Ressources Etiqueté: Calcium

3 correspondances trouvées (Affichage 1 - 3)

  1. Calcium Deficiency in Dairy Cows - Video

    Access Agriculture Training Video Calcium deficiency is common among high-yielding dairy cows. A calcium deficient cow does not eat much, is cold to touch, looks tired and is unable to stand up. She gives less milk. Untreated cows may die. To prevent calcium deficiency, do not dehorn your cows....
    Calcium Mineral Deficiencies Dairy Cattle Dairy cattle health

  2. Plant Nutrition Studies

    01/01/1971 It is the purpose of this booklet to suggest some ways of studying plants that may involve students more fully, especially in the design and development of elementary research suitable for school laboratories. Educational Products Division, LaMotte Chemical Products, Chestertown, MD 74 pages,...
    Plant Nutrition Nitrogen Iron Magnesium Potassium Content Phosphorus Calcium Sulfur Boron Zinc Copper Molybdenum Chlorine

  3. Les Sols Acides des Tropiques

    Ressource principale
    01/01/2002 L’acidification du sol est un processus naturel ayant d'importants effets sur la croissance des plantes. À mesure que le sol devient de plus en plus acide, particulièrement lorsque le pH descend en-dessous de 4,5, il est de plus en plus difficile de produire des cultures vivrières. Lorsque le pH...
    Soil Micronutrients Acidity Alkaline Nitrate Ammonium Fertilizer Lime Calcium Soil pH