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< 【 International Plant Cultivation and Parenting Skill Standard (Elementary)】II.Scientific Soil Testi
42. Types and Characteristics of Medium and Trace Elements+ 43. Scientific Application of Medium and Trace Element Fertilizers+ 44. Types and Characteristics of Compound Fertilizers+ 45. Scientific Application of Compound Fertilizers+

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46. Properties and Application of Common Compound Fertilizers+ 47. Qualitative Identification of Commonly Used Elemental Chemical Fertilizers+ 48. Scientific Application of Slow and Controlled Release Fertilizers+ 49. Scientific Application of New Water-soluble Fertilizers+ 50. Scientific Application of Other New Fertilizers+

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