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INTRODUCTION

The National Bovine Data Centre (NBDC) collates the completed lactation results recorded in the United Kingdom from a range of ICAR approved organisations (see “Sources”). The results used for the performance statistics in this section are gathered exclusively for animals registered with the appropriate dairy cattle breed society.

 

COMMENTARY

Throughout the period 2015 to late 2017, many UK dairy farms experienced a period of depressed milk prices below the long-term average (source: AHDB UK, GB & NI Farmgate Prices). This did not encourage producers to manage for higher lactation milk yields. From late 2017 and into 2018 however farmgate process improved closer to the 5-year average. The impact of this across most breeds can be seen in the charts for annual average lactation yields. Where during 2015-2017 yields stagnated or even declined slightly. While over the 2018 production year yields have improved by around 1-2% for most major UK breeds.

Over the same periods, by contrast, overall health and fertility measures have shown consistent improvements. Particularly lactation average Somatic Cell Counts (SCC) and overall Calving Intervals. Most herds and breeds have produced year on year improvement in those two key measures. Except perhaps where a relatively small population size means some temporary reversals are apparent among a generally improving longer term trend. Influenced by a relatively small number of animals within those populations.

Particularly among the Holstein-Friesian and Ayrshire populations, which collectively account for over 95% of the data collected for these results, the sustained improvements in Calving Intervals (as a measure of fertility) are most marked. These are visible in the charts for annual trends in Calving Interval in the following sections. In all three population sectors Calving Intervals have improved from peaks around 2008-2009 to levels approaching 400 days, last seen around the turn of the millennium. Geneticists and pundits agree that these trends are at least in part, influenced by the introduction of daughter fertility indices into to the overall genetic index scores produced for breeding bulls. Which have made it increasingly difficult for a bull transmitting poor daughter fertility to achieve a top overall score. Along with the efforts of breeders and genetic source suppliers to eliminate bulls with poor daughter fertility from their studs.

 

Lactation Criteria

To be selected for inclusion in these analyses, lactation records must meet selected qualifying criteria.
Each lactation must:

  • Have a minimum of 5 genuine sample test results, analysed for constituents.
  • Have lasted a minimum of 200 days from calving,
  • Have ended the lactation or completed the 305th day within the 12 months up to 30th September of the year quoted.
  • Include production up to and including the 305th day of lactation, but not beyond.
  • Excluding animals culled prematurely (e.g. for reasons of disease control) where the lactation was ended when the animal was recorded as moved directly for slaughter below 250 days.
  • Only those lactations with a valid Cell Count result are included in the SCC aggregates.
  • Calving Intervals are included in averages where the period between successive pairs of calving dates falls into the range 280 to 730 days. This excludes very premature calvings where the event has started a fresh lactation record and animals with extended intervals due to embryo transfer activity.

 

SOURCES

The lactation data held by NBDC includes results recorded in the UK by the organisations listed below. Each of these organisations perform milk recording to the guidelines and standards defined by the International Committee for Animal Recording (ICAR).

 

The Cattle Information Service

National Milk Records Plc

Dale Farm Ltd

Isle of Man Dept. of Agriculture

Royal Jersey Agriculture & Horticulture Society

Production Trends Ayrshires (AYR)

The breed specific results,shown here, include data from breed society registered animals (both fully and supplementary) giving confidence that the statistics shown are representative of the breed. Breed results are listed in bold type in tables and thick lines on charts.

The change over time reveals how much of the progress is due to improved genetic potential, nutrition and management practices. The number of Lactations show how many full qualifying lactations were completed during the year and used in the analysis of Milk, Fat & Protein results. Calving interval (CI) and Somatic Cell Count (SCC) statistics will use slightly fewer results. The count does not equate to the number of animals registered, nor include those who may have ended their lactation below 200 days. It does however give a consistent guide to the trend in lactations recorded.

