travismulthaupt.com Chapter 37 Plant Nutrition.

travismulthaupt.com Plant Growth-Around 350 B.C. FFor centuries, people have postulated about plant growth. FAristotle believed the soil provided the substance for plant growth. FFor centuries, people have postulated about plant growth. FAristotle believed the soil provided the substance for plant growth.

travismulthaupt.com Plant Growth-17th Century FJan Baptista van Helmont planted a willow tree in a pot that contained 90.9kg of soil and observed it for five years in a very controlled environment. FHe found that the plant weighed 76.8kg, but only 0.06 kg of soil had disappeared. FHe concluded plant mass came from the water. FJan Baptista van Helmont planted a willow tree in a pot that contained 90.9kg of soil and observed it for five years in a very controlled environment. FHe found that the plant weighed 76.8kg, but only 0.06 kg of soil had disappeared. FHe concluded plant mass came from the water.

travismulthaupt.com Plant Growth-18th Century FStephen Hales postulates that plants gain mass from the air.

travismulthaupt.com Plant Growth FIt is now known that plants: F1. Extract nutrients from the soil. F2. Water supplies much of the H and O atoms for the plant’s organic growth. F3. The bulk of the organic material comes form CO 2 in the air. FIt is now known that plants: F1. Extract nutrients from the soil. F2. Water supplies much of the H and O atoms for the plant’s organic growth. F3. The bulk of the organic material comes form CO 2 in the air.

travismulthaupt.com Plants FPlants contain numerous elements. FOnly the essential elements are required for growth. F17 are essential, 9 are required in large amounts: FC,H,O,N,P,S FMicronutrients are only required in very small amounts. FPlants contain numerous elements. FOnly the essential elements are required for growth. F17 are essential, 9 are required in large amounts: FC,H,O,N,P,S FMicronutrients are only required in very small amounts.