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Estimating Potato Tuber Yield in a Sub-tropical Environment with Simple Radiation-Based Models

Published online by Cambridge University Press:  03 October 2008

S. S. Prihar ,
V. K. Arora ,
G. Singh  and
R. Singh
S. S. Prihar
Affiliation:
Pepsi Agro Food Processing Research Institute, 136-D, Kitchloo Nagar, Ludhiana, India
V. K. Arora
Affiliation:
Department of Soils, Punjab Agricultural University, Ludhiana, India
G. Singh
Affiliation:
Department of Agrometeorology, Punjab Agricultural University, Ludhiana, India
R. Singh
Affiliation:
Department of Agrometeorology, Punjab Agricultural University, Ludhiana, India
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Summary

Dry matter and tuber yields of potato grown in a sub-tropical environment were estimated employing simple radiation-based models which require meteorological information on air temperature and solar radiation. Two versions of the MacKerron and Waister (1985) model, in which estimation of dry matter accumulation relies on a single composite parameter, radiation use efficiency (RUE), were compared with the Versteeg and Van Keulen (1986) model, which explicitly accounts for temperature and radiation effects on dry matter accumulation. In the original version of the MacKerron and Waister model, a linear change in the radiation interception factor with leaf area index is assumed; in the modified version an exponential change in the interception factor with leaf area index is considered. The accumulation of dry matter estimated from all three models was close to the measured values throughout the growing season, but estimates of tuber yield differed widely. Our analysis showed that the best agreement with measured values was obtained using the MacKerron and Waister linear model with RUE values adjusted according to the incident radiation level.

Estimatión del rendimiento del tubérculo de la patata

Type
Research Article
Information
Experimental Agriculture , Volume 31 , Issue 1 , January 1995 , pp. 65 - 73
Copyright
Copyright © Cambridge University Press 1995

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