Lactation Production of Registered Animals (all ages)

Year ended Sep No. of Lactations#(AYR) Milk Yield (kg) Fat % Protein % Fat Yield (kg) Protein Yield (kg) SCC ('000 cells/ml) Calving Interval (days)
2006 10766 6832 4.07 3.30 278 226 212 415
2007 12872 6873 4.06 3.32 279 228 213 415
2008 12937 6913 4.10 3.33 283 230 204 419
2009 12854 6844 4.09 3.35 280 229 208 416
2010 12112 6944 4.11 3.32 285 230 196 418
2011 12880 7107 4.09 3.31 291 236 185 415
2012 13919 7040 4.11 3.29 289 231 196 415
2013 12893 6829 4.14 3.29 282 225 207 416
2014 12851 7037 4.10 3.31 288 233 204 416
2015 13168 6940 4.06 3.33 282 231 190 414
2016 12858 6897 4.12 3.34 284 230 176 411
2017 11894 6828 4.14 3.33 283 227 175 406
2018 11583 6923 4.15 3.32 288 230 167 404
2019 11263 7066 4.14 3.33 293 235 166 405
2020 10783 7150 4.19 3.35 300 240 168 404

# Derived from animals completing a 305-day Lactiation Period. Minimum of 200 days and 5 full tests. Registered animals only.

Breed Performance Standards

(Production level required to meet the top n% of breed. Derived from LP/305-day lactations completed 2020)

Percentile Milk (kg) Fat % Protein % Fat (kg) Protein (kg) F+P (kg) C Interval
1% 11847 5.49 3.89 504 384 873 312
2% 11235 5.30 3.82 475 369 831 318
5% 10301 5.05 3.72 434 340 768 328
10% 9526 4.84 3.63 400 316 712 337
25% 8266 4.50 3.49 347 276 621 356

Values have been derived independently for each trait, so should be read and treated separately. For example, an individual cow who falls into (say) the top 25% for one trait (such as Milk Yield), may be at a very different level for another trait (such as Fat %, Protein % or Calving Interval).

Performance trends

for all registered animals

Year200620072008200920102011201220132014201520162017201820192020%3.23.33.43.53.63.73.83.944.14.2Kg01000200030004000500060007000Fat%Protein%Milk Yield (kg)

Somatic Cell Count

Lactation Averages

Year200620072008200920102011201220132014201520162017201820192020'000 cells/ml160165170175180185190195200205210215AyrshireNational/All Breeds Average

Calving Interval

annual trend

Year200620072008200920102011201220132014201520162017201820192020Calving Interval (days)400405410415420425430AyrshireNational/All Breeds Average

 

Parity Group Production Ayrshires (AYR)

Parity group results are derived from all eligible lactation data within each age group.These show how first lactation heifers measure up against more mature animals, along with the relative performance of 7th, 8th and later lactation animals.These results may be particularly useful to those Farmers and Herd Owners wishing to benchmark their herd against the breed contemporaries.

The ‘Change between lactations’ column in the table below shows the increase (if positive) or decrease (if negative) in Milk Yield, between successive lactations. This indicates how much more (or less) milk might be expected from each of the different age groups in a herd and acts as a very broad guide to the effects of maturity. Individual animals may of course vary considerably from this pattern as they age themselves.

Performance of Registered Animals (Parity Groups - 2020)

Parity Lactation Count#(AYR) Milk Yield (kg) Change between lactations Fat % Protein % Fat Yield (kg) Protein Yield (kg) SCC ('000 cells/ml) Calving Interval (days)
1 3021 6267   4.27 3.37 268 211 114  
2 2434 7173 14 % 4.21 3.38 302 243 131 406
3 1831 7654 6 % 4.16 3.34 319 256 172 397
4 1301 7702 0 % 4.17 3.33 321 256 208 399
5 912 7735 0 % 4.13 3.32 319 257 257 404
6 566 7636 -1 % 4.15 3.32 317 253 283 404
7 342 7494 -1 % 4.05 3.31 304 248 339 417
8 191 7477 0 % 4.06 3.31 304 247 345 418
9 104 7166 -4 % 4.07 3.27 292 234 294 428
10+ 77 6750 -5 % 4.05 3.28 273 221 250 424

# Derived from animals completing a lactation period (305-days) within the year from October to Seprtember. Minimum 200 days and 5 full tests.

Lactation Milk Yields

Parity/Lactation Age12345678910+kg0100020003000400050006000700080002020

Somatic Cell Count

Parity/Lactation Age12345678910+'000 cells/ml0501001502002503003502020

Calving Interval

(days since previous calving)

Parity/Lactation Age12345678910+days0501001502002503003504004502020

Lactation Fat & Protein (kg)

Parity/Lactation Age12345678910+kg050100150200250300350Fat 2018Fat 2019Fat 2020Protein 2018Protein 2019Protein 2020

Lactation Fat & Protein (%)

Parity/Lactation Age12345678910+%00.511.522.533.544.5Fat 2018Fat 2019Fat 2020Protein 2018Protein 2019Protein 2020

 

 

Production Trends British Friesian (BFR)

The breed specific results,shown here, include data from breed society registered animals (both fully and supplementary) giving confidence that the statistics shown are representative of the breed. Breed results are listed in bold type in tables and thick lines on charts.

