For livestock - they have routine blood screenings for disease and nutrient deficiencies. Rotation through pasture is decided via nutrient content and growth rate of pasture plants. Breeding and genetic lines are strictly controlled via artificial insemination. Animal growth rates, health, and any number of other factors are tracked long-term to decide lineages to keep, modify, or eliminate. All feed supplements are planned to absolutely optimize feed/meat conversion ratios.
The problem with farming isn't that the data doesn't exist, or that the technology isn't being used. It's that the data lives in 18 different places, some in my head, and that the technology is ungodly expensive.
The only way I can see to make SV and ag work well would be to focus on what would otherwise be mid-sized businesses. Large scale operations already have the tech and data. The farmers who run operations of <2000 acres can't afford the large scale purchases, and do much of what I talked about via 'inherent' and 'inherited' knowledge (i.e. they know the north pasture needs to be emptied for two months early spring, but don't know how to improve the plant growth there without messing everything up).
One of the founders worked since his early teens driving large machines during harvest season. He said that agriculture is already now able to be fully automated, from GPS controlled tractors and such to milking and feeding robots. I had the same revelation, modern farming is way more tech heavy automated than I thought.