A meta-analysis of relative crop yields in cereal/legume mixtures suggests options for management

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Intercropping legumes and cereals increases phosphorus use efficiency; a meta-analysis (2020, methodology): “Unweighted analyses have been successfully used in previous intercropping meta-analyses (Yu et al. 2015, 2016a, b; Martin-Guay et al. 2018; Xu et al. 2020; Li et al. 2020a, b).”
Grain Yield Stability of Cereal-Legume Intercrops Is Greater Than Sole Crops in More Productive Conditions (2021, background): “Yield-stabilizing effects in crops and cropping systems have been investigated in field experiments, but results have been inconclusive [13,14].”
Does intercropping enhance yield stability in arable crop production? A meta-analysis (2017, background): “Recently, a few meta-analysis have compared intercropping with sole cropping, mainly focusing on management factors, intercrop productivity, resource use efficiency etc. (Yu et al., 2016; Yu et al., 2015; Pelzer et al., 2014).”