rev. 8/21/96 FORMULAS FOR FEED AND FORAGE ANALYSIS CALCULATIONS Agricultural Service Laboratory Clemson University 1. DRY MATTER (%) AND MOISTURE (%) a. DM = (dry weight - tare weight)x100/(wet weight - tare weight) b. MOISTURE = 100 - DM 2. CRUDE PROTEIN (%) CP = N x 6.25 3. SOLUBLE PROTEIN (% of CP) SP = CP - (insoluble nitrogen x 6.25)x100/CP 4. BOUND PROTEIN (%) BP = ADFN x 6.25 5. ADJUSTED CRUDE PROTEIN (%) a. If ADFN < 14% of CP ACP = CP b. If ADFN > 14% and < 20% of CP ACP = CP - ((((BP / CP) x 100) - 7) / 100) x CP c. If ADFN > 20% of CP ACP = CP - BP 6. DIGESTIBLE PROTEIN (%) DP = (CP x 0.929) - 3.48 7. CRUDE FIBER (%) - (Feed codes listed at end) a. Forages FEED CODES: 51-65, 86 CF = (ADF x 0.75) + 3.56 b. Grains and Grain-based feeds FEED CODES: 67-78, 80, 92, 93, 96, 98, 99 CF = ADF x 0.80 c. Total Mixed Rations FEED CODES: 81-85 CF = (ADF x 0.9667) - 3.80 8. TOTAL DIGESTIBLE NUTRIENTS (%) AND NET ENERGY OF LACTATION (Mcal/lb) (Feed codes listed at end) (CLEMSON) a. Grass FEED CODES: 51, 52, 53, 56, 58, 65 TDN = 81.38 + (CP x 0.36) - (ADF x 0.77) NEL = ((TDN x 0.0245) - 0.12) x 0.454 (CLEMSON) b. Legume FEED CODES: 54, 63 TDN = 83.088 + (CP x 0.0353) - (ADF x 0.788) NEL = ((TDN x 0.0245) - 0.12) x 0.454 (CLEMSON) c. Sorghum FEED CODES: 55, 62 TDN = 83.33 - (ADF x 0.795) NEL = ((TDN x 0.0245) - 0.12) x 0.454 (CLEMSON) d. Sorghum Grain FEED CODES: 69, 77 TDN = 87.10 - (ADF x 0.848) NEL = ((TDN x 0.0245) - 0.12) x 0.454 (PENN ST) e. Small Grain FEED CODES: 57, 64, 67, 72, 73, 74, 75 TDN = 4.898 + (NEL x 89.796) NEL = 0.9265 - (ADF x 0.00793) (CLEMSON) f. Corn Silage FEED CODES: 61, 86 TDN = 85.65 + (CP x 0.362) - (ADF x 0.825) NEL = ((TDN x 0.0245) - 0.12) x 0.454 (DHIA - NY) g. Ear Corn FEED CODE: 60 TDN = 99.72 - (1.927 x ADF) NEL = 0.94 - (ADF x 0.80 / 100) (DHIA - NY) h. Shell Corn FEED CODES: 68, 71 TDN = 92.22 - (ADF x 1.535) NEL = 0.94 - (ADF x 0.80 / 100) (CLEMSON) i. Grains and Dry Feeds FEED CODES: 70, 76, 92, 93, 96 TDN = 93.59 - (ADF x 0.936) NEL = ((TDN x 0.0245) - 0.12) x 0.454 (CLEMSON) j. Total Mixed Ration - Grass FEED CODE: 85 TDN = 88.96 + (CP x 0.36) - (ADF x 0.996) NEL = ((TDN x 0.0245) - 0.12) x 0.454 (CLEMSON) k. Total Mixed Ration - Legume FEED CODE: 83 TDN = 90.82 + (CP x 0.0353) - (ADF x 1.01) NEL = ((TDN x 0.0245) - 0.12) x 0.454 (CLEMSON) l. Total Mixed Ration - Sorghum FEED CODE: 82 TDN = 91.13 - (ADF x 1.02) NEL = ((TDN x 0.0245) - 0.12) x 0.454 (PENN ST) m. Total Mixed Ration - Small Grain FEED CODE: 84 TDN = 93.53 - (ADF x 1.03) NEL = ((TDN x 0.0245) - 0.12) x 0.454 (CLEMSON) n. Total Mixed Ration - Corn FEED CODE: 81 TDN = 93.75 + (CP x 0.362) - (ADF x 1.06) NEL = ((TDN x 0.0245) - 0.12) x 0.454 9. NET ENERGY OF MAINTENANCE (Mcal/lb) NEM = ((0.029 x TDN) - 0.29) x 0.454 10. NET ENERGY OF GAIN (Mcal/lb) NEG = ((0.029 x TDN) - 1.01) x 0.454 11. METABOLIZABLE ENERGY (kcal/lb) ME = (TDN x 0.2004)(96 - (0.202 x CP)) 12. TOTAL DIGESTIBLE NUTRIENTS (%) IF FAT IS GREATER THAN 4% TDNFAT = TDN((100 - (FAT - 4)) / 100) + (((FAT - 4) / 100) x 177) 13. NET ENERGY OF LACTATION (Mcal/lb) IF FAT IS GREATER THAN 4% NELFAT = NEL((100- (FAT - 4)) / 100) + (((FAT - 4) / 100) x 2.65) 14. NET ENERGY OF MAINTENANCE (Mcal/lb) IF FAT IS GREATER THAN 4% NEMFAT = NEM((100 - (FAT - 4)) / 100) + (((FAT - 4) / 100) x 2.65) 15. NET ENERGY OF GAIN (Mcal/lb) IF FAT IS GREATER THAN 4% NEGFAT = NEG((100 - (FAT - 4)) / 100) + (((FAT - 4) / 100) x 2.65 16. METABOLIZABLE ENERGY (kcal/lb) IF FAT IS GREATER THAN 4% MEFAT = ME((100 - (FAT - 4)) / 100) + (((FAT - 4) / 100) x 3473.1) 17. RELATIVE FEED VALUE FOR FORAGES RFV = (88.9 - (0.779 x ADF)) x (120 / NDF) / 1.29 18. NONFIBER CARBOHYDRATES (%) NFC = 100 - (CP% + FAT% + NDF% + ASH%) FOR POULTRY (Calculated on an As-Sampled Basis) 19. NITROGEN FREE EXTRACT (%) NFE = 100 - (NDF + CP + ASH + FAT + MOISTURE) 20. METABOLIZABLE ENERGY (kcal/lb) ME = (0.044 x CP + 0.087 x FAT + 0.04 x NFE) x 454 ANIMAL CODES 01 Dairy Cattle 25 Swine-Birth to 10 lbs 11 Beef Cattle 26 Swine-11-20 lbs 19 Swine-Lactating and Gestating Sows 27 Swine-21-45 lbs 20 Swine-Birth to 45 lbs 28 Swine-Multiple Category 21 Swine-Lactating Sows 29 Swine-Unspecified 22 Swine-Gestating Sows 31 Horses 23 Swine-Market Hogs 45-125 lbs 41 Poultry 24 Swine-Market Hogs 125+ lbs 49 Other FEED CODES HAYS TOTAL MIXED RATIONS OTHER 51 Hay Bermuda 81 Mixed Ration-Corn 92 Complete Feed 52 Hay Bahia 82 Mixed Ration-Sorghum 93 Soybean Meal 53 Hay Fescue 83 Mixed Ration-Legume 96 Cottonseed Meal 54 Hay Legume 84 Mixed Ration-Sm Grain 55 Hay Sorghum 85 Mixed Ration-Grass 56 Hay Mixed 57 Hay Small Grain 58 Pasture Grass SILAGES GRAINS OTHER-(No TDN&Energies) 60 Earlage 67 High Moisture Barley 66 Gluten 61 Silage Corn 68 High Moisture Corn 78 Bran 62 Silage Sorghum 69 High Moisture Milo 79 Hominy 63 Silage Legume 70 Grain Wheat 80 Distillers Grain 64 Silage Small Grain 71 Grain Corn 94 Mineral Mix 65 Silage Grass 72 Grain Oats 95 Cottonseed-Whole 86 Silage Tropical Corn 73 Grain Triticale 97 Soybean-Whole 74 Grain Barley 98 Cottonseed Hulls 75 Grain Rye 99 Soybean Hulls 76 Grain Mixed 91 Other 77 Grain Sorghum