Table 1b.

Estimated labour requirements (days ha⁻¹) of field operations of maize and legumes under sole crop systems used in estimating TC.

Activity	Cowpea	Soybean	Groundnut	Maize	Source
Sowing	12	17	11	10	Franke et al. (2010)
P&K application	2	4	2	2	Ojiem et al. (2014)
N application	–	–	–	7	Franke et al. (2006)
Spraying	2	–	–	–	Own observation
First weeding	36	36	36	25	Franke et al. (2006)
Second weeding	30	30	30	21	83% of first weedinga
Harvesting	14	14	34	12	Franke et al. (2010)
Threshing	17b	29	46c	23	Franke et al. (2006)

^aHeemst et al. (1981).

^b,cOjiem et al. (2014).

^bIncludes the shelling of groundnut.