The results of an experimental indoor hydroponic Cannabis growing study, using the ‘Screen of Green’ (ScrOG) method—Yield, tetrahydrocannabinol (THC)

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Presentation transcript:

The results of an experimental indoor hydroponic Cannabis growing study, using the ‘Screen of Green’ (ScrOG) method—Yield, tetrahydrocannabinol (THC) and DNA analysis  Glenys Knight, Sean Hansen, Mark Connor, Helen Poulsen, Catherine McGovern, Janet Stacey  Forensic Science International  Volume 202, Issue 1, Pages 36-44 (October 2010) DOI: 10.1016/j.forsciint.2010.04.022 Copyright © 2010 Elsevier Ireland Ltd Terms and Conditions

Fig. 1 “indica-like” plant, Grow 1. Forensic Science International 2010 202, 36-44DOI: (10.1016/j.forsciint.2010.04.022) Copyright © 2010 Elsevier Ireland Ltd Terms and Conditions

Fig. 2 “sativa-like” plant, Grow 1. Forensic Science International 2010 202, 36-44DOI: (10.1016/j.forsciint.2010.04.022) Copyright © 2010 Elsevier Ireland Ltd Terms and Conditions

Fig. 3 Flowering head of “indica-like” plant, with male flowers, female flowers, and development of immature fruit, Grow 1. Forensic Science International 2010 202, 36-44DOI: (10.1016/j.forsciint.2010.04.022) Copyright © 2010 Elsevier Ireland Ltd Terms and Conditions

Fig. 4 Mature plants, day 113 since planting clones, Grow 1. Forensic Science International 2010 202, 36-44DOI: (10.1016/j.forsciint.2010.04.022) Copyright © 2010 Elsevier Ireland Ltd Terms and Conditions

Fig. 5 Harvested head from “indica-like” plant, Grow 1. Forensic Science International 2010 202, 36-44DOI: (10.1016/j.forsciint.2010.04.022) Copyright © 2010 Elsevier Ireland Ltd Terms and Conditions

Fig. 6 Cuttings from “sativa-like” plant (left), and “indica-like” plant (right), Grow 1. Forensic Science International 2010 202, 36-44DOI: (10.1016/j.forsciint.2010.04.022) Copyright © 2010 Elsevier Ireland Ltd Terms and Conditions

Fig. 7 Grow 2: nutrient burn. Forensic Science International 2010 202, 36-44DOI: (10.1016/j.forsciint.2010.04.022) Copyright © 2010 Elsevier Ireland Ltd Terms and Conditions

Fig. 8 Grow 3: spider mite web on flowering head. Forensic Science International 2010 202, 36-44DOI: (10.1016/j.forsciint.2010.04.022) Copyright © 2010 Elsevier Ireland Ltd Terms and Conditions

Fig. 9 Yield of each of six plants in each of three grows. Forensic Science International 2010 202, 36-44DOI: (10.1016/j.forsciint.2010.04.022) Copyright © 2010 Elsevier Ireland Ltd Terms and Conditions

Fig. 10 THC results for six randomly selected samples from each of six plants in Grow 1. Forensic Science International 2010 202, 36-44DOI: (10.1016/j.forsciint.2010.04.022) Copyright © 2010 Elsevier Ireland Ltd Terms and Conditions

Fig. 11 The mean THC, with a band of ± one standard deviation, of six THC measurements, for each plant of Grow 1. Forensic Science International 2010 202, 36-44DOI: (10.1016/j.forsciint.2010.04.022) Copyright © 2010 Elsevier Ireland Ltd Terms and Conditions

Fig. 12 THC results for six randomly selected samples from each of six plants in Grow 2. Forensic Science International 2010 202, 36-44DOI: (10.1016/j.forsciint.2010.04.022) Copyright © 2010 Elsevier Ireland Ltd Terms and Conditions

Fig. 13 Mean THC results for each of the six plants in Grow 2. Forensic Science International 2010 202, 36-44DOI: (10.1016/j.forsciint.2010.04.022) Copyright © 2010 Elsevier Ireland Ltd Terms and Conditions

Fig. 14 THC results for six randomly selected samples from each of six plants in Grow 3. Forensic Science International 2010 202, 36-44DOI: (10.1016/j.forsciint.2010.04.022) Copyright © 2010 Elsevier Ireland Ltd Terms and Conditions

Fig. 15 Mean THC results for each of the six plants in Grow 3. Forensic Science International 2010 202, 36-44DOI: (10.1016/j.forsciint.2010.04.022) Copyright © 2010 Elsevier Ireland Ltd Terms and Conditions

Fig. 16 Graph depicting the relationship between the first two principal coordinates obtained from principal component analysis of the Grow 1 and Grow 3 populations. Underlined numbers indicate plants sharing the same point on the graph. Forensic Science International 2010 202, 36-44DOI: (10.1016/j.forsciint.2010.04.022) Copyright © 2010 Elsevier Ireland Ltd Terms and Conditions