Ecological and Edaphic Drivers of Yam Production in West Africa

Table 4

Nutrients removed by D. rotundata tubers in a rice-yam rotation system under urea fertilizer application in Nigeria.

Treatments	N	P	K	Ca	Mg
	g kg^−1
Control	32c	17	59	0.7	1.2
Rice fertilization	33c	19	60	0.7	1.2
Yam fertilization	38b	17	51	0.6	1.3
Rice and yam fertilization	41a	18	51	0.6	1.2

Data source: Kikuno et al. [65]. Letters in the first column indicates significant differences among the treatments at 5% level by Tukey test. The rest were not significant. No deviations were stated.