You can check sentinel-1 radar data by yourself from open sources, example near Calgary, Alberta.

Radar sensors were not created to measure vegetation, you can extract some knowledge from them with additional modeling (you can detect harvesting day, for example). Do they also provide zoning based on radar data, any other data sources (elevation, soil/yield data analysis)? Have you compared their maps to the same maps derived from optical sensors? 

Many imagery solutions make a bad job of cloud and shadows detection. We have data in GeoPard from Sentinel-2, Landsat, and Planet on demand, there are always more than a few images per season. Please check our blog post about this issue. Also to mention, you can calculate LAI based on optical sensor data. We support 12 indices.

You have data from Sentinel-2 every 5 days and every 3 days if you are lucky and your fields are located on the intersection of S2 tiles. 

I've attached and image, field is located in Iowa, it had ~5.5 images per month and about 4 of that images per month are cloud and shadow free.

If you send me your field location, we can will show the data and analysis you can have.
 

Cheers,
Dmitry

(GeoPard_Iowa_field_images_2020 (full).png)

(GeoPard_field_potential_elevation (full).png)

GeoPard_Iowa_field_images_2020 (full).png (64KB - 114 downloads)

GeoPard_field_potential_elevation (full).png (99KB - 110 downloads)