how to amend clay soil

{"cid":"91224240","title":"100% Natural Granular Humic Acid Extract Seed Germination Promotes Strong Plant Growth","imgUrl":"https:\/\/img.chinax.com\/nimg\/ef\/15\/dfc23796afd2fe4172912631774a-200x200-1.jpg","attrs":{"Brand Name":"Huayuan","Model Number":"Humic Acid Granular","Certification":"ISO9001","Place of Origin":"Shanxi","Payment Terms":"L\/C,T\/T","Supply Ability":"50 Ton\/Day","Packaging Details":"10KG, 25KG package, or 1 ton package and customer designated packing is available.","Recommended Dosage for Fruit Trees":"750-1500 kg\/ha","Recommended Dosage for Vegetables":"450-900 kg\/ha","Recommended Dosage for Grain Crops":"300-600 kg\/ha","Solubility":"Insoluble In Water","Use":"Base fertilizer, top dressing, and soil improvement in agricultural production","Particle Size":"2-4mm","HS":"38249999","Total Humic acids content (As dry basis)\/%":"70% (Type I), 60% (Type II), 50% (Type III), 40% (Type IV)"}}