南非采购需求：水溶性单磷酸氢钙、水溶性过磷酸钙、过磷酸钙肥料、水溶性磷肥、水溶性单磷酸氢钙、水溶性过磷酸钙

I'm looking to clarify the differences between Fulvic Acid and Humic Acid, particularly in terms of their effectiveness in enhancing fertilizer uptake and promoting root growth. It would be great to understand which of these two options is generally regarded as superior for this purpose. Additionally, I'd like to know at what point in a blueberry's annual cycle it would be most beneficial to incorporate either of these acids into a fertilization strategy. Insights into timing and application methods would be helpful for optimizing plant health and yield. Thanks for your input!