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ALLAN R. E., 1964, CROP SCI, V4, P338, DOI 10.2135/cropsci1964.0011183X000400030032x
[2]
ALLAN R. E., 1961, CROP SCI, V1, P328, DOI 10.2135/cropsci1961.0011183X000100050009x
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ALLAN R. E., 1963, CROP SCI, V3, P538, DOI 10.2135/cropsci1963.0011183X000300060025x
[5]
CHOWDHRY, 1963, CROP SCI, V3, P53
[6]
KUSPIRA JOHN, 1957, CANADIAN JOUR PLANT SCI, V37, P300