The change over time reveals how much of the progress is due to improved genetic potential, nutrition and management practices.The number of Lactations show how many full qualifying lactations were completed during the year and used in the analysis of Milk, Fat & Protein results.Calving interval (CI) and Somatic Cell Count (SCC) statistics will use slightly fewer results.The count does not equate to the number of animals registered, nor include those who may have ended their lactation below 200 days. It does however give a consistent guide to the trend in lactations recorded.

Lactation Production of Registered Animals (all ages)

Year ended Sep No. of Lactations#(FRI) Milk Yield (kg) Fat % Protein % Fat Yield (kg) Protein Yield (kg) SCC ('000 cells/ml) Calving Interval (days)
2006 5534 6820 4.12 3.31 281 226 201 405
2007 6827 6761 4.09 3.34 277 226 195 402
2008 6037 6818 4.09 3.36 279 229 190 406
2009 5869 6775 4.09 3.35 277 227 185 405
2010 5372 6822 4.10 3.33 280 227 188 401
2011 5411 6965 4.07 3.33 283 232 184 401
2012 5688 6926 4.10 3.31 284 229 183 402
2013 6111 6642 4.13 3.30 274 219 188 399
2014 6545 6966 4.08 3.34 284 233 163 396
2015 6936 6889 4.06 3.36 280 232 164 394
2016 7509 6977 4.11 3.37 287 235 164 393
2017 7787 6815 4.16 3.33 283 227 154 392
2018 7978 6783 4.18 3.33 283 226 155 389
2019 8086 6777 4.14 3.37 281 228 153 389
2020 8293 6850 4.19 3.38 287 232 163 389

# Derived from animals completing a 305-day Lactiation Period. Minimum of 200 days and 5 full tests. Registered animals only.

Breed Performance Standards

(Production level required to meet the top n% of breed. Derived from LP/305-day lactations completed 2020)

Percentile Milk (kg) Fat % Protein % Fat (kg) Protein (kg) F+P (kg) C Interval
1% 11081 5.42 3.97 478 375 839 308
2% 10537 5.25 3.89 448 355 795 314
5% 9696 5.00 3.77 414 326 735 323
10% 9009 4.79 3.68 386 305 686 332
25% 7972 4.50 3.54 337 270 607 349

Values have been derived independently for each trait, so should be read and treated separately. For example, an individual cow who falls into (say) the top 25% for one trait (such as Milk Yield), may be at a very different level for another trait (such as Fat %, Protein % or Calving Interval).

Performance trends

for all registered animals

Year200620072008200920102011201220132014201520162017201820192020%3.33.43.53.63.73.83.944.14.2Kg01000200030004000500060007000Fat%Protein%Milk Yield (kg)

Somatic Cell Count

Lactation Averages

Year200620072008200920102011201220132014201520162017201820192020'000 cells/ml150155160165170175180185190195200205210British FriesianNational/All Breeds Average

Calving Interval

annual trend

Year200620072008200920102011201220132014201520162017201820192020Calving Interval (days)385390395400405410415420425430British FriesianNational/All Breeds Average

 

Parity Group Production British Friesian (BFR)

Parity group results are derived from all eligible lactation data within each age group.These show how first lactation heifers measure up against more mature animals, along with the relative performance of 7th, 8th and later lactation animals.These results may be particularly useful to those Farmers and Herd Owners wishing to benchmark their herd against the breed contemporaries.

The ‘Change between lactations’ column in the table below shows the increase (if positive) or decrease (if negative) in Milk Yield, between successive lactations. This indicates how much more (or less) milk might be expected from each of the different age groups in a herd and acts as a very broad guide to the effects of maturity. Individual animals may of course vary considerably from this pattern as they age themselves.

Performance of Registered Animals (Parity Groups - 2020)

Parity Lactation Count#(FRI) Milk Yield (kg) Change between lactations Fat % Protein % Fat Yield (kg) Protein Yield (kg) SCC ('000 cells/ml) Calving Interval (days)
1 2128 5709   4.25 3.37 243 192 108  
2 1768 6816 19 % 4.23 3.43 288 234 110 389
3 1429 7208 5 % 4.20 3.40 303 245 143 385
4 1090 7541 4 % 4.17 3.38 315 255 206 386
5 724 7585 0 % 4.15 3.37 315 256 211 386
6 484 7617 0 % 4.09 3.34 312 255 262 390
7 308 7516 -1 % 4.11 3.32 309 250 340 396
8 178 7356 -2 % 4.13 3.31 304 243 363 401
9 119 7098 -3 % 4.10 3.32 291 235 362 392
10+ 63 6751 -4 % 4.21 3.34 284 226 598 405

# Derived from animals completing a lactation period (305-days) within the year from October to Seprtember. Minimum 200 days and 5 full tests.

