Cover crops help conserve which nutrient in the soil?

Cover crops help conserve which nutrient in the soil?

• A. Potash
• B. CO2
• C. Nitrogen
• D. Heat

Answer: (C)

Cover crops conserve nitrogen in the soil by capturing and holding onto it during times when the main crop isn’t growing. They take up available soil nitrogen as they grow, which reduces how much can be lost through leaching with rain or snowmelt. When the cover crop is terminated and incorporated, its residues break down and release nitrogen slowly for the next crop. If the cover crop is a legume, it hosts nitrogen-fixing bacteria that convert atmospheric nitrogen into forms plants can use, effectively adding new nitrogen to the soil. Even non-legume cover crops help by protecting the soil surface, reducing erosion, and scavenging residual nitrogen that might otherwise leach away. This makes nitrogen the nutrient most closely associated with cover crops, while potassium is not the primary nutrient being conserved, and CO2 or heat aren’t nutrients.

Cover crops conserve nitrogen in the soil by capturing and holding onto it during times when the main crop isn’t growing. They take up available soil nitrogen as they grow, which reduces how much can be lost through leaching with rain or snowmelt. When the cover crop is terminated and incorporated, its residues break down and release nitrogen slowly for the next crop. If the cover crop is a legume, it hosts nitrogen-fixing bacteria that convert atmospheric nitrogen into forms plants can use, effectively adding new nitrogen to the soil. Even non-legume cover crops help by protecting the soil surface, reducing erosion, and scavenging residual nitrogen that might otherwise leach away. This makes nitrogen the nutrient most closely associated with cover crops, while potassium is not the primary nutrient being conserved, and CO2 or heat aren’t nutrients.