Solutions for landforming and agricultural water management T3RRA Cutta is the easiest and most comprehensive in-cab package for agricultural land-forming. You can survey, design, and implement - all without leaving the tractor. Backed by the support and knowledge of your John Deere™ dealer network, T3RRA Cutta™ works with John Deere iGrade™ to allow you to sculpt your farm terrain to your exact specifications. T3RRA Cutta™ is wizard based - it guides you through the landforming process, from elevation collection to to design implementation. Absolutely the simplest and most intuitive software in the business.