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Crop Improvement and the Accumulation and Partitioning of Biomass and Nitrogen in Lentil

^a Plant Environment Laboratory, Dep. of Agriculture, The Univ. of Reading, Cutbush Lane, Shinfield, Reading, RG6 9AD, UK
^b USDA-ARS, Washington State Univ., 303W Johnson Hall, Pullman, WA 99164-6434 USA

View larger version (54K): [in a new window]   Fig. 1 Daily temperature mean, minimum and maximum temperature (°C), cumulative mean temperature above a base temperature of 0.5 °C (°C d) and daily rainfall (mm) at Pullman in 1996 and 1997 and at Reading in 1997. Open bars at Pullman in 1997 represent supplementary irrigation

View larger version (31K): [in a new window]   Fig. 2 Biomass, residue yield, and seed yield at reproductive maturity, including dropped seed, for four lentil cohorts. Component means represented by bars which share the same letters within each experiment (i.e., similarly shaded or open bars) are not significantly different at P = 0.05

View larger version (22K): [in a new window]   Fig. 3 The relation between seed yield and biomass at harvest maturity. Both axes are inclusive of material dropped before and during harvesting. Solid lines represent the least squares regressions for three replicate plots of all genotypes except for the outlying cv. Laird plots (see text) which are represented by a cross within the symbols. The regression lines have the equations y = 0.468x - 0.016 (r2 = 0.94) for Pullman 1996, y = 0.389x - 0.196 (r2 = 0.88) for Pullman 1997 and y = 0.329x - 0.281 (r2 = 0.79). The broken lines represent the 95% confidence intervals for these regressions

View larger version (22K): [in a new window]   Fig. 4 The relation between seed yield and residue production at harvest maturity. Both axes are inclusive of material dropped before and during harvesting. Solid lines represent the least squares regressions for three replicate plots of all genotypes except for the outlying cv. Laird plots (see text) which are represented by a cross within the symbols. The regression lines have the equations for Pullman 1996, for Pullman 1997 and . The broken lines represent the 95% confidence intervals for these regressions

View larger version (22K): [in a new window]   Fig. 5 The biomass and dry weights of vegetative and pod material (inset) lost from plants in netted plots sown at Pullman on 12 May 1997. Solid lines represent polynomial regressions for three replicate plots which have the equations: a. ; b. ; c. ; d. ; e. ; f. ; g. ; h. ; i. ; j. ; k. ; l.