https://www.khanacademy.org/science/cambridge-o-level-chemistry-cie/x8bc8fb44369617ed:chemistry-of-the-environment/x8bc8fb44369617ed:fertilisers/v/crop-improving-strategies-pk 2025-12-18T18:40:53.641757593Z Crop Improving Strategies Crop Improving Strategies Khan Academy video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Crop Improving Strategies Crop Improving Strategies https://cdn.kastatic.org/ka-youtube-converted/g_e8NSFBFz8.mp4/g_e8NSFBFz8.mp4 268 Fertilisers https://www.khanacademy.org/science/biology/ecology/biogeochemical-cycles/v/nitrogen-cycle 2024-05-06T19:22:43.24334365Z The nitrogen cycle The nitrogen cycle is a crucial process that converts atmospheric nitrogen into a form that plants and other organisms can use. This process, known as nitrogen fixation, is primarily carried out by bacteria. Nitrogen is essential for life, forming a key component in amino acids, ATP, and DNA. The cycle also includes the return of nitrogen to the atmosphere through decomposition. Sal Khan video https://cdn.kastatic.org/googleusercontent/gQTO9JBwADmey2m_RcYCR_nTXRtFSeKzD8OmiRJn46LlNov4Q7sqsF2imvMCMS8i7OccArqSUWSxktBugc1seihb0g The nitrogen cycle The nitrogen cycle is a crucial process that converts atmospheric nitrogen into a form that plants and other organisms can use. This process, known as nitrogen fixation, is primarily carried out by bacteria. Nitrogen is essential for life, forming a key component in amino acids, ATP, and DNA. The cycle also includes the return of nitrogen to the atmosphere through decomposition. https://cdn.kastatic.org/ka-youtube-converted/DsCMYyQ0NWU.mp4/DsCMYyQ0NWU.mp4 345 Fertilisers https://www.khanacademy.org/science/biology/ecology/biogeochemical-cycles/a/the-nitrogen-cycle 2024-05-29T17:16:29.06533157Z The nitrogen cycle The key role of microbes in nitrogen fixation. How overuse of nitrogen-containing fertilizers can cause algal blooms. article https://www.khanacademy.org/science/ap-college-environmental-science/x0b0e430a38ebd23f:the-living-world-ecosystems-and-biodiversity/x0b0e430a38ebd23f:biogeochemical-cycles/a/ap-es-the-nitrogen-cycle 2022-09-07T01:03:50.067296221Z The nitrogen cycle Review your understanding of the nitrogen cycle in this free article aligned to AP standards. article https://www.khanacademy.org/science/cambridge-o-level-chemistry-cie/x8bc8fb44369617ed:chemistry-of-the-environment/x8bc8fb44369617ed:fertilisers/e/fertilizers-and-manures 2026-04-10T10:20:45.209111834Z Fertilizers and Manures Let's answer some questions Shankar R exercise https://www.khanacademy.org/science/cambridge-o-level-chemistry-cie/x8bc8fb44369617ed:chemistry-of-the-environment/x8bc8fb44369617ed:fertilisers/v/fertilizers-manures-pk 2025-12-18T16:50:45.096818701Z Fertilizers & manures Created by Khan Academy video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Fertilizers & manures Created by Khan Academy https://cdn.kastatic.org/ka-youtube-converted/rwEF9BIlXHI.mp4/rwEF9BIlXHI.mp4 321 Fertilisers