How to compare peanut hull feed analyses

Start with the reporting basis

A peanut hull feed analysis is useful only when you know whether its nutrient values are reported as-fed or on a dry-matter basis. As-fed results describe the material in the condition tested, including its moisture. Dry-matter results remove the effect of water so nutrient concentrations can be compared on a common basis.

To convert an as-fed nutrient value to a dry-matter value, divide it by the dry-matter fraction. The dry-matter fraction is the proportion of the sample that is not moisture, expressed as a decimal. For example, a result reported on an as-fed basis must be adjusted using the sample’s dry-matter result before comparing it with a dry-matter figure from another analysis. The reverse comparison requires converting both figures to the same basis first.

A number without its basis can mislead: moisture dilutes the concentration of nutrients per unit of as-fed material. This does not mean the lot contains less total nutrient in the dry portion; it means the tested material includes a different amount of water. Compare values on one basis, and keep the original report’s labels with any figures carried into a formulation.

What moisture and dry matter tell you

Moisture and dry matter describe the sample’s composition and help explain why two analyses may show different nutrient concentrations. Moisture also matters when evaluating the amount of usable dry material represented by an as-fed quantity. For a bulk buyer, this distinction helps keep a delivered weight comparison separate from a nutrient-concentration comparison.

Check that moisture or dry matter is reported for the same sample as the nutrient results. If one sheet gives nutrients as-fed and another gives dry-matter values, do not compare the listed percentages directly. Also note whether the report identifies the sample and the lot it represents; results are only useful for a purchase decision when the sample is representative of the material being offered.

Read protein, fiber and energy together

Protein is one part of the nutrient profile, not a complete measure of feed value. When crude protein is listed, compare it on a consistent basis and interpret it alongside the rest of the ration and the intended use. Peanut hulls are a fibrous co-product, so fiber measures are especially relevant when assessing how the material fits into a feed formulation.

A report may include crude fiber or other fiber measures, such as neutral detergent fiber or acid detergent fiber. These measures are not interchangeable: each describes fiber using a different analytical approach. Use the same measure when comparing lots, and avoid treating a fiber result alone as a direct statement of digestibility or animal performance.

Energy values require particular care. A reported energy figure may be calculated or estimated using a specified method, and values based on different systems may not be directly comparable. Check whether energy is listed, how it was determined, and whether the reporting basis matches the other values. If it is not stated, do not assume that two energy numbers were derived in the same way.

Use fat and minerals as supporting detail

Fat helps round out the proximate analysis and can distinguish the composition reported for one sample from another. Its presence does not replace the need to review moisture, protein and fiber together. As with the other results, confirm whether fat is reported as-fed or on a dry-matter basis.

Mineral information can add useful context when the formulation calls for it. A report might list ash as a broad measure of inorganic material, individual minerals, or both; ash is not a substitute for a mineral profile. Compare individual mineral results only when the same minerals and reporting units appear on both reports, and verify the basis used for each.

Separate reference values from an offered-lot analysis

General reference values can help orient a formulation discussion, but they do not describe a particular peanut hull lot. An offered-lot analysis should identify the tested material and provide the reported values, units and basis. Where a buyer relies on a specific field—such as moisture, a fiber measure or a mineral result—make sure that field is included rather than inferred from a general table.

Before using an analysis to compare offers, check the sample description, sampling date if provided, reporting basis and analytical method where relevant. Ask how the sample was taken and whether it represents the lot being quoted. A clear, consistent set of results makes it easier for a nutritionist or feed formulator to assess the material without mistaking a difference in reporting for a difference in composition.

Once you know which fields and basis your formulation requires, use the peanut hulls ingredient page to continue sourcing discussions. State the required form, quantity and destination alongside the analysis details so the offered material and its results can be evaluated together.

Common questions.