how to make liquid nitrogen fertilizer

{"cid":"91191488","title":"Water Soluble Organic Fertilizer Fish Protein Hydrolysate With Nitrogen NPK 15-1-1","imgUrl":"https:\/\/img.chinax.com\/nimg\/17\/9e\/24cd27d3fcd2e4768933d3c8a6ae-200x200-1.jpg","attrs":{"Price":"USD 640-USD 3500","Brand Name":"AOHE","Model Number":"15-1-1","Minimum Order Quantity":"1ton","Delivery Time":"7-10 days","Certification":"ISO,SGS,","Place of Origin":"Sichuan, China (Mainland)","Payment Terms":"L\/C, T\/T","Supply Ability":"1000TON PER MONTH","Packaging Details":"1Kg,5Kg,10Kg,20Kg\/Bag (Kraft bag outside and plastic bag inside)","Purity":"100%","Release type":"Controlled","Application":"Fertilizer","State":"Powder","name":"Organic Fertilizer fish protein hydrolysate","npk":"15-1-1"}}

{"cid":"91200154","title":"Chlorine-Free Vegetal Origin Organic Fertilizer for Sustainable and Nutritious Agriculture","imgUrl":"https:\/\/img.chinax.com\/nimg\/ca\/d8\/dded2f70f052aa9b1a1f6f54741c-200x200-1.jpg","attrs":{"Brand Name":"Shi hong","Model Number":"Ca+Mg liquid","Minimum Order Quantity":"1 ton","Delivery Time":"3~7days, depending on order time","Place of Origin":"China","Payment Terms":"T\/T, L\/C","Supply Ability":"1000 tons per month","Packaging Details":"1L\/bottle, 10L\/bottle ,200L\/drum,1000L\/drum. flexi tank or as customers' requests.","Certification":"SGS","pH":"4-6","Application":"Agriculture","FAQ":"Brand name: Shihong, Model number: 65072-01-7, Made in: China, Packaged in: Drum, Payment terms: T\/T and L\/C, Supply: 300 tons per month","Packaging":"200L\/IBC 1000L\/DRUM","Product Category":"Amino Acid Liquid Fertilizer","Classification":"Organic Fertilizer","Main functions":"Chelate soil nutrients, stimulate root growth, steady crop growth, improve fertilizer utilization, improve photosynthetic performance, improve crop quality, improve micro-domain environment, resist soil-borne diseases, increase nutrient synergistic effect,","Total nitrogen":"\u22658%"}}