When fresh pasture becomes scarce—due to seasonal changes, drought, or winter—livestock farmers require a reliable backup to ensure animal health and productivity. Hay remains the oldest and most widely used form of conserved fodder globally. Valued for its simplicity and effectiveness, hay making involves cutting green forage, reducing its moisture content, and storing it safely for lean seasons. Mastering this process is essential for maintaining nutritional quality and preventing spoilage.
What is Hay and Why Does It Matter?
Hay consists of grass, legumes, or other herbaceous plants that have been harvested and dried specifically for animal feed. It serves as a critical nutritional safety net when grazing is unavailable or when livestock are housed indoors. Technically, hay production involves preserving forage under aerobic, low-moisture conditions. The primary goal is to lower moisture content to 18% or below. This reduction halts plant respiration, effectively “locking in” protein, energy, and digestibility, allowing the forage to provide sustained nutrition months after harvest.
Understanding the Different Types of Hay
The nutritional profile of your hay depends entirely on the crop used. Producers generally categorize hay into three main groups:
- Grass Hay: The most common variety, including species like timothy, orchard grass, bermudagrass, and fescue. It typically provides 6–10% crude protein, making it an excellent energy source and roughage for mature cattle, horses, and sheep.
- Legume Hay: Crops like alfalfa and clover are significantly richer in protein (16–18%) and calcium. Because they are more nutrient-dense, they are ideal for young, growing animals, lactating cows, and high-production dairy herds.
- Cereal Grain Hay: Crops like oats and barley can be harvested for hay if cut while still leafy. They must be harvested early to retain value and prevent the risk of nitrate accumulation.
The Hay Making Process: A Step-by-Step Guide
Successfully transforming green forage into high-quality hay requires precision across five key stages:
1. Harvesting at the Right Stage
Timing is the most critical factor. Grasses should be cut at the pre-flowering stage, while legumes like lucerne are best harvested at the onset of flowering. Harvesting early may result in a slightly lower volume, but the superior nutritional density more than compensates for the reduced yield.
2. Wilting
Immediately after cutting, the forage enters the wilting phase. The target is to reduce moisture to roughly 40–50%. Spreading the material uniformly ensures maximum sun exposure and airflow. Using specialized conditioner equipment to crimp or crush stems can significantly accelerate this process.
3. Field Drying (Curing)
During curing, moisture must drop to 15–20% for safe long-term storage. This typically requires 2–3 days of sunny, dry weather. Avoid over-drying, as this causes leaves—the most nutrient-rich part of the plant—to shatter and be lost in the field.
4. Raking and Turning
Raking consolidates the forage into windrows for easier collection. Turning the material periodically ensures even drying, but this must be done gently to minimize leaf loss, particularly in high-protein legume crops.
5. Baling
Once the target moisture level is reached, the hay is compacted into bales. Baling at moisture levels above 20% is dangerous, as it promotes microbial activity, leading to heat generation, rapid nutrient decline, and a severe risk of spontaneous combustion (fire).
Strategic Storage to Prevent Nutrient Loss
Field success can be quickly negated by improper storage. To maintain quality, follow these best practices:
- Moisture Verification: Always ensure hay is below 20% moisture before stacking.
- Prioritize Indoor Storage: Storing hay in a barn reduces dry matter losses by approximately two-thirds compared to outdoor storage.
- Prevent Ground Contact: Use pallets, gravel, or old tires to keep bales off the soil. This prevents “wicking,” where the bottom of the bale absorbs ground moisture and rots.
- Optimize Airflow: If storing outdoors, avoid pyramid stacking. Instead, store round bales end-to-end in single rows with at least 3 feet of space between rows to promote air circulation and limit moisture trapping.
- Use Protective Covers: In high-rainfall areas, tarps or net wrap are essential to prevent water-soluble nutrients from leaching out of the bales.
Overcoming Challenges in Hay Production
The biggest hurdle in hay making is weather dependency. Rain during the drying process leaches nutrients and delays harvest. In tropical regions where the rainy season overlaps with peak plant growth, farmers may need to invest in infrastructure like barn drying (using forced air) to mitigate risks. While these methods involve higher initial energy costs, they provide greater control over the final product’s quality.
By carefully monitoring local forecasts, harvesting at the optimal growth stage, and investing in proper storage infrastructure, farmers can ensure a consistent, high-quality feed supply. This proactive approach not only protects your investment but also ensures the health and productivity of your livestock throughout the year.
References
- Food and Agriculture Organization (FAO): Fodder Conservation Techniques.
- NC State Extension: Forage Conservation and Hay Production.
- University of Minnesota Extension: Preserving Value in Dry Stored Hay.