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Shade and Temporal Distribution of Pod Production and Pod Set in Soybean

Dep. of Plant and Soil Science, Univ. of Kentucky, Lexington, KY 40546-0312

View larger version (27K): [in a new window]   Fig. 1. The effect of continuous shade on pod production profiles (each data point represents the number of pods 10 mm long that were marked on that date). Bars represent, for each treatment, the average standard error of the mean after excluding means approaching zero. Shade treatments were applied at approximately growth stage R1 and maintained until maturity. Times of reproductive growth stages R1, R3, R5, and R6 are shown on the x axis.

View larger version (28K): [in a new window]   Fig. 2. The effect of continuous-shade treatments on surviving pod profiles (marked pods that were full size and contained at least one developed seed at maturity). For each treatment, bars represent the average standard error of the mean after excluding means approaching zero. Shade treatments were applied at approximately growth stage R1 and maintained until maturity. Times of reproductive growth stages R1, R3, R5, and R6 are shown on the x axis.

View larger version (32K): [in a new window]   Fig. 3. The effect of large changes in the radiation environment midway in the flowering and pod set period on pod production (each data point represents the number of pods 10 mm long that were marked on that date) profiles. Bars represent, for each treatment, the average standard error of the mean after excluding means approaching zero. The arrows indicate when plants in the transfer treatments were moved into and out of shade. Times of reproductive growth stages R1, R3, R5, and R6 are shown on the x axis.

View larger version (30K): [in a new window]   Fig. 4. The effect of large changes in the radiation environment midway in the flowering and pod set period on surviving pods (marked pods that were full size and contained at least one developed seed at maturity) profiles. Bars represent, for each treatment, the average standard error of the mean after excluding means approaching zero. The arrows indicate when plants in the transfer treatments were moved into and out of the shade. Times of reproductive growth stages R1, R3, R5, and R6 are shown on the x axis.