so we've been doing crop scouting manually and with a Mavic 3 Multispectral for the past two seasons and honestly the NDVI data has been great for spotting stress zones early but we're at the point where we want to close the loop and actually spray variable rate instead of just flagging problem areas for the ground crew

looking hard at the Agras T40 right now. the 40kg payload sounds impressive but i'm more interested in whether the terrain following actually works well in uneven vineyard rows - we've got some pretty significant grade changes across the property and i've read mixed things about how it handles slopes over like 15 degrees

also curious if anyone has integrated prescription maps from their multispectral data into the spraying workflow. in theory it should work if you're generating shapefiles and importing into the DJI ag app but i havent seen many people actually doing this end to end, most posts i see are either pure monitoring or pure spraying not combining them

any real world experience appreciated, not just the spec sheet stuff

been running the T30 for about 18 months on row crops and just got access to a T40 demo unit last month. the terrain following is genuinely good on moderate slopes, we had no real issues up to maybe 20 degrees but i'd be a little cautious making promises about steeper vineyard grades - a lot depends on how consistent your RTK signal is and whether you've done a proper terrain mesh before the mission

the prescription map integration is real but its a bit clunky honestly. you basically need to export your variable rate zones as a compatible format and the DJI smart farm platform can ingest it, but the variable nozzle control isn't as fine-grained as you might hope coming from like an ag econ background where you're used to sub-meter precision. it works but expect some fiddling to get the flow rate calibration dialed. also battery swaps are fast but you will need a solid ground crew to keep throughput up, the tank empties faster than you think on dense canopy

not running an Agras but i did a demo day with one last spring and the terrain following demo they ran was actually pretty impressive, they had it working a pretty choppy field and it tracked well. that said demo conditions are always ideal so grain of salt and all that

curious what multispectral platform you ended up going with for the Mavic 3M, we're looking at adding one to our setup for next season and i've heard the calibration panel workflow is kind of annoying?