A topic that comes up a lot these days during my consultation appointments. Deciding whether our treatments are FIXED or RANDOM is easy, but when we combine experiments – something that is commonly done in Plant Agriculture field – are years, trials, environments FIXED or RANDOM?
I’d like to propose that we talk about this one question during our session this coming week. I’m proposing that you read the following paper in preparation for our discussion. Moore and Dixon do a great job at digging into this topic, but there is still room for a discussion, especially how it relates to your own trials. See you on Wednesday, February 14, 2018.
Moore, K.J. and Dixon, P.M. (2015). Analysis of Combined Experiments Revisited. Agronomy Journal 107(2): 763-771. doi:10.2134/agronj13.0485
Agricultural Statistics 