The invasive, ubiquitous, and nonpalatable forest weed "Eupatorium adenophorum" (locally named "Banmara"), also known as Ageratina adenophora (Spreng), was used as a feedstock for biochar production. Biochar (BC) was produced using a novel flame curtain soil pit Kon-Tiki kiln with a pyrolysis temperature ranging from 450-700 • C [22] (link). Sundried feedstock weighing 250 kg was used for biochar production. After a pyrolysis time of about 2 h, the biochar was snuffed with soil and kept overnight (12-18 h) before collection. Biochar yield was 20% of the dry feedstock (50 kg). Biochar produced from Eupatorium using Kon-Tiki was characterized by a high pH (10.4), organic carbon (70%), CEC (72 cmolc kg -1 ), and surface area (74.6 m 2 g -1 ) [23] (link). For the preparation of urine-enriched biochar (BU), 1 kg biochar was added in a bucket containing 5 L cattle urine (approximately 1:1 volume ratio of biochar and urine) and stirred thoroughly to prepare the urine-biochar slurry. The next day, the urine-enriched biochar slurry was collected and applied to the respective experimental plots.