Term

Definition
LAI required to intercept 95% of incident light 


Term
how to calculate % dry matter (% DM) 

Definition
Percent DM = 100%  moisture % 


Term
how to calculate Estimated Digestible Dry Matter (DDM) 

Definition
Estimated Digestible Dry Matter = 88.9 – [0.779 x ADF(%)] 


Term
how to calculate Estimated Dry Matter Intake (DMI) 

Definition
Estimated Dry Matter Intake = 120 / NDF (%) 


Term

Definition
NFE = 100 –(CP + EE + CF + Ash + Moisture)
When crude protein, fat, water, ash, and fiber are added and the sum is subtracted from 100, the difference is NFE. 


Term
how to calculate dietary cationanion difference (DCAD) 

Definition
DCAD, meq/100 grams of DM = [(%Na/.023) + (%K/.039)] – [(%Cl/.0355) + (%S/.016)] 


Term
how to calculate digestible dry matter (DDM) 

Definition
DDM% = 88.9 – (ADF% x 0.779) 


Term
how to calculate digestion coeffecient of a nutrient 

Definition
Digestion coefficient of a nutrient = 100  (100 * ((% Indicator in feed * % Nutrient in feces) / (% Indicator in feces * % Nutrient in feed))) 


Term
how to calculate digestion coeffecient of dry matter 

Definition
Digestion coefficient of dry matter = 100  (100 * (% Indicator in feed DM / % Indicator in fecal DM)) 


Term
how to calculate dry matter digestibility 

Definition
(kg dry matter intake  kg fecal dry matter)/(kg dry matter intake) 


Term
how to calculate dry matter intake (DMI) 

Definition
DMI (% of body weight) = 120/NDF% 


Term
how to calculate feed value 

Definition
Feed value = nutritive value * physical aspects of the forage 


Term
how to calculate nitrogen balance 

Definition
(N in the food consumed)  (N in feces)  (N in urine)
(nitrogen retention.) 


Term
how to calculate nonfiber carbohydrates (NFC) 

Definition
NFC% = 100%  [%NDF + %CP + %fat + %ash] 


Term
how to calculate nutrient digestibility 

Definition
nutrient digestibility (%) = ((nutrient intake  nutrient in feces) / (nutrient intake)) * 100 


Term
how to calculate protein equivalent 

Definition
protein equivalent (%) = 6.25 * % protein 


Term
how to calculate relative feed value (RFV) 

Definition
RFV% = DDM (%) x DMI (% of body weight)/ 1.29
Relative Feed Value (RFV) = (DDM x DMI) / 1.29 


Term
how to calculate the digestibility of a nutrient in the test feed stuff being fed in form of mixed feed 

Definition
Digestibility of nutrient in test feed (%) = ((A) (B) (C) X 100)/(D)
A = Digestibility of nutrient in total diet B = Digestibility of nutrient in basal diet (usually already determined when fed alone C = proportion of total nutrient in diet supplied by basal diet D = proportion of total nutrient in diet supplied by test feed. 


Term
how to calculate yield of a grass forage 

Definition
Tiller Density x Weight = Yield 


Term
how to estimate Net energy of lactation (Mcal/lb) (NE_{L}) 

Definition
NE_{L} = 1.50  (ADF% x 0.0267) 


Term

Definition
ratio of leaf area to land area 


Term
how to calculate growing degree days (GDD) 

Definition
GDD = ((Tempmax + Tempmin)/ 2)  32 


Term

Definition
In vitro dry matter digestibility 


Term
NDF basically measures... 

Definition
total cell wall content in the plant 


Term

Definition


Term
how to calculate Nutrients Needed in Supplement 

Definition
Animal Nutrient Requirements  Nutrients Supplied by Forage = Nutrients Needed in Supplement 


Term
how to calculate forage cost 

Definition
forage cost = (total cost / forage yield) 


Term

Definition


Term

Definition
animal units per acre over all acres and a period of time 


Term

Definition


Term

Definition
animals per acre at any one point in time 


Term

Definition


Term
how to calculate available acres 

Definition
available acres = (paddock size) x (# of paddocks) 


Term
how to calculate paddock size 

Definition
paddock size = (animal weight x %DMI x Head x Days in paddock) / (available forage_{diff} x grazing efficiency %) 


Term
how to calculate number of paddocks 

Definition
(days of rest) / (days in paddock) + 1 

