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Table 2 Average annual person days spent on weeding one ha of five crop types in African countries, as reported in peer-reviewed journal articles

From: Towards estimating the economic cost of invasive alien species to African crop and livestock production

  Average SE No. studies
Cereals (excl. maize) 50.0 11.3 10
Legumes 54.2 8.1 18
Maize 54.6 8.3 24
Root crops 92.0 18.9 5
Vegetables 82.7 12.1 20
  1. Indicated are the mean, standard error of the mean and the number of studies on which the values are based