Philip Falcone’s proposed LightSquared wireless service would “create massive interference” with precise agricultural gear guided by global positioning systems, Deere & Co. told federal regulators. Tests conducted in New Mexico show the performance of Deere’s GPS receivers deteriorated within 22 miles of a LightSquared base station, Deere said in a filing Tuesday with the Federal Communications Commission.

“There are major economic consequences,” said Deere, the world’s largest maker of farm equipment. “Deere customers in agriculture, construction, and other applications will lose high-accuracy navigation in and near areas served by LightSquared.”