I don’t know who told you that sorry it’s not true I’m not nearly that knowledgeable. What comes to mind though is India had a 70% import duty on Rice. They had removed it because of the monsoons they had to import it. They are normally an exporter. Rice is on the rise right now. Here’s a chart and some more information hope that helps.
http://finviz.com/futures_charts.ashx?t=ZR&p=w1
Rice Two Cents Away From “Limit Up” For Second Day In A Row, At Highest Price In Over A Year
http://www.zerohedge.com/article/rice-two-cents-away-limit-second-day-row-highest-price-over-year
Your knowledge is superior to mine. Thank You .... reviewing your provided links.