Balancing Crop Nutrients for Sustainable Agriculture

Strategic Insights -

Researchers at the Bangladesh Agricultural University have made a crucial discovery on the impact of nutrient balances in crop production. The study, conducted over two consecutive years, revealed that a 25% increase in nitrogen and potassium and a 25% reduction in phosphorus and sulfur, coupled with 30 cm crop residue addition, reduced excessive fertilization and negative environmental impacts. This breakthrough suggests that balancing nutrient input-output in crop fields is essential for sustainable production, preventing inadequate or excessive fertilization.

Key Takeaways:

  • The research measured nitrogen (N), phosphorus (P), potassium (K), and sulfur (S) input and output pathways for maize in Old Brahmaputra Floodplain soils over two consecutive years.
  • The study found that the addition of 30 cm crop residue with recommended dose (RD) fertilizer significantly improved the soil nutrient balance.
  • The nutrient balances exhibited significant positive relationships with the total nutrient contents in soils, indicating that positive nutrient balance enhanced nutrient buildup in soils.
  • Leaching was a significant pathway for nutrient loss from the soil, with losses ranging from 3-4% to 7-8% of total N, P, K, and S fertilizer.
  • The study concluded that balancing nutrient input-output in crop field helps avoid inadequate or excessive fertilization for sustainable crop production while also reducing negative environmental impacts.

Statistics:

  • 25% increase in nitrogen and potassium
  • 25% reduction in phosphorus and sulfur
  • 30 cm crop residue addition
  • 3-4% to 7-8% nutrient loss from leaching
  • 27-37% loss of applied nitrogen due to volatilization, denitrification, and leaching
  • 2.9-5.1 kg ha-1 addition of nitrogen via irrigation and rainfall
  • 2.4-4.2 kg ha-1 addition of phosphorus via irrigation and rainfall
  • 3.2-5.7 kg ha-1 addition of potassium via irrigation and rainfall
  • 2.6-5.1 kg ha-1 addition of sulfur via irrigation and rainfall

Sources:

  • Heliyon. (2025). Balancing of crop nutrients requirement to maintain agricultural sustainability. Heliyon, 11(11), e43476. doi: 10.1016/j.heliyon.2025.e43476
  • Balancing of crop nutrients requirement to maintain agricultural sustainability. (2025). NewsRx LLC.