Crop Insurance Improvement Act of 2013

[AI summary unavailable — showing source text] Crop Insurance Improvement Act of 2013 - Amends the Federal Crop Insurance Act to make available to crop producers a supplemental coverage option (based on area yield and loss) to cover part of a crop insurance policy deductible. Triggers such option only if area losses exceed 10% of normal levels. Provides for: (1) 70% premium coverage by the Federal Crop Insurance Corporation (FCIC), and (2) coverage to begin no later than crop year 2014. Authorizes FCIC to pay a portion of the premiums for plans or policies of insurance for which the insurable unit is defined on a whole farm or enterprise unit basis that is higher than would otherwise be paid. Makes separate enterprise units available for irrigated and nonirrigated acreages of crops beginning with crop year 2014. Directs FCIC, in developing yield guarantees, to use: (1) county data collected by the Risk Management Agency and/or the National Agricultural Statistics Service, or (2) if sufficient county data is not available data considered appropriate by the Secretary of Agriculture (USDA). Revises the adjustment in actual production history used to establish insurable yields beginning with crop year 2014. Requires FCIC to review …