What is stopping farmers to not plant anything to protest? Hear my out!

If bankers strike, banks are closed and banking serivces are disrupted. If doctors strike, except for emergency services, no medical service is available in the hospital. So essentially they are striking in their professional space and disrupting the services offered. If farmers want to protest, currently road blocking is publicised as nuisance by media and farmers are ignored. Why can't they just stop planting crops? They can of course plant some area of their fields for their own usage or maybe barter at village level where one farmer grows vegetables and the other grows wheat. If they simply stop growing anything for sale, prices go up, government will have to act. Of course the reserve stocks will be mobilised to control prices but for how long? Within 1-2 crop cycles, govt will have to come to the negotiation table. I am not instigating anyone, just sharing an opinion.