'enter, frvice Question: Every now and again, I receive a call from a dairy producer who is upset that his DHIA butterfat test and his payment test are not the same. This morning such a call came in and I would like to show a piece of research that might help answer this question. Butterfat test can vary greatly from day to day in individual cows. To illustrate this I include this chart from North Carolina State University. We see wide variation in a five-day period as noted by cow #266 that tested a range ot 1.7 to 5.95% butterfat. The average cow in this study actually varied fat test across the tive-day period by 1.74% and one cow tested 3.8% differently from one miking to the other Many factors can influence the 4 T* . Ere «* uswc ' Agriculture - Residential - Commercial Buildings • Basement • Floors Retaining Walls • Footer NRCS Approved Tank Designs CALL FOR FREE ESTIMATES CONTACT AND SEE HOW AFFORDABLE ROY SENSENIG CONCRETE WALLS CAN BE 717-355-0726 E) O E 11 CONCRETE IT nil E U E WALLS, INC. irk, PA 16802 University day-to-day variation in fat test. The day and time of sampling as seen above can certainly play a role. Environmental stresses such as heat and humidity can also alter fat test very quickly. Disease pressure has an impact on fat test and usually is coupled alSng with large changes in milk volume. Excitement associated with activities outside the normal day to-day life of the cows can influence fat test. Foot trimming, rectal palpations, or simple changing groups or pastures might cause large fat variation. Nutritional changes can affect fat test and should be done as gradual as possible. Allow yourself to wonder a bit about the large change in a cow when she pastures at night and then is fed a TMR during the day. Milking equipment, like any other, will wear as time goes by. When DISIA milk meters are added temporarily to the system, vacuum levels often become inadequate thus compromising both the ability to properly milk the cow as well as the functionality of the meter itself. As you can see, there are many opportunities for milk fat test variation. These should point out the impracticably of comparing test results from DHIA and the Slatted Pit For Free Stall Barn 601 Overly Grove Rd.. New Holland, PA 17557 Cow Is£\ 180 <» ** 224' '23o' * 236 5 238 251 258 265. 266 267 289 291 305 316 Aves. 3.44 processing plant. Often times we are not comparing the same milk, DHIA usually measures one milking or one day and then is only part of a multiple milking pickup. Dean Amick (Director of Field Services) will suggest this when tank and DHIA butterfat B For All Your Concrete Walls And Construction Needs Mon. Tucs. Tues. Wed. Wed. Thu. Thu. Fri. Fri, p.m. a.m. p.m. * a.m. p.m. a.m. p.m. a.m. p.m. avgs. Low High 2.60 2.50 3.35 2.90 3.90 3.15 3.00 2.60 2.20 2.91 2.20 3.90 2.20 2.75 2.95 1.35 3.80 2.30 1.95 1.60 3.50 2.49 1.35 3.80 3.80 3.90 3. 2.35 4.70 -^JU 2.45 * 3.50 ' 2. 3.50 3.25 3.15 3.65 3.40 3.60 3.60 3.49 3.15 3.30 4.00 4.10 3.25 3.25 2.90 3.60 2.70 3.05 3.27 2.70 3.40 3.20 _ 2.W ' I' 45 , | 2-20 2.20 3.80 3.00 3.40, 3.80, 5.50 2.70 . i j 3.65 1.70 3.00 3.80 3.80 3.90 4.20 3.75 3.20 2.50 3.65 3.50 3.95 3.70 3.40 3.60 3.49 YOUR FULL LINE KUBOTA PRODUCT HEADQUARTERS • INVENTORY • PRICE • KNOWLEDGEABLE SALES STAFF » SERVICE EXPERIENCE 2.85 4.10 5.95 4.90 2.00 2.65 3.59 1.70 3.25 3.50 '!-2.SS ' v 3.60 * ; 2.70 : V.20 ?3.28 f 2>o* J 4.25 3.95 4.05 2.70 3.40 3.30 3.30 2.90 4.50 3.10 3.80 3.45 3.60 2.80 3.95 3.20 3.60 3.20 3.30 3.05 3.23 3.60 3.35 3.58 2.86 test are severely different. Pull one tank sample after proper agitation and then divide into three equal portions while keeping the milk stirred. Send one to your dairy processor, one to the DHIA lab, and the other to an KILLER BRCS. • PARTS •SALES • SERVICE^ m We Ship Parts UPS TRACTORS & EQUIPMENT- LEBANON MONDAY - FRIDAY 8:00 - 5:00 SATURDAY 8:00 -12:00 Rt. #7, Box 40S, Lebanon, PA 17042 Rt. 419 1 Mile West Of Schaefferstown 717-949-2000 or Toll Free 877-4Kubota <458-26821 Visit our web site at www.kubotaparts.com • E-mail us at kubola@nbn.net 3.90 3.79 2.70 3.55 3.34 2.50 3.95 3.63 2.80 3.30 3.37 3.05 3.49 3.36 independent lab. This should answer some questions about testing procedures, herd management, or sampling technique used by the hauler. Remember as you proceed, the high test is not always the correct one. II ■ 0 T P *frftk»i^LAsO Serving Central PA Since 1921 'ILOTS! KELLER BROS. AIRPORT 2550 RUNWAY 600' From Dealershi Cow Range Range 3.49 2.40 4.00 mfJMM V 3.05 2.45 ' 150 4.00 4.10 4.65 >9;80 5.95 ' iso 4.20 4.50 3.95 3.70 Financing Or Cash Discounts Available Call For Details On Leasing LANCASTER 1950 FrultvHle Pike, Lancaster, PA 17601 At Route 30 & Fruitvllle Pike 717-569-2500 or Toll Free 877-3KUBOTA (368-26821
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