https://orcid.org/0000-0002-1996-119X
Figures & data
Table 1. Soil chemical properties of the three study sites
Figure 1. Rainfall and minimum and maximum temperatures in Meru and Nyandarua sites during the study period
Table 2. Amount of pure nutrients supplied for each treatment
Table 3. Potato leaf area index (LAI) at flowering and tuber bulking stages
Table 4. Haulm dry weight (DW) and harvest index for potato at tuber bulking stage
Table 5. Haulm N, P and K uptake under omission of selected nutrients
Table 6. Potato yield at 60 and 90 days after emergence (DAE)
Figure 2. Percent potato yield response to omission of N, P, K, S and B compared to no fertilizer application treatment at 60 days after emergence in 2016 long rains (a) and 2016 short rains (b)
Figure 3. Percent potato yield response to omission of N, P, K, S and B compared to no fertilizer application treatment at final harvest in 2016 long rains (a) and 2016 short rains (b)
Figure 4. Percent potato yield response to omission of N, P, K, S and B compared to NPKSB treatment at 60 days after emergence in 2016 long rains (a) and 2016 short rains (b)
Figure 5. Percent potato yield response to omission of N, P, K, S and B compared to NPKSB treatment at final harvest in 2016 long rains (a) and 2016 short rains (b)
Figure 6. Regression of potato yields for various treatments against the environmental yield (EY) mean for the 2016 long and short rain seasons
