Example dataset containing real data reported by Cate & Nelson (1971) from Freitas et al. (1966).
Soil test potassium values (STK) and relative yield as percentage (RY).
this data frame has 24 rows and the following 2 columns:
- RY
relative yield, %
- STK
soil test potassium, ppm
Source
Freitas et al. (1966) cited and used by Cate & Nelson (1971). Soil Sci. Soc. Am. Proc. 35:658-659