The "Fertilizer Calculator - Xuân Nông" is a Chrome extension designed to assist users in calculating the necessary fertilizer amounts based on specific plant types and cultivated areas. This tool supports various crops, including rice, corn, wheat, potatoes, tomatoes, cucumbers, and more, facilitating precise fertilizer application tailored to different agricultural needs.

Users can input their farming area in square meters (m²) for accurate calculations. The extension also allows exporting results to a CSV file for easy storage and future reference. It retains a history of calculations directly in the browser, with an option to clear this history when needed. Overall, this extension is a valuable resource for farmers, agriculture students, and anyone interested in optimizing fertilizer use scientifically and efficiently.