Dr Tony Miller, John Innes Centre (IMAGE) John Innes Centre Caption Dr Tony Miller from the John Innes Centre has developed rice crops with an improved ability to manage their own pH levels, enabling them to take up significantly more nitrogen, iron and phosphorous from soil and increase yield by up to 54 percent. Credit The John Innes Centre Usage Restrictions Please reference the John Innes Centre License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.