The personnel I see with my eyes and talk to, are not college trained. Facilities may say SAGARPA but the young men running them are hired and employed by the SAGARPA trained jefe. Entiendes? Second - personnel who conduct livestock and poultry inspections are of a TOTALLY different caliber. These are the places the public bypasses because they are not driving a vehicle with animals or fowl. Visitors have zero contact with these puestos.
I tried to stick with productos agricolas in what I wrote above. At the border they are concerned with flesh and fowl. The puntas de revision for animals within the country have NOTHING TO DO WITH TOURISTS.
Sector agropecuario es la parte del sector primario compuesta por el sector agrรญcola (agricultura)
These are the people who inspect EVERYONE. Just like at a reten or puesto de control. The INDIVIDUAL SARGARPA MANAGER can hire people that do not have to be college educated. This, this, this, and that, is FORBIDDEN. These are the folks that tourists come in contact with. When you see someone's spelled words sanhoria, lechuga, saboya, jitomato, this is college education? I haul my mangos past two agropecuarios coming and going. They are Sagarpa, and never have I seen the same young man twice. Why are they young? I asked one (translated) Me dijo el jefe "The boss said to me I have to have the ability to crawl and climb up onto trucks and search to make sure nothing prohibited goes past". Make no mistake about it. Each caseta has a way to communicate with the SSP or Policia de Estatal. To blow by one of these casetas is an infraccion and not a lightweight one. But none of the working personnel I have dealt with at the Sagarpas agricolas have more than a rudimentary education. They are taught to recognize fungicide treatment of my fruit. 23 tons was hauled in August.
Live and learn.
Luego (then) el sector ganadero o pecuario (ganaderรญa). COWS CATTLE, BULLS GOATS, SHEEP, CHICKENS, EGGS, and CERDOS. Inspection for diseases absolutely requires education and training. These places have clear signage and are located well off the shoulder of the highway with a huge lot for truck parking. If someone hauling livestock gets a bold idea to run past without stopping the thought of a fine running eqvt to thousands of dollars, seizure of the vehicle and a few days en el bote tempers their impatience. Every single livestock inspector is certified.
When I brought hens and roosters from the Ejido supply in Lazaro, I had to show the inspector the paperwork and my credenciales. He looked over the fowl closely, counted heads, then signed and stamped the paperwork and kept a copy.
Bottom line. An RV'er is likely to encounter several puestos de agricola on a long trip. Rather than engage in a "fruitless" argument, it's best to travel light. Until the next stop. Claro?
Live and learn...