Abstract
SUMMARYA mathematical plant competition model developed by Currah (1975), and subsequently modified by the author, is briefly described. The model has two useful properties: (a) it can cope with complex irregular row spacing systems such as occur in commercial practice and (b) it can be ‘calibrated’ to the yield values at any site by using data from previous crops.Parameter values of the modified model are calculated for both carrot and red beet crops. At least 70% of the variation in these data could be accounted for by fitting the model, a performance which was similar to, but never as good as, fitting analysis of ariance models. There were no systematic deviations between the fitted and observed values.Previously estimated parameter values were used to predict mean root weights of carrot and red beet storage roots. Overall agreement between predicted and observed data was good, although some systematic deviations occurred.The practical value of the modified version of the model and its strengths and weaknesses are discussed.
Publisher
Cambridge University Press (CUP)
Subject
Genetics,Agronomy and Crop Science,Animal Science and Zoology
Reference11 articles.
1. Frappell B. D. (1968). Plant density studies with red beet. M.Sc. thesis, University of Birmingham.
2. The Effects of Plant Density, Spatial Arrangement and Time of Harvest on Yield and Root Size in Carrots
3. Further studies on the effects of plant density, spatial arrangement and time of harvest on yield and root size in carrots
4. Benjamin L. R. & Fellows J. R. (1980). Plant size variation in root crops. National Vegetable Research Station Report for 1979, pp. 98–99.
5. Currah I. E. (1975). Some factors affecting the size of plants in the carrot crop. Ph.D. thesis, University of London.
Cited by
4 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献