Agriculture Daily Weight Gain

Retain signed paired animal weight changes normalized by actual observation days and pooled animal-day exposure; no growth, nutrition or health diagnosis from apparent weight change.

Description

Paired weight change can be negative as well as positive.

Paired weight change can be negative as well as positive. Unequal observation durations need exposure pooling rather than an unweighted average of daily rates.^[1]

Retain signed paired animal weight changes normalized by actual observation days and pooled animal-day exposure; no growth, nutrition or health diagnosis from apparent weight change.

When to use Agriculture Daily Weight Gain

Use this tool to retain signed paired animal weight changes normalized by actual observation days and pooled animal-day exposure; no growth, nutrition or health diagnosis from apparent weight change.

Prepare the field, crop, soil or material measurements for the intended period. Confirm units, dry/wet bases and supplied parameters; keep paired observations aligned.

How to use Agriculture Daily Weight Gain and understand its results

Prepare the field, crop, soil or material measurements for the intended period. Confirm units, dry/wet bases and supplied parameters; keep paired observations aligned.
Enter pairedInitialWeightsKg, pairedFinalWeightsKg, elapsedDays using the field table and calculation rules, then run the tool.
Read pairedDailyWeightGainsKgPerDay, exposurePooledWeightGainKgPerAnimalDay. The explanation below defines the units, signs, ordering and any flags or placeholder values.
If the tool reports an input issue, correct the values and run it again. Apply the stated assumptions when interpreting a successfully returned result.

Input field	Meaning	Value type; see rules below	Requirement
pairedInitialWeightsKg	Paired initial weights kg	list of number	Required
pairedFinalWeightsKg	Paired final weights kg	list of number	Required
elapsedDays	Elapsed days	list of number	Required

Pair positive initial and final kg with positive elapsed days. Return each signed daily gain and total signed change divided by summed animal-day exposure. Weight loss remains negative.

Paired lists must be nonempty and have equal lengths.

dailyGain_i = (final_i−initial_i)/days_i; pooled = ΣweightChange/ΣanimalDays

Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.

Output field	Meaning	Value type
pairedDailyWeightGainsKgPerDay	Paired daily weight gains kg per day	list of number
exposurePooledWeightGainKgPerAnimalDay	Exposure pooled weight gain kg per animal day	number

json

{
  "input": {
    "pairedInitialWeightsKg": [
      100,
      200
    ],
    "pairedFinalWeightsKg": [
      110,
      195
    ],
    "elapsedDays": [
      10,
      5
    ]
  },
  "output": {
    "pairedDailyWeightGainsKgPerDay": [
      1,
      -1
    ],
    "exposurePooledWeightGainKgPerAnimalDay": 0.3333333333333333
  }
}

Limitations and assumptions

Measurements must refer to matched animals and comparable weighing conditions. Apparent gain or loss does not diagnose growth, nutrition or health and includes any uncorrected gut-fill or hydration differences.

Numeric inputs must be finite. Follow the calculation-specific rules for overflow, underflow and exceptional cases. Numeric lists are limited to 100,000 entries; the rules above may require smaller limits. Missing required fields, extra fields, wrong value types and violations of the calculation rules are input errors.

Alternative or Complementary methods

Use Agriculture Milk Yield Per Cow: Normalize interval milk inventories by actual lactating cow-days, separating accepted and rejected milk; not an unweighted per-cow average or a production/health guarantee. For a complementary task, use Agriculture Egg Production Rate: Account gross/marketable observed egg inventory per actual hen-days with varying collection periods; hen-day production is eggs per hen-day×100, not a binomial egg probability or nutritional adequacy.

References

Agriculture Daily Weight Gain — tool.io

Similar or alternative tools

Agriculture Milk Yield Per Cow
Normalize interval milk inventories by actual lactating cow-days, separating accepted and rejected milk; not an unweighted per-cow average or a production/health guarantee.
Agriculture Egg Production Rate
Account gross/marketable observed egg inventory per actual hen-days with varying collection periods; hen-day production is eggs per hen-day×100, not a binomial egg probability or nutritional adequacy.