Take a look at Yield: motion chart and Yield: time series chart in this link. (Instruction for motion charts: select all three countries and click play button.)
Since 2000, US and India have been showing almost stagnant yield at a similar level, while China has steadily improved its yield even higher. With a pressure to feed about 20% of the world population on only about 7% of the world’s arable land, Chinese government was alarmed about food shortage and security problem and invested in researches concerning yield, such as irrigation improvements and genetic improvements of grain yield (so-called “Super Wheat”).
The Yield: time series chart shows India’s current wheat production (blue line) and expected wheat production (red line) with an assumption that India had improved its yield to the level of China. If India had improved its yield to the level of China, India could have more than 50% increase in production from the land currently used for agriculture. This way, India would be able to solve food shortage problem that India might have to face in near future because of climate change or population growth. With better irrigation system and higher yield, India can have increase production from the same or even less land with equal or less stress on water resource.
(work by Timothy Gildner and Ju Young Lee)