Suboptimal Maize Spacing Undermines Yields and Diminishes Land Utility in Malawi

Strategic Insights -

Sustainable food systems have been a pressing concern in sub-Saharan Africa, particularly in Malawi, where smallholder maize farming underpins national food security. Research has shown that intensifying maize production through improved plant spacing has been a governmental policy for several decades. However, field-level adoption of these recommendations remains uneven, with widespread deviations driven by factors such as labor constraints and informational gaps.

Key Takeaways:

  • Less than 10% of farms in Malawi had the recommended plant population of 53,333 plants per hectare, with many falling short by 25% or more.
  • Excessively wide ridge and intra-row spacing, as well as the practice of planting multiple seeds per station, limited yield potential and contributed to deviations from recommended plant spacing.
  • Transitioning to improved spacing through mechanization is financially feasible and could unlock yield increases of up to 25%.
  • Addressing agronomic inefficiencies through labor-saving technologies and adaptive policy support is critical to advancing sustainable intensification in the region.
  • The research suggests that smallholder farmers in Malawi face numerous challenges, including land scarcity and low-input strategies, which hinder their ability to adopt recommended plant spacing.
  • Improved plant spacing is essential for maximizing yields and reducing yield gaps in maize production.

Statistics:

  • 240 farms in six agro-ecologically diverse districts in Malawi were assessed to evaluate adherence to national agronomic guidelines.
  • Less than 10% of farms had the recommended plant population of 53,333 plants per hectare.
  • 25% or more of farms fell short of the recommended plant population.
  • Up to 25% yield increase could be achieved through improved spacing through mechanization.

Sources:

  • Suboptimal maize spacing undermines yields and diminishes land utility in Malawi. Frontiers in Sustainable Food Systems, 2025,9. (Frontiers in Sustainable Food Systems - https://www.frontiersin.org/journals/sustainable-food-systems#)
  • The publisher for Frontiers in Sustainable Food Systems is Frontiers Media S.A.
  • A free version of this journal article is available at https://doi-org.sdpl.idm.oclc.org/10.3389/fsufs.2025.1629487.