Work out nursery seedling count instantly with clear inputs, formula shown and shareable results.
Nursery output is cells sown x emergence rate x (1 - cull rate). Emergence covers seeds that never came up; culling removes leggy, diseased or undersized plants at grading. Only the survivors of both stages are worth loading onto the transplanter.
Nursery output
Usable seedlings = trays x cells x emergence % x (1 - cull %)
Divide the field's plant requirement (population plus gap-filling allowance) by the usable seedlings per tray, then round up to whole trays.
Good-quality graded seed in a controlled nursery gives 90-95%. Untreated or older seed, cold soil temperature and uneven watering pull it well below that.