mg/kg; 10% are sufficient and 90% have insufficient available Zn content; the available Mn level was insufficient in all soil samples.

The gap

Consensus across the literature

Supporting evidence — 3 representative gaps

• Spatial variability and GIS-based mapping of soil chemical properties in the Chambal region, Madhya Pradesh (2026) · doi

  Among the micronutrients, Zn deficiency emerged as a major limitation, whereas Fe, Cu and Mn showed variable but generally adequate status.

  Keywords: among micronutrients deficiency emerged major limitation variable generally adequate status
• PROTOCOL: Agronomic biofortification strategies to increase grain zinc concentrations for improved nutritional quality of wheat, maize and rice: a systematic review (2017) · doi

  However, the effects of soil and foliar fertilisation on zinc concentrations beyond basic plant nutrition and productivity remain not fully understood.

  Keywords: effects soil foliar fertilisation zinc concentrations beyond basic plant nutrition productivity remain fully understood
• Ağrı/Eleşkirt Yöresi Tarım Topraklarının Verimlilik Durumunun Değerlendirmesi (2022) · doi

  78 mg/kg; 10% are sufficient and 90% have insufficient available Zn content; the available Mn level was insufficient in all soil samples.

  Keywords: insufficient available sufficient content level soil samples