Contract Farming and Smallholder Farmer Productivity in Northern Ghana: Does Farm Size Matter?. Ghana Journal of Science, Technology and Development, [S. l.], v. 9, n. 1, p. 89–104, 2023. DOI: 10.47881/368.967x. Disponível em: https://www.gjstd.org/index.php/GJSTD/article/view/368. Acesso em: 10 sep. 2025.