Hay Yield by Forage Type
Alfalfa is the highest-yielding perennial forage in most regions, producing 3-6 dry tons per acre per year across 3-5 cuttings. Under irrigation with good management, yields can reach 8 tons per acre. Alfalfa produces more protein per acre than any other crop — 1,200-1,800 pounds of crude protein per acre compared to 600-900 for grass hay. The trade-off is that alfalfa requires a soil pH above 6.5 and good drainage, and it persists for only 4-6 years before stand density declines to the point of needing rotation.
Grass hay species like orchardgrass, tall fescue, and bermudagrass produce 2-4 dry tons per acre per year. Warm-season grasses like bermudagrass outproduce cool-season grasses in the South, yielding 4-6 tons under good management. Mixed alfalfa-grass stands offer a compromise: 3-5 tons per acre with better winter survival and less lodging than pure alfalfa. For boosting yields with nutrients, use our fertilizer calculator to plan your forage fertility program.
Cutting Timing and Quality
Forage quality drops rapidly with maturity. Alfalfa cut at early bud stage tests 20-22% crude protein and 150+ relative feed value. Waiting just 10 days to full bloom drops protein to 14-16% and RFV to 100-120. The difference is worth $30-50 per ton in hay market value. First cutting is typically the highest yielding but lowest quality because it includes overwintered growth. Second and third cuttings are where the premium quality comes from.
The optimal cutting height for alfalfa is 2-3 inches. Cutting lower than 2 inches reduces regrowth energy stored in the crown and can reduce next-cutting yield by 10-15%. For grass hay, leave 4 inches of stubble to protect the growing point. After cutting, hay needs 3-4 days of dry weather to cure properly for small square bales at 15-18% moisture. Large round bales can be made at slightly higher moisture (18-20%) but risk spoilage if baled above 22%. For managing the field after cutting, our soil amendment calculator helps plan any needed soil corrections.
Hay Storage Losses and How to Minimize Them
Round bales stored outside on the ground lose 15-30% of their dry matter over a winter, primarily from the bottom 6-8 inches where moisture wicks up from the soil. Elevating bales on pallets, tires, or a gravel pad cuts losses to 8-12%. Wrapping round bales in plastic or storing them under a tarp reduces losses further to 5-8%. Indoor storage in a barn limits losses to 2-5%, which is why hay barns pay for themselves within 5-7 years for operations producing more than 500 tons annually.
Small square bales stored indoors retain 95-98% of their dry matter. The investment in a simple pole barn for hay storage returns 15-25% annually through reduced spoilage alone, not counting the premium that well-stored hay commands in the market. Wet hay also generates heat through microbial activity, which can lead to spontaneous combustion in extreme cases — any hay baled above 25% moisture should be monitored with a hay probe thermometer for the first 30 days.
Pricing Hay by Quality and Market
Hay prices vary dramatically by quality, type, and region. Premium alfalfa (RFV 180+) sells for $200-300 per ton in dairy markets. Good quality grass hay brings $100-160 per ton. Mixed hay falls in between at $130-200 per ton. During drought years, prices can double as supplies tighten. Transportation adds $0.15-0.25 per ton per mile, so local hay has a built-in price advantage over shipped hay beyond 100 miles.
Testing your hay through a forage lab costs $15-25 per sample and provides crude protein, TDN, RFV, and moisture content. This data lets you price your hay accurately and helps buyers formulate rations. Selling untested hay by the bale without quality data typically means leaving $20-40 per ton on the table compared to tested and classified hay. For livestock feed budgeting beyond just hay, our animal feed calculator covers complete ration planning.
Fertilizing Hay Stands for Maximum Production
Alfalfa removes approximately 15 pounds of phosphate and 50 pounds of potash per dry ton of forage harvested. A field yielding 5 tons per acre removes 75 pounds of P2O5 and 250 pounds of K2O annually — one of the highest nutrient removal rates of any crop. Potassium deficiency is the most common cause of alfalfa stand decline after year three. Applying 200-300 pounds of K2O per acre per year split between cuttings maintains stand productivity.
Grass hay needs 40-60 pounds of nitrogen per acre per cutting to maintain yield. Applying nitrogen immediately after each harvest maximizes regrowth rate. Sulfur is another commonly overlooked nutrient for hay — alfalfa needs 5 pounds of sulfur per ton of yield, and many soils in the eastern half of the US are now sulfur-deficient due to reduced atmospheric deposition. A soil test every 2-3 years is the only reliable way to track these removal rates. For pest management in hay fields, our pesticide calculator helps plan weed and insect control between cuttings.
Common Hay Production Mistakes
Cutting too late is the most expensive mistake in hay production. Every day past the optimal stage costs $3-5 per acre in feed value, and on a 100-acre hay operation, that is $300-500 per day of delayed cutting. Weather anxiety causes many producers to wait for a perfect forecast window that never comes, losing quality with each passing day. The solution is to cut when the forage is ready and use preservatives like propionic acid for hay baled at higher moisture if rain threatens.
Overlooking soil fertility is the second biggest error. Many producers fertilize their row crops and neglect the hay field, which silently loses 10-20% of its yield potential each year. By the time visible deficiency symptoms appear — stunting, discoloration, weed invasion — the stand has already lost significant tonnage. Soil test every hay field every two years and follow the recommendations. For improving soil structure to support better forage production, our compost calculator helps plan organic matter applications.