Study Challenges Perceptions of Stagnating Global Crop Yields

A recent study publicado em PLOS ONE by John Baffes of the World Bank and Xiaoli Etienne of the University of Idaho refutes the notion that global crop yields have stagnated in recent decades. Instead, the research indicates that crop yields have consistently grown at a stable rate since the 1960s, despite regional and crop-specific disparities.

As global population projections approach nearly 10 billion by 2050, ensuring sufficient food production is critical. Technological advancements, including the development of improved crop varieties, have driven much of the progress in agricultural productivity over the last six decades. However, concerns have persisted about potential slowdowns in production growth, particularly in low- and middle-income countries experiencing rapid population growth.

The study analyzed 144 crops, representing 98% of global agricultural land, using a standardized approach to measure agricultural productivity. This methodology allows for accurate comparisons of yield trends across different countries and regions. The findings show no overall decline in the global growth rate of crop yields, with any reductions in specific areas or crops being offset by gains elsewhere.

The researchers estimated an annual yield growth equivalent to 33 kilograms of wheat per hectare globally. While this sustained growth is promising for global food supply, the study cautions that challenges such as climate change, rising food demand, and sustainable production practices remain significant barriers to achieving long-term food security.