Maize - Potassium

Summary
Highest Yield Gaps (> 2 t/ha): China, India, Kenya
Removal-to-Use range: 0.6 to 6.8 (Canada vs. India)
Partial Factor Productivity range: 118 to 673 (U.S./Canada vs. Krasnodar, Russia)
Fertilizer Gap range: -42,000 t to 2 M t (Canada vs China)

Notes on Bubble Charts: Charts project average data calculated for the three-most current years. The size of each bubble corresponds to values of the third data dimension plotted. Bubbles positioned farthest to the denote regions with the largest yield gaps. Bubbles floating to the top are regions with higher application rates.

Partial Nutrient Balance (Removal to Use)

Time series data

Partial Factor Productivity

Time series data

Fertilizer Gap (attainable vs. current)

Time series data highlight the growth in the fertilizer K gap in China and the U.S, both beginning to widen around 203 to 2005. India is also showing a trend towards a wider K gap.