject(s) - agronomy , nitrogen fertilizer , fertilizer , mathematics , biology
Synopsis The average yields of Fortuna increased each 7‐year period of the 28 years. The 7‐year average yields of the 4 varieties susceptible to diseases present during the period varied according to prevalence or control of specific diseases. White tip control appears to be necessary to get a maximum response from nitrogen fertilizer in susceptible varieties. Short or long term yields may be a poor basis for predicting comparable yields of rice varieties that differ in disease reaction.