Summary
ABSTRACT To facilitate sustainable agriculture in the acidic soil in the southern region of China, reducing inorganic fertiliser in combination with an alkaline humic acid fertiliser amendment (HAFA) was investigated on key physicochemical properties of acid growth media and cherry tomato growth. Five treatments were established: 100% rate of the local conventional inorganic fertiliser, reduced application of inorganic fertiliser (30, 50, and 70% inorganic fertiliser application, w/w) combined with HAFA, and an unfertilised treatment as the control. HAFA increased medium pH by 0.39–0.75 compared with the 100% inorganic fertiliser treatment. In addition, medium organic matter and acid phosphatase, invertase, and polyphenol oxidase activity increased significantly following amendment. In add
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