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In this video, students will learn about the two major types of weathering: mechanical and chemical. These forces alter the shape and composition of rocks. Students will also explore the different types of soils, soil properties, and soil profiles. Other topics covered include oxidation, soil formation, soil texture, horizons, leaching, subsoil, soil conservation, and groundwater.
(Source: DCMP)
Researchers at New York University are tackling one of the major challenges in agriculture. They are trying to raise healthy plants while minimizing the use of fertilizer and the leaching of fertilizer chemicals into the environment. A team led by scientist Gloria Coruzzi and computer scientist Dennis Shasha is using the latest tools to develop new plant varieties that don't need as much nitrogen to grow. The researchers are also investigating which of the plant's genes control fertilizer uptake. Part of the "Science Nation" series.
