D. A. Roland

Best Publications

• Performance of commercial laying hens fed various phosphorus levels, with and without supplemental phytase

  RW Gordon;DA Roland

  196
  Citations

• Effect of dietary energy on performance and egg composition of Bovans White and Dekalb White hens during phase I

  G. Wu;M. M. Bryant;R. A. Voitle;D. A. Roland

  154
  Citations

• Influence of large doses of ascorbic acid on performance, plasma calcium, bone characteristics, and eggshell quality in broilers and Leghorn hens.

  J. I. Orban;D. A. Roland;K. Cummins;R. T. Lovell

  112
  Citations

• Influence of supplemental microbial phytase on first cycle laying hens fed phosphorus-deficient diets from day one of age

  S Punna;DA Roland

  88
  Citations

• Influence of Dietary Phosphorus on Performance of Hy-Line W36 Hens

  S. S. Sohail;D. A. Roland

  81
  Citations

• The Influence of Various Calcium and Phosphoras Levels on Tibia Strength and Eggshell Quality of Pullets During Peak Production

  T. J. Frost;D. A. Roland

  78
  Citations

• Influence of Calcium and Environmental Temperature on Performance of First-Cycle (Phase 1) Commercial Leghorns

  D. A. Roland;M. M. Bryant;H. W. Rabon;J. Self

  78
  Citations

• The Ability of Hens to Maintain Calcium Deposition in the Egg Shell and Egg Yolk as the Hen Ages

  D. A. Roland;D. R. Sloan;R. H. Harms

  74
  Citations

• Influence of Vitamin D3, 1α-Hydroxyvitamin D3, and 1,25-Dihydroxyvitamin D3 on Eggshell Quality, Tibia Strength, and Various Production Parameters in Commercial Laying Hens

  T. J. Frost;D. A. Roland;G. G. Untawale

  72
  Citations

• Influence of Premolt Production on Postmolt Performance with Explanation for Improvement in Egg Production Due to Force Molting

  D. A. Roland;J. Brake

  71
  Citations

• Factors Influencing Bone Mineral Content, Density, Breaking Strength, and Ash as Response Criteria for Assessing Bone Quality in Chickens

  J. I. Orban;D. A. Roland;M. M. Bryant;J. C. Williams

  69
  Citations

• Influence of Dietary Calcium Level and Particle Size of Calcium Source on In Vivo Calcium Solubilization by Commercial Leghorns

  K. S. Rao;D. A. Roland

  68
  Citations

• Influence of Dietary Fat on Economic Returns of Commercial Leghorns

  S. S. Sohail;M. M. Bryant;D. A. Roland

  66
  Citations

• In Vivo Limestone Solubilization in Commercial Leghorns: Role of Dietary Calcium Level, Limestone Particle Size, In Vitro Limestone Solubility Rate, and the Calcium Status of the Hen

  K. S. Rao;D. A. Roland

  65
  Citations

• Calcium and its Relationship to Excess Feed Consumption, Body Weight, Egg Size, Fat Deposition, Shell Quality, and Fatty Liver Hemorrhagic Syndrome,

  D. A. Roland;M. Farmer;D. Marple

  64
  Citations

• Shell quality as influenced by zeolite with high ion-exchange capability.

  Unknown

  55
  Citations

• Effect of essential fatty acid deficiency and type of dietary fat supplementation on biotin-deficient chicks.

  David A. Roland;Hardy M. Edwards

  51
  Citations

• The Ability of Hens to Regulate Protein Intake When Offered A Choice of Diets Containing Different Levels of Protein

  Unknown

  47
  Citations

• The Effects of Various Dietary Phosphorus Levels on the Circadian Patterns of Plasma 1,25-Dihydroxycholecalciferol, Total Calcium, Ionized Calcium, and Phosphorus in Laying Hens

  T. J. Frost;D. A. Roland;D. N. Marple

  34
  Citations

• Research note: current methods used in determination and evaluation of tibia strength: a correlation study involving birds fed various levels of cholecalciferol.

  T. J. Frost;D. A. Roland

  29
  Citations

• Calcium Metabolism in Broiler Breeder Hens. 2. The Influence of the Time of Feeding on Calcium Status of the Digestive System and Eggshell Quality in Broiler Breeders

  M. Farmer;D. A. Roland;M. K. Eckman

  28
  Citations

• Influence of dietary calcium on bone calcium utilization

  M. Farmer;D. A. Roland;A. J. Clark

  27
  Citations

• Evidence for Absorption of Silicon and Aluminum by Hens Fed Sodium Zeolite A

  D. A. Roland;H. W. Rabon;K. S. Rao;R. C. Smith

  19
  Citations

• Calcium Metabolism in Broiler Breeder Hens: 1. Calcium Status of the Digestive Tract of Broiler Breeders Throughout a 24-Hour Period

  M. Farmer;D. A. Roland;J. Brake;M. K. Eckman

  19
  Citations