Glossary of Ecology (6th ed.) by Krebs (2009)
- in an experimental design a control is a treatment or plot in which nothing is changed so that it serves as a baseline for comparison with the experimental treatments to which something is typically added or subtracted.
Glossary of "Plant Biology (1st ed.)" by Graham et al. (2003)
- The unmanipulated replicates in an experimental design used for comparison to the experimental replicates to decrease the probability that observations are in error.
- Graham, L. E., Graham, J. M. & Wilcox, L. W. 2003. Plant Biology. -xxxv + 497 pp. Pearson Education, Inc., Upper Saddle River.
- Krebs, C. J. 2009. Ecology, 6th ed. -xvi + 655 pp. Pearson Benjamin Cummings, San Francisco.