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Influence of weather and technology on corn and soybean yield trends — Comment

✍ Scribed by Terence Lin Kuang-hsing; Stanley K. Seaver

Publisher
Elsevier Science
Year
1981
Weight
276 KB
Volume
23
Category
Article
ISSN
0002-1571

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✦ Synopsis

Lin, Kuang-hsing T. and Seaver, S.K., 1981. Influence of weather and technology on corn and soybean yield trends --comment. Agric. Meteorol., 23: 169--174.

Recently Swanson and Nyankori (1979) reported regression results for corn and soybean yields collected from well-managed University of Illinois farms, and concluded that crop yields of these farms have not reached a plateau. It is an interesting study. However, it appears to the authors of this comment that their conclusion is unwarranted.

The estimated regression functions of y = a+blT+b2 T2 and Y = a+blT+ b2x/T. * The estimated b values for functions 1--3 were all positive in tables V and IX of Swanson and Nyankori.

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