Harvest estimate results
| Field | Crop | Area | Gross | Net | Marketable | Loss | Revenue | Costs | Net return | Harvest days | Completion |
|---|
Detailed calculation report
Field and harvest inputs
Formula used
Gross harvest depends on the selected estimation method. Physical losses are combined sequentially to avoid double counting. Moisture correction aligns measured yield with the target standard.
Area method: Gross kg = Area hectares × Yield kg per hectare Plant method: Gross kg = Productive plants × Yield kg per plant Sample method: Gross kg = (Sample kg ÷ Sample square metres) × Field square metres Moisture corrected kg = Gross kg × (100 − measured moisture) ÷ (100 − standard moisture) Combined physical loss = 1 − Π(1 − individual loss percentage) Net harvest = Moisture corrected kg × (1 − combined physical loss) Marketable harvest = Net harvest × (1 − unmarketable percentage) Net return = Revenue − Total harvest costs
How to use the calculator
Add each field and select its estimation method. Enter crop, area, sampling, loss, price, and capacity details. Review warnings before using results for operational decisions.
- Choose the field area and preferred yield method.
- Complete the inputs displayed for that method.
- Add loss, moisture, grade, price, and cost assumptions.
- Enter labour, storage, container, and transport capacity.
- Calculate, compare fields, then export the final report.
Example data
| Field | Crop | Area | Method | Base yield | Total losses | Price |
|---|---|---|---|---|---|---|
| North Field | Wheat | 12 hectares | Yield per area | 6,800 kg/ha | 8.5% | £0.31/kg |
| Orchard Block | Apples | 2.5 hectares | Fruit count | 620 fruits/plant | 11% | £1.15/kg |
| Market Garden | Tomatoes | 0.8 hectares | Sample plot | 24 kg/10 m² | 7% | £1.80/kg |
Frequently asked questions
What is a harvest estimate?
It predicts crop quantity before final harvesting begins. The estimate supports labour, storage, transport, and sales planning. Accuracy improves when representative samples and current losses are used.
Which estimation method is best?
The best method depends on crop structure and records. Area yields suit uniform field crops with reliable benchmarks. Sample methods usually provide stronger local field evidence.
How are multiple losses combined?
The calculator applies losses sequentially rather than simply adding. This prevents percentages from overstating the same lost crop. Each loss reduces the remaining harvest quantity proportionally.
Why correct for moisture?
Moisture strongly