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Numerical Method for Optimizing Soil Distribution Using DEM Simulation and Empirical Validation by Chemical Properties

Seokho Kang, Yonggik Kim, Hyunggyu Park, JinHo Son, Yujin Han, YeongSu Kim, Seungmin Woo, Seunggwi Kwon, Youngyoon Jang and Yushin Ha ()
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Seokho Kang: Department of Bio-Industrial Mechanical Engineering, College of Agriculture and Life Sciences, Kyungpook National University, Daehak-ro 80, Buk-gu, Daegu 41566, North Gyeongsang, Republic of Korea
Yonggik Kim: Department of Bio-Industrial Mechanical Engineering, College of Agriculture and Life Sciences, Kyungpook National University, Daehak-ro 80, Buk-gu, Daegu 41566, North Gyeongsang, Republic of Korea
Hyunggyu Park: Department of Bio-Industrial Mechanical Engineering, College of Agriculture and Life Sciences, Kyungpook National University, Daehak-ro 80, Buk-gu, Daegu 41566, North Gyeongsang, Republic of Korea
JinHo Son: Department of Bio-Industrial Mechanical Engineering, College of Agriculture and Life Sciences, Kyungpook National University, Daehak-ro 80, Buk-gu, Daegu 41566, North Gyeongsang, Republic of Korea
Yujin Han: Department of Bio-Industrial Mechanical Engineering, College of Agriculture and Life Sciences, Kyungpook National University, Daehak-ro 80, Buk-gu, Daegu 41566, North Gyeongsang, Republic of Korea
YeongSu Kim: Upland-Field Machinery Research Center, Kyungpook National University, Daehak-ro 80, Buk-gu, Daegu 41566, North Gyeongsang, Republic of Korea
Seungmin Woo: Upland-Field Machinery Research Center, Kyungpook National University, Daehak-ro 80, Buk-gu, Daegu 41566, North Gyeongsang, Republic of Korea
Seunggwi Kwon: Bulls Co., Ltd., Seungju-gun 40053, Gyeongsangbuk-do, Republic of Korea
Youngyoon Jang: Sungboo Co., Ltd., Chilgok-gun 39909, Gyeongsangbuk-do, Republic of Korea
Yushin Ha: Upland-Field Machinery Research Center, Kyungpook National University, Daehak-ro 80, Buk-gu, Daegu 41566, North Gyeongsang, Republic of Korea

Agriculture, 2024, vol. 14, issue 8, 1-20

Abstract: Manure distribution in soil creates a ground environment that is conducive to crop cultivation. However, the lumping and concentration of manure in the field can occur, hindering the fertilization of the soil for plant growth, and the randomization of nutrients under different soil depths accelerates it. To overcome the challenges associated with agricultural testing, such as high cost, inclement weather, and other constraints, computational analysis is often used. In this study, rotary operations are performed using the discrete element method (DEM) to ensure the uniform distribution of manure and four soil layers. DEM analysis was conducted with three experimental factors, and simulation sets were designed using the Box-Behnken central combination method. The DEM results were evaluated using the uniformity index (UI), and the field test of the rotary operation was performed with the set showing the most uniform distribution among the results. Due to undistinguishable particles in reality, the uniformity was validated by a comparison of the chemical characteristics of the L 1 and L 5 in terms of before and after the rotary operation. The DEM parameter of the soil was determined by performing field measurements at different soil depths (0–20 cm), and this parameter was calibrated by conducting a penetration test. The Box–Behnken central combination method was implemented using the following factors: tillage depth (X 1 ), PTO revolution speed (X 2 ), and forward machine velocity (X 3 ). These factors were obtained using the UI regression model and the response surface method. In the results, it was indicated that the UI was affected by the factors in the following order: X 1 > X 2 > X 3 . The optimized factor values were X 1 = 25 cm, X 2 = 800 RPM, and X 3 = 1.8 km/h, leading to a UI of 6.07, which was consistent with the analysis results. The operating parameters were maintained throughout the field test, and the acquired data were input into the measurement system. The lowest UI value of 6.07 had the strongest effect on decreasing the disparity between L 1 and L 5 , especially in terms of pH, organic matter, P, Ca, and Mg. In summary, the results indicated that soil distribution can be controlled by adjusting mechanical parameters to ensure uniform chemical characteristics across various soil depths.

Keywords: discrete element method; rotary operation; response surface method; soil distribution; uniformity index (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2024
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