Use Wood Lactation Curve when you need to predict daily milk yield with the Wood gamma lactation curve over days in milk. Enter Scale constant a, Ramp coefficient b, Decay coefficient c, and Days in milk using the definitions and units below so the result can be reproduced.

Scale constant a

A finite measured or assumed value.

Ramp coefficient b

A finite measured or assumed value from 0 through 1.

Decay coefficient c

A finite measured or assumed value.

Days in milk

An integer count or setting greater than or equal to 1.

The published tool contract uses this rule: Predict daily milk yield with the Wood gamma lactation curve over days in milk.

Predicted daily milk kg

The calculated predicted daily milk kg in kg/day.

The calculation does not propagate measurement uncertainty, sampling error, or biological and chemical variability. Ramp coefficient b must remain between 0 and 1.

Retain the original Scale constant a, Ramp coefficient b, Decay coefficient c, and Days in milk values and their units alongside the result. Stem Wood Density is useful when you instead need to compute stem wood density in grams per cubic centimetre as oven-dry stem mass divided by stem volume. Wood Density provides another view by helping you compute basic wood density in grams per cubic centimetre as oven-dry mass divided by fresh volume.

• Stem Wood Density

  Compute stem wood density in grams per cubic centimetre as oven-dry stem mass divided by stem volume.

• Wood Density

  Compute basic wood density in grams per cubic centimetre as oven-dry mass divided by fresh volume.

• Ray Proportion Percent

  Compute the wood ray proportion in percent as the ray pixel area divided by the total cross-section pixel area times one hundred.