A new report out of Virginia Tech University concludes that increasing agricultural productivity is not enough to meet demand for global ag production by 2050.  Specifically, the report says that,  … since 2011, average annual agricultural total factor productivity (TFP) growth has consistently fallen below the target growth rate required to sustainably meet global needs for agricultural outputs by 2050. TFP is simply a measure of the output of crops and animal protein (including aquaculture) using the same or less inputs such as land, labor, capital, fertilizer, feed, and livestock.  According to the report, from 2011–2021, global TFP grew at an average of 1.14 percent annually; to meet the needs of 2050 a rat...