Lactation Milk Yields

Parity/Lactation Age12345678910+kg0100020003000400050006000700080002020

Somatic Cell Count

Parity/Lactation Age12345678910+'000 cells/ml0501001502002503003504004505005506006502020

Calving Interval

(days since previous calving)

Loading Calving Interval...
 
 
 
 
 
 
 
 
 
 
 
 

Lactation Fat & Protein (kg)

Loading Lactation Fat & Protein (kg)...
 
 
 
 
 
 
 
 
 
 
 
 

Lactation Fat & Protein (%)

Parity/Lactation Age12345678910+%00.511.522.533.544.5Fat 2018Fat 2019Fat 2020Protein 2018Protein 2019Protein 2020

 

Genetic TREND FOR PLI

The genetic trend for the population shows the mean PLI of females per year of birth, plotted alongside the mean PLI of their sires, weighted by daughter numbers. The PLI was calculated in the latest year shown and applied to all animals dated back to the year 2000. This allows an objective comparison across time for all animals in the data set.

Genetic Trend – PLI

Mean PLI of females by year of birth, with mean PLI of their sires *

Year of Birth200620072008200920102011201220132014201520162017201820192020PLI (£)-100-50050100150FemalesSires

PLI results are based on the latest evaluations from AHDB.
* Sires PLI averages weighted according to the number of daughters

 

Production Trends Brown Swiss (BSW)

The breed specific results,shown here, include data from breed society registered animals (both fully and supplementary) giving confidence that the statistics shown are representative of the breed. Breed results are listed in bold type in tables and thick lines on charts.

The change over time reveals how much of the progress is due to improved genetic potential, nutrition and management practices.The number of Lactations show how many full qualifying lactations were completed during the year and used in the analysis of Milk, Fat & Protein results.Calving interval (CI) and Somatic Cell Count (SCC) statistics will use slightly fewer results.The count does not equate to the number of animals registered, nor include those who may have ended their lactation below 200 days. It does however give a consistent guide to the trend in lactations recorded.

Lactation Production of Registered Animals (all ages)

Year ended Sep No. of Lactations#(BSW) Milk Yield (kg) Fat % Protein % Fat Yield (kg) Protein Yield (kg) SCC ('000 cells/ml) Calving Interval (days)
2006 844 7833 4.01 3.31 314 259 190 420
2007 1097 7851 4.01 3.32 315 261 206 419
2008 1180 7475 4.11 3.43 307 256 171 431
2009 1378 7387 4.05 3.45 299 255 174 421
2010 1618 7380 4.10 3.41 303 252 147 422
2011 1766 7519 4.15 3.40 312 255 158 418
2012 2056 7427 4.18 3.38 310 251 149 420
2013 2133 7137 4.17 3.38 298 241 174 418
2014 2161 7331 4.11 3.42 301 251 183 423
2015 2264 7261 4.06 3.45 295 250 189 425
2016 2302 7333 4.12 3.44 302 253 188 417
2017 2083 7257 4.10 3.43 297 249 187 417
2018 1845 7499 4.04 3.44 303 258 194 412
2019 1824 7544 3.99 3.45 301 261 167 419
2020 1917 7496 4.12 3.47 308 260 177 416

# Derived from animals completing a 305-day Lactiation Period. Minimum of 200 days and 5 full tests. Registered animals only.

Breed Performance Standards

(Production level required to meet the top n% of breed. Derived from LP/305-day lactations completed 2020)

Percentile Milk (kg) Fat % Protein % Fat (kg) Protein (kg) F+P (kg) C Interval
1% 12154 5.47 4.01 512 420 912 318
2% 11479 5.29 3.97 490 394 870 324
5% 10677 5.00 3.87 446 362 797 330
10% 9984 4.80 3.78 409 340 742 338
25% 8622 4.49 3.63 360 300 656 359

Values have been derived independently for each trait, so should be read and treated separately. For example, an individual cow who falls into (say) the top 25% for one trait (such as Milk Yield), may be at a very different level for another trait (such as Fat %, Protein % or Calving Interval).

