Nearly one fifth of Chinas farmland contains pollutants such as cadmium, nickel, and arsenic, reports the Associated Press. The news is outlined in a multi-year soil survey released this week by Chinas Environment Protection Ministry and its Land and Resources Ministry. The survey, started in 2005, found that 19.4 percent of Chinas agricultural land is contaminated with heavy metals and other pollutants. The results also indicate that China has an overall soil contamination level of 16.1 percent.