Crop Population Calculator

This calculator helps you determine optimal plant spacing for South African crops based on region, crop type, production system, rainfall, and desired plant population per hectare. Data sourced from agricultural research and regional studies.

Maize
Sunflower
Soybeans
Sorghum
Sugar Beans
600 mm
2024 Avg: N/A
90 cm
20 cm
Estimated: 55556 plants/ha

General Guidelines

  • Maize: Ultra-Early hybrids (e.g., PAN 3P-924PW) generally require higher populations than Long Season hybrids (e.g., PAN 6R-584).
  • Irrigation allows for higher plant populations across most crops and maturity groups.
  • Rainfed conditions, especially in lower rainfall areas (<500mm), necessitate lower populations to reduce water stress.
  • Longer-season maize hybrids must be planted early to avoid low temperatures and early frost. If planting is delayed, it is advisable to switch to early or ultra-early hybrids.
  • Soil Fertility: Higher fertility supports higher populations.
  • Row Spacing Adjustments: Narrower rows often allow higher populations with more efficient canopy coverage.

Agronomic Information

Average Rainfall

Recommended Row Width

Plant Population Range

Expected Yield

Days to Emergence

Optimum Planting Depth

Remarks