Performance trends

for all registered animals

Year200620072008200920102011201220132014201520162017201820192020%3.33.43.53.63.73.83.944.14.2Kg010002000300040005000600070008000Fat%Protein%Milk Yield (kg)

Somatic Cell Count

Lactation Averages

Year200620072008200920102011201220132014201520162017201820192020'000 cells/ml150160170180190200210Brown SwissNational/All Breeds Average

Calving Interval

annual trend

Year200620072008200920102011201220132014201520162017201820192020Calving Interval (days)400405410415420425430Brown SwissNational/All Breeds Average

 

Parity Group Production Brown Swiss (BSW)

Parity group results are derived from all eligible lactation data within each age group.These show how first lactation heifers measure up against more mature animals, along with the relative performance of 7th, 8th and later lactation animals.These results may be particularly useful to those Farmers and Herd Owners wishing to benchmark their herd against the breed contemporaries.

The ‘Change between lactations’ column in the table below shows the increase (if positive) or decrease (if negative) in Milk Yield, between successive lactations. This indicates how much more (or less) milk might be expected from each of the different age groups in a herd and acts as a very broad guide to the effects of maturity. Individual animals may of course vary considerably from this pattern as they age themselves.

Performance of Registered Animals (Parity Groups - 2020)

Parity Lactation Count#(BSW) Milk Yield (kg) Change between lactations Fat % Protein % Fat Yield (kg) Protein Yield (kg) SCC ('000 cells/ml) Calving Interval (days)
1 437 6390   4.13 3.46 264 221 83  
2 362 7635 19 % 4.10 3.50 313 267 162 416
3 286 7913 3 % 4.15 3.49 328 277 166 411
4 291 7989 0 % 4.11 3.46 329 277 206 418
5 232 8139 1 % 4.10 3.46 334 282 237 418
6 136 7940 -2 % 4.10 3.44 325 273 337 414
7 88 7434 -6 % 4.13 3.43 307 255 264 410
8 56 7158 -3 % 4.17 3.44 299 246 276 414
9 16 6796 -5 % 3.89 3.50 265 238 239 422
10+ 12 7184 5 % 3.96 3.41 284 245 162 485

# Derived from animals completing a lactation period (305-days) within the year from October to Seprtember. Minimum 200 days and 5 full tests.

Lactation Milk Yields

Parity/Lactation Age12345678910+kg0100020003000400050006000700080002020

Somatic Cell Count

Parity/Lactation Age12345678910+'000 cells/ml0501001502002503003502020

Calving Interval

(days since previous calving)

Parity/Lactation Age12345678910+days0501001502002503003504004505002020

Lactation Fat & Protein (kg)

Parity/Lactation Age12345678910+kg050100150200250300350Fat 2018Fat 2019Fat 2020Protein 2018Protein 2019Protein 2020

Lactation Fat & Protein (%)

Parity/Lactation Age12345678910+%00.511.522.533.544.5Fat 2018Fat 2019Fat 2020Protein 2018Protein 2019Protein 2020

 

Genetic TREND FOR PLI

The genetic trend for the population shows the mean PLI of females per year of birth, plotted alongside the mean PLI of their sires, weighted by daughter numbers. The PLI was calculated in the latest year shown and applied to all animals dated back to the year 2000. This allows an objective comparison across time for all animals in the data set.

Genetic Trend – PLI

Mean PLI of females by year of birth, with mean PLI of their sires *

Year of Birth200620072008200920102011201220132014201520162017201820192020PLI (£)-140-120-100-80-60-40-20020406080100120FemalesSires

Production Trends Guernsey (GUE)

The breed specific results,shown here, include data from breed society registered animals (both fully and supplementary) giving confidence that the statistics shown are representative of the breed. Breed results are listed in bold type in tables and thick lines on charts.

The change over time reveals how much of the progress is due to improved genetic potential, nutrition and management practices.The number of Lactations show how many full qualifying lactations were completed during the year and used in the analysis of Milk, Fat & Protein results.Calving interval (CI) and Somatic Cell Count (SCC) statistics will use slightly fewer results.The count does not equate to the number of animals registered, nor include those who may have ended their lactation below 200 days. It does however give a consistent guide to the trend in lactations recorded.

