The combined application of nitrogen and biochar reduced microbial carbon limitation in irrigated soils of West African urban horticulture

Chemical and Biological Technologies in Agriculture

Table 1 Mean yield, N-input, P-input at the experimental sites in Ouagadougou (Burkina Faso) and Tamale (Northern Ghana) over the experimental years 2014 to 2016 taken from Akoto-Danso et al. [4]

Treatment	Yield	N-input	P-input
Treatment	Yield	(kg ha⁻¹ ± SD)	P-input
Ouagadougou
Control-WW	3370 ± 757	31 ± 18	6 ± 3
FP-WW	9246 ± 3356	675 ± 279	139 ± 13
FP + BC-WW	9553 ± 3183	672 ± 285	146 ± 22
Tamale
Control-WW	4116 ± 737	239 ± 43	76 ± 43
Control-CW	1345 ± 733	4 ± 1	0 ± 1
FP-WW	6308 ± 2209	440 ± 123	135 ± 27
FP-CW	4143 ± 2011	205 ± 129	59 ± 35
FP + BC-WW	6527 ± 2546	440 ± 123	139 ± 30
FP + BC-CW	4749 ± 2526	205 ± 129	63 ± 44

In Ouagadougou, 5 crops were harvested in the rainy and 6 in the dry seasons. In Tamale, 7 crops were harvested in the rainy and 6 in the dry seasons. Respective data for the BC treatment were not provided in any previously published study from the experimental sites
SD standard deviation, CW clean water irrigation, WW wastewater irrigation, BC biochar, FP fertilization according to farmers’ practice