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- Author or Editor: J. Craig McFarlane x
Abstract
Since publication of the “Guidelines for Measuring and Reporting the Environment for Plant Studies” in HortScience (2, 3, 4, 6), the guidelines have been refined, reviewed, and published in various journals (1, 7, 8, 9, 10, 11, 13, 14, 15).
Abstract
‘Grand Rapids’ lettuce (Lactuca sativa L.) was grown in 4 different controlled environment facilities to establish base-line growth (“normal”) rates under a standard set of environmental conditions. Growing and environmental measurement procedures to minimize variability and environmental measuring instruments to set environmental conditions are described. The variation in growth within laboratories was greater than the variation among laboratories. The base-line data, with described procedures, can be used to compare lettuce growth in other growth chambers and provides a biological check for operation and environmental control in research facilities.
Abstract
‘First Lady’ marigold (Tagetes erecta L.) was grown 3 times in each of 5 different controlled environment facilities to establish baseline growth rates for this species. Plants were grown under a standardized set of environmental conditions established with a common set of standardized instruments. Data on plants grown only once in two additional laboratories are reported for comparative purposes. The variation in growth within each laboratory was greater than the average variation among laboratories for cotyledon length and width, plant weight measurements, and 3rd leaf length but not for leaf width. The base-line growth data, based on the described procedures, can be used to compare marigold growth in other controlled environments and to provide a check on the operational characteristics of research facilities.