Lactation Production of Registered Animals (all ages)

Year ended Sep No. of Lactations#(GUE) Milk Yield (kg) Fat % Protein % Fat Yield (kg) Protein Yield (kg) SCC ('000 cells/ml) Calving Interval (days)
2006 2992 5598 4.62 3.52 259 197 182 417
2007 3372 5603 4.62 3.56 259 199 174 417
2008 3877 5693 4.66 3.57 265 203 189 425
2009 3201 5689 4.64 3.57 264 203 177 428
2010 2745 5927 4.71 3.61 279 210 184 420
2011 2793 5949 4.67 3.54 278 210 189 422
2012 2896 6013 4.72 3.52 284 212 180 422
2013 2853 5824 4.81 3.54 280 206 210 422
2014 2934 5884 4.81 3.57 283 210 190 419
2015 2799 5866 4.76 3.61 279 212 193 418
2016 2662 5770 4.79 3.59 277 207 209 415
2017 2420 5615 4.78 3.56 268 200 195 411
2018 2336 5625 4.80 3.55 270 200 186 415
2019 2093 5830 4.76 3.55 277 207 204 414
2020 1995 5831 4.88 3.58 285 209 178 415

# Derived from animals completing a 305-day Lactiation Period. Minimum of 200 days and 5 full tests. Registered animals only.

Breed Performance Standards

(Production level required to meet the top n% of breed. Derived from LP/305-day lactations completed 2020)

Percentile Milk (kg) Fat % Protein % Fat (kg) Protein (kg) F+P (kg) C Interval
1% 9594 6.58 4.22 470 330 785 320
2% 9075 6.25 4.13 444 317 755 325
5% 8452 5.92 4.01 413 296 706 333
10% 7795 5.67 3.91 384 278 656 341
25% 6814 5.26 3.75 336 245 578 360

Values have been derived independently for each trait, so should be read and treated separately. For example, an individual cow who falls into (say) the top 25% for one trait (such as Milk Yield), may be at a very different level for another trait (such as Fat %, Protein % or Calving Interval).

Performance trends

for all registered animals

Year200620072008200920102011201220132014201520162017201820192020%3.43.63.844.24.44.64.85Kg0500100015002000250030003500400045005000550060006500Fat%Protein%Milk Yield (kg)

Somatic Cell Count

Lactation Averages

Year200620072008200920102011201220132014201520162017201820192020'000 cells/ml160165170175180185190195200205210GuernseyNational/All Breeds Average

Calving Interval

annual trend

Year200620072008200920102011201220132014201520162017201820192020Calving Interval (days)400405410415420425430GuernseyNational/All Breeds Average

 

Parity Group Production Guernsey (GUE)

Parity group results are derived from all eligible lactation data within each age group.These show how first lactation heifers measure up against more mature animals, along with the relative performance of 7th, 8th and later lactation animals.These results may be particularly useful to those Farmers and Herd Owners wishing to benchmark their herd against the breed contemporaries.

The ‘Change between lactations’ column in the table below shows the increase (if positive) or decrease (if negative) in Milk Yield, between successive lactations. This indicates how much more (or less) milk might be expected from each of the different age groups in a herd and acts as a very broad guide to the effects of maturity. Individual animals may of course vary considerably from this pattern as they age themselves.

Performance of Registered Animals (Parity Groups - 2020)

Parity Lactation Count#(GUE) Milk Yield (kg) Change between lactations Fat % Protein % Fat Yield (kg) Protein Yield (kg) SCC ('000 cells/ml) Calving Interval (days)
1 544 5041   4.87 3.50 245 176 139  
2 428 5725 13 % 5.00 3.62 287 207 134 410
3 360 6413 12 % 4.84 3.60 311 231 172 408
4 260 6309 -1 % 4.94 3.61 312 228 238 423
5 181 6363 0 % 4.86 3.60 309 229 202 416
6 94 6281 -1 % 4.72 3.53 297 222 217 436
7 73 5988 -4 % 4.74 3.58 284 214 254 417
8 30 5910 -1 % 4.66 3.64 275 215 347 411
9 14 5718 -3 % 4.80 3.55 275 203 628 402
10+ 11 4805 -15 % 4.42 3.46 212 166 271 431

# Derived from animals completing a lactation period (305-days) within the year from October to Seprtember. Minimum 200 days and 5 full tests.

Lactation Milk Yields

Parity/Lactation Age12345678910+kg010002000300040005000600070002020

Somatic Cell Count

Parity/Lactation Age12345678910+'000 cells/ml01002003004005006002020

Calving Interval

(days since previous calving)

Parity/Lactation Age12345678910+days0501001502002503003504004502020

Lactation Fat & Protein (kg)

Parity/Lactation Age123456