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Received: May 25, 2020 Accepted: June 22, 2020 Available online: June 30, 2020 Ex-mining land has low productivity due to poor soil quality. One way to improve the quality of the soil is by providing organic materials, soil microbes, and plants that are known to be adaptive, such as fragrant lemongrass. The study aimed to determine the effect of the use of manure and Trichoderma sp. in improving soil chemical properties on ex-mining land. This research was conducted in Nagari Pala Luar, Koto Tujuh District, Sijunjung, and the Soil Laboratory, Agriculture Faculty, Universitas Andalas. The design used was Randomized Block Design (RBD) with 5 treatments (A = control / without cow manure and Trichoderma, B = 144 g cow manure + 14.4 gr Trichoderma sp. / planting hole, C = 288 g cow manure + 28, 8 gr Trichoderma sp. / planting hole, D = 432 g cow manure + 43.2 gr Trichoderma sp. / planting hole, E = 576 g cow manure + 57.6 g Trichoderma sp. / planting hole) and 3 replications. The results showed the use of cow manure and Trichoderma sp. able to increase nutrient content and of fragrant lemongrass growth in ex-mining land by giving 432 g cow manure + 43.2 gr Trichoderma sp. / planting hole.

the journal of food and medicinal plants

Application of Cow Manure and Trichoderma sp. on Ex-mining Land to Improve Soil Chemical Properties and Fragrant Lemongrass (Cymbopogon nardus L.) Growth