كتب ذات صلة

The relation of the health of the host and other factors to infection of Apium graveoleus by Septoria appii

• Sun-scald of fruit trees : a type of winter injury
  المؤلفون: Mix, A. J.
• A study of selections for the size, shape and color of hens'' eggs
  المؤلفون: Benjamin, Earl W.
• A study, by the crop survey method of factors influencing the yield of potatoes
  المؤلفون: Hardenburg, E. V.