GreenStart's mission is to foster a resilient energy and food system for New Hampshire by providing technical education and practical agricultural examples. An educational non-profit organization established in 2006, GreenStart sees food and fuel security as the end-product of a vibrant, sustainable agriculture system in New Hampshire.
New Hampshire has 40% of its land area in agricultural soils, yet farms only 10% and imports 95% of its food and fuel. New Hampshire has no significant petroleum resources. To feed and fuel itself from sustainable natural resources, New Hampshire must improve its soils while also improving production.
To achieve this end, GreenStart facilitates projects that
1) increase soil carbon “banking”
2) decrease energy inputs
3) increase both food and fuel outputs (positive energy and carbon balance)
4) promote “tight” cycling of nutrients
5) provide opensource access to appropriate knowledge, seeds and equipment
Looks like RTK is also mentioned to add precision (http://en.wikipedia.org/wiki/Real_Time_Kinematic)
but I think there are many potential applications with lesser precision requirements - like basic record keeping, and assuring a good spread pattern or when no-tilling or tedding, or tine weeding when it is hard to see where you have been previously(some times) and a little overlap is OK, and manual correction is still possible. The precision for total automation seeding is also different then holding a heading when a manual backup and correction is possible. A fairly rough system would still enable more attention to be dedicated to cultivator or transplant adjustment etc. Fun discussion to add to the electric allis G, farmbot, and the weeder platforms etc...