Work out plant population per acre instantly with clear inputs, formula shown and shareable results.
Plant population is decided entirely by geometry: each plant occupies row spacing x plant spacing, so a hectare holds 10,000 / (row x plant) plants in metres. Subtracting expected gaps and mortality converts the theoretical population into the stand you can expect to harvest.
Plant population
Plants per hectare = 10,000 / (row spacing (m) x plant spacing (m))
Standing plants
Standing = population x area x (1 - gap %)
Yield responds to plants per unit area, not kilograms of seed. Two lots with different seed size and germination need different seed rates to reach the same population.
Use the average of the narrow and wide row spacings as the effective row spacing, then apply the same formula.