Appendix I: Weather, soils, cultural practices, and cotton growth data from the 1989 face experiment in IBSNAT format

A major objective of the free-air CO{sub 2} enrichment (FACE) project is to provide data suitable for validation of plant growth models. These models are intended to have the capability to predict the effects of the increasing atmospheric CO{sub 2} concentration and its interactions with climate variables on future plant growth, yield, and water use. And indeed one such model called COTCO2 has been written for cotton in cooperation with the FACE project. Therefore, it is important that the data from the project be assembled for convenient use by modelers seeking to validate COTCO2 or other cotton growth models. The objective of this Appendix is to present these data in a standard format used by many plant growth models (the data are also available on diskette by request). 31 refs.