Closed mkao006 closed 10 years ago
Non-linearity in the yield is commonly observed, at least in Cassava. This causes the current linear imputation to break down sometimes.
The effect of non-linearity is restricted by taking data only from 1980, additive mixed model is also in development for non-linearity
The current data set only spans 12 years and thus a linear trend is acceptable, however if we extend our our time frame to 60 years, non-linearity such as stagnant growth maybe observed, a smoothed spline mixed model may be preferred.