2. Fertilizer materials containing only one plant food element and recognized by their chemical names are not required to be guaranteed for the plant food element contained therein.
3. Unacidulated mineral phosphatic materials and basic slag must be guaranteed as to both total and available phosphoric acid, and the degree of fineness.
4. In the case of bone, tankage and other natural organic phosphate materials, only the total phosphoric acid is required to be guaranteed.
5. Additional plant food elements, determined by chemical methods, may be guaranteed only by permission of the Director. If any of those additional plant foods are claimed, they must be included in the guarantee, and are subject to inspection and analysis in accordance with the methods and regulations that may be prescribed by the Director.
6. The Director may permit or require the potential basicity or acidity, expressed in terms of calcium carbonate equivalent in multiples of 100 pounds per ton, to be registered and guaranteed.
2. Fertilizer materials containing only one plant food element and recognized by their chemical names are not required to be guaranteed for the plant food element contained therein.
3. Unacidulated mineral phosphatic materials and basic slag must be guaranteed as to both total and available phosphoric acid, and the degree of fineness.
4. In the case of bone, tankage and other natural organic phosphate materials, only the total phosphoric acid is required to be guaranteed.
5. Additional plant food elements, determined by chemical methods, may be guaranteed only by permission of the Director. If any of those additional plant foods are claimed, they must be included in the guarantee, and are subject to inspection and analysis in accordance with the methods and regulations that may be prescribed by the Director.
6. The Director may permit or require the potential basicity or acidity, expressed in terms of calcium carbonate equivalent in multiples of 100 pounds per ton, to be registered and guaranteed.
2. Fertilizer materials containing only one plant food element and recognized by their chemical names are not required to be guaranteed for the plant food element contained therein.
3. Unacidulated mineral phosphatic materials and basic slag must be guaranteed as to both total and available phosphoric acid, and the degree of fineness.
4. In the case of bone, tankage and other natural organic phosphate materials, only the total phosphoric acid is required to be guaranteed.
5. Additional plant food elements, determined by chemical methods, may be guaranteed only by permission of the Director. If any of those additional plant foods are claimed, they must be included in the guarantee, and are subject to inspection and analysis in accordance with the methods and regulations that may be prescribed by the Director.
6. The Director may permit or require the potential basicity or acidity, expressed in terms of calcium carbonate equivalent in multiples of 100 pounds per ton, to be registered and guaranteed.