Beef feedlot manure is a valuable source of plant nutrients and organic matter, offering both short- and long-term benefits for soil health and crop production.
Why It Matters
Manure adds nitrogen (N), phosphorus (P), potassium (K), and sulphur (S) to the soil. While plants can use nutrients in mineral (inorganic) form right away, much of the nitrogen and phosphorus in manure is tied up in organic matter and released slowly over time through microbial activity.
When straw bedding is mixed with manure, about 90% of nitrogen and 50% of phosphorus remain unavailable in the first year. As a result, additional fertilizer may be needed in early years to meet crop demands.
Nutrient Release Over Time
Over four years, plant-available nutrient release from typical beef feedlot manure looks like this:
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Nitrogen: 25%
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Phosphorus: 70%
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Potassium: 90% (mostly in year one)
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Sulphur: 65%
Know What You’re Applying
Nutrient levels in manure vary due to diet, bedding, climate, and handling. To get accurate values, producers should test manure from individual pens over at least three years. Lab testing before application ensures correct nutrient planning.
Estimating Value
One ton of manure (50% moisture) contains usable nutrients worth noting. While potassium often makes up nearly half the total value, many Prairie soils already have adequate potassium levels. Removing potassium from the calculation still leaves a solid value from nitrogen, phosphorus, and sulphur.
Manure also adds organic matter and micronutrients, which improve soil structure, water retention, and long-term fertility. Trials suggest up to a 20% yield boost when manure is applied regularly at 30 tons/acre/year.
Application Costs
Spreading costs depend on factors like distance and equipment used. Moisture levels—ranging from 30% to 70%—influence nutrient concentration and hauling efficiency. On average, one 1,075-lb. animal produces a ton of manure every 67 days.
Bottom Line
With proper testing and planning, beef feedlot manure can replace synthetic fertilizers, boost yields, and improve soil health—making it a sustainable and cost-effective resource for crop producers.
