Subsurface drainage effects on soil penetration resistance and water table depth on a clay soil in the Red River of the North Valley, USA

Agriculture & Biology

• subsurface drainage 100%
• soil penetration resistance 92%
• water table 78%
• clay soils 74%
• valleys 58%
• rivers 50%
• resistance to penetration 40%
• hydraulic structures 34%
• fallow 33%
• soil 32%
• crop yield 28%
• soybeans 23%
• wheat 20%
• trafficability 18%
• tile drainage 17%
• growing season 17%
• silty clay soils 17%
• high water table 16%
• penetrometers 14%
• agricultural machinery and equipment 13%
• carrying capacity 12%
• flooded conditions 12%
• managers 10%
• Glycine max 9%
• rhizosphere 9%
• Triticum aestivum 9%
• experimental design 8%
• rain 8%
• farmers 7%
• cultivars 6%
• crops 5%
• water 4%

Engineering & Materials Science

• Drainage 68%
• Rivers 63%
• Clay 62%
• Soils 50%
• Water 34%
• Agricultural machinery 9%
• Tile 7%
• Rain 6%
• Load limits 6%
• Design of experiments 5%
• Managers 5%