Tree height can be expressed as a function of an overall constant, random block effects, random family effects and a normally distributed residual (this is our base model, m1).
We have the trial assessed for tree height (ht) at 2 years of age, where a plot also shows some spatial trends, with better growth on the top-left corner this is the trait that I will analyze here.
Qplot(col, row, fill = Surv, geom='tile', data = cravens) A quick look at survival shows an interesting trend: the bottom of the trial was much more affected by frost than the top. The trial follows an incomplete block design with 148 blocks and is testing 60 Eucalyptus bosistoana families. Plantation forestry trials are usually laid out following a rectangular lattice defined by rows and columns. In addition to sitting in a conference room and having nice sandwiches we went to visit one of our progeny trials at Cravens. Last Wednesday I had a meeting with the folks of the New Zealand Drylands Forest Initiative in Blenheim.
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