Fig. 4
From: Limited impacts of climatic conditions on commercial oil palm yields in Malaysian plantations
Expected yield for the main effect climatic predictors in the final GAMM modelling raw yield: a Tmax at a 14-month time-lag prior to harvest; b rainfall at a 10-month time-lag; c rainfall at a 14-month time-lag. The yield values in these plots were predicted with all other numeric predictors in the model (the two other climatic predictors and oil palm age) held at the median value in the dataset. Yield values and 95% confidence intervals (denoted by dashed lines) were back-transformed from the square-root scale for plotting. These were fitted with a GAMM which also included smoothers for seasonality per plantation and oil palm age (Fig. 2, Additional file 1: Fig. S12), plantation as a random intercept, and an autocorrelation-moving average error structure of order p = 4, q = 4 (Additional file 1: Table S5)