The phrase "rice yields" refers to the amount of rice that is harvested or produced from a specific area of land or a particular farming method. It tells us how much rice can be obtained from a given source. Full definition
From 1990 to 2004, rice yield in these regions expanded annually at 3.5 %. (irri.org)
More hybrid rice varieties are now becoming available that allow farmers to significantly raise rice yields and thus overall rice productivity and profitability. (irri.org)