The claim itself is biased/opinionated in phrasing, but the farmer support and seasonal work visas claims are technically correct.
Rural voters did largely vote for Trump according the 2024 AP VoteCast (around 63%, a 3% increase from the 2020 election). According to a poll from AgWeb, >70% farmers favored Trump's abilities regarding issues including inflation, farm policy and crop insurance, and trade expansion.
As for supporting farmers via seasonal worker visas: While Trump hasn't spoken on increasing seasonal worker visas since his re-election, there is precedent to believe he would. "Seasonal work" visas fall under the H-2A program, which allows for 10 months of agricultural work. In his first term, Trump expanded the temporary work visa programs by 13%, according to FERM. That being said, "roughly half of hired crop farmworkers lack legal immigration status" (ERS), and according to the Trump's mass deportation plan, which is now underway, these farm workers would all be deported. It's expected that Trump will expand the H-2A program to meet this agricultural labor deficit. "The administration has signaled plans to expand these programs to meet labor shortages in agriculture and hospitality, while imposing stricter compliance requirements on employers." (EconoTimes) Brooke Rollins, Trump's pick to lead the USDA, said she "would work with lawmakers to modernize a temporary visa program for farmworkers." (New York Times)
AP VoteCast: A visual explainer of how key groups voted in 2024 | AP News
Presidential Poll Results: How Farmers and Economists View Candidates' Impact on Agriculture - AgWeb
How Trump’s deportation plan could actually increase migrant labor | Food and Environment Reporting Network
Farm Labor | Economic Research Service
Brooke Rollins, Trump’s Agriculture Pick, Addresses Tariff and Immigration Impact on Farmers - The New York Times
What changes will Donald Trump make to visa programs during his second term? - EconoTimes