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Measurements were made from plants in the three inner rows. The outer two rows and the ends of the inner rows were ignored, their purpose being to protect the inner plants from influences of adjacent plots. One week after first emergence five plants in each of the three inner rows were selected at random for weekly measurement of height and number of leaves over a period of four weeks. They were tagged for ease of identification at each week of measurement.
Total biomass yield, grain yield and harvest index were calculated from harvesting all inner plants at 3 months. The skeleton analysis of variance for biomass and grain yield demonstrates that there are more than sufficient degrees of freedom for the residual term.
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This method did lead to some bias since only a proportion of the shoots had
emerged when the 15 plants were selected. During the four weeks of measurement
of height and number of leaves these will have likely remained amongst the
tallest. This was unavoidable but the primary interest was to compare trends in
growth between the two cultivars.
