Robot treats 500k plants per hour with 95% less chemicals [video]
I wonder if recognition of weeds could be made easier by using genetically engineered crop plants with a fluorescent protein.  Shine some UV on them and they're a crop plant if the fluorescence comes back at the right wavelength.Also, can less space be taken up by rows if the farm vehicle is legged?  One would just need spots for the feet to land on.