The tariffs are not just on steel and aluminium. The media greatly over simplifies. The tariffs are on many hundreds of categories of items including tractors and farm implements.
Here's details on just two of the many sets of tariffs that have been announced or are in place:
Trump, China tariff full list of goods, products - Business Insider
Here's a couple exerpts: (I do not know what nesoi means but it's all over the lists).
8432.10.00 Plows for soil preparation or cultivation
8432.21.00 Disc harrows for soil preparation or cultivation
8432.80.00 Agricultural, horticultural or forestry machinery for soil preparation or cultivation, nesoi; lawn or sports ground rollers
8432.90.00 Parts of agricultural, horticultural or forestry machinery for soil preparation or cultivation; parts of lawn or sports ground rollers
8433.20.00 Mowers nesoi, including cutter bars for tractor mounting
8433.30.00 Haymaking machinery other than mowers
8433.40.00 Straw or fodder balers, including pick-up balers
8433.51.00 Combine harvester-threshers
8433.52.00 Threshing machinery other than combine harvester-threshers
8433.53.00 Root or tuber harvesting machines
8433.59.00 Harvesting machinery or threshing machinery, nesoi
8701.91.10 Other tractors of engine power <18kW, for agricultural use
8701.91.50 Other tractors of engine power <18kW, not for agricultural use
8701.92.10 Other tractors of engine power => 18kW but < 37kW, for agricultural use
8701.92.50 Other tractors of engine power => 18kW but < 37kW, not for agricultural use
8701.93.10 Other tractors of engine power => 37kW but < 75kW, for agricultural use
8701.93.50 Other tractors of engine power => 37kW but < 75kW, not for agricultural use
8701.94.10 Other tractors of engine power => 75kW but < 130kW, for agricultural use
8701.94.50 Other tractors of engine power => 75kW but < 130kW, not for agricultural use
8701.95.10 Other tractors of engine power >130kW, for agricultural use
8701.95.50 Other tractors of engine power >130kW, not for agricultural use
A 25% wholesale price increase is large. At the typical retail 50% margin (which may well be a better margin than farm implement dealers operate with) a 25% increase in cost of goods is 12.5% of the selling price. Not many businesses run a 12.5% profit margin. Especially considering that importers of chinese implements and tractors are generally small companies. Few would be willing to risk a tiny or negative profit for long. So I do not expect sellers of chinese made implements or tractors to hold their prices.