D013. Split-split-plot design of two apple cultivars

The data file can be downloaded here:

Split-split-plot experiment of apple trees with different spacing (spacing), rootstock (stock), and cultivars (gen). The yield (yield) of apple in kg/tree was recorded over a 4 years period. The design of the experiment included 5 blocks (rep) of 3 rows (row). In each rep there were 3 different tree spacing (note that in several instance, one type of spacing spanned across 2 rows). For each spacing level there were 4 types of rootstock, and finally, each type of rootstock had 2 different varieties (Archbold et al. 1987).

d013 <- read.table(here::here("data", "ARCHBOLD_APPLE.txt"), header = TRUE)

rep	row	pos	spacing	stock	gen	yield	trt
R1	2	1	6	Seedling	Redspur	70.9	601
R1	2	2	6	Seedling	Golden	130.9	602
R1	2	8	6	MM111	Redspur	114.5	611
R1	2	7	6	MM111	Golden	90.5	612
R1	2	3	6	M0007	Redspur	151.8	671
R1	2	4	6	M0007	Golden	125.0	672
R1	2	5	6	MM106	Redspur	NA	661
R1	2	6	6	MM106	Golden	NA	662

The experimental design was as follows:

Archbold, D., G. Brown, and P. Cornelius. 1987. Rootstock and in-row spacing effects on growth and yield of spur-type “delicious” and “golden delicious” apple. Journal of the American Society for Horticultural Science. 112(2):219–222.