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Wiley InterScience

Journal of Forensic Sciences

Journal of Forensic Sciences

Volume 51 Issue 5, Pages 1050 - 1054

Published Online: 31 Aug 2006

© 2010 American Academy of Forensic Sciences



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Yield of Illicit Indoor Cannabis Cultivation in The Netherlands
Marcel Toonen, Ph.D. 1 ; Simon Ribot, B.Sc. 1 ; and Jac Thissen, M.Sc. 1
  1 Plant Research International, Wageningen-UR, PO Box 16, 6700 AA Wageningen, The Netherlands.
Correspondence to  Additional information and reprint requests:
Marcel Toonen, Ph.D.
Plant Research International, Wageningen-UR
PO-Box 16
6700 AA Wageningen
The Netherlands
E-mail: marcel.toonen@wur.nl
Copyright Copyright © 2006 by American Academy of Forensic Sciences
KEYWORDS
forensic science • illicit cultivation • flower buds • growth conditions • marijuana

ABSTRACT

ABSTRACT: To obtain a reliable estimation on the yield of illicit indoor cannabis cultivation in The Netherlands, cannabis plants confiscated by the police were used to determine the yield of dried female flower buds. The developmental stage of flower buds of the seized plants was described on a scale from 1 to 10 where the value of 10 indicates a fully developed flower bud ready for harvesting. Using eight additional characteristics describing the grow room and cultivation parameters, regression analysis with subset selection was carried out to develop two models for the yield of indoor cannabis cultivation. The median Dutch illicit grow room consists of 259 cannabis plants, has a plant density of 15 plants/m2, and 510 W of growth lamps per m2. For the median Dutch grow room, the predicted yield of female flower buds at the harvestable developmental stage (stage 10) was 33.7 g/plant or 505 g/m2.


Received 21 Nov. 2005; and in revised form 15 April 2006; accepted 23 April 2006; published 31 Aug. 2006.

DIGITAL OBJECT IDENTIFIER (DOI)
10.1111/j.1556-4029.2006.00228.x About DOI

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