4 DISCUSSION 4.1 Achene and oil yield of HO sunflowers 4.1.1 Influence of environment and location 4.1.2 Influence of genotype 4.1.3 Fungal diseases and their influence 4.1.4 Fungicide application 4.2 Alternative agricultural approaches 4.2.1 The plant activator BTH (BION ® ) 4.2.2 Ammonium based liquid fertilization 4.2.3 Combination of BION ® and Ammonium Fertilization 4.2.4 Mikro-Vital
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