N. Organic Fertilizer Likely Refers To:

• Organic Nitrogen Fertilizer: Since “N” is the symbol for Nitrogen, N.organic fertilizer most likely refers to a fertilizer that provides nitrogen to plants but is derived from organic sources.

Organic Nitrogen Sources in Fertilizers:

• Compost: A rich source of organic nitrogen and other nutrients, compost improves soil structure and moisture retention.  
• Manure: Animal manure (cow, chicken, horse) can be a valuable source of organic nitrogen, but needs to be aged or composted first to avoid pathogens.  
• Plant-based materials: Examples include legume cover crops, alfalfa meal, and feather meal.
• Treated sewage sludge: In some cases, treated sewage sludge can be used as an organic fertilizer source, although regulations and practices vary by location.

Benefits of N.organic Fertilizers:

• Sustainability: Derived from renewable resources, reducing reliance on non-renewable fertilizers.  
• Soil Health: Promote beneficial soil microbes, improve structure and water retention.
• Plant Health: Provides essential nitrogen for plant growth in a slow-release form.