BEIJING (Reuters) - New Chinese tariffs on American agricultural goods will affect some $21 billion worth of U.S. exports, a Reuters analysis of U.S. census data showed.

The biggest blow by value will be to the U.S. soybean trade, the country's largest agricultural export to China, which will be hit by a 10% tariff and was worth just shy of $13 billion last year, the data showed.

Reuters estimated the overall impact by comparing the 740 items listed by China on Tuesday against the U.S. census' trade database.

Categories such as vegetables or aquatic products contained hundreds of individual items, ranging from frozen haddock fish to onions. In the case of pork or beef, tariffs covered frozen and fresh meat as well as offal.

For a complete list of the 740 items published by China's Ministry of Finance see here.