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The Effect of Reduced Light
Classification of Long and Shortday Plants Tested in Experiments
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100-watt lamps 17 Sept 25 July 28 Poor 30 days additional light Amer artificial light Asparagus sprengeri Aster black sateen cloth bloom Bull Calendula cent Centaurea cyanus check plot cloudy days Coreopsis Coreopsis tinctoria Cyclamen persicum day length Delphinium difference earliness Effect of length electric light Euphorbia pulcherrima ﬂowering Four hours Gladiolus Gladys Pearson Golden Glory greenhouse grown growth of plants Hort hours during cloudy hours of additional hybrida Iberis umbellata inches increased daylight period Jour July 16 Aug July 16 Sept July 21 length of day Light Check Light light intensity Lilium longiflorum Narcissus poeticus nitrates nitrogen October Papaver rhoeas photoperiodism plant length pompons Proc produced received 4 hours response Rose Perfection Scabiosa atropurpurea Schizanthus pinnatus Shades applied showed Silver Sheen Snow White square feet stem length Stevia TABLE temperature tests treatment varieties W. E. Gladstone