[1]
van Averbeke, W., Juma, K. and Tshikalange, T. 2018. Yield response of African leafy vegetables to nitrogen, phosphorus and potassium: The case of <i>Brassica rapa</i> L. subsp. <i>chinensis</i> and <i>Solanum retroflexum</i> Dun. Water SA. 33, 3 (Dec. 2018), 355–362. DOI:https://doi.org/10.4314/wsa.v33i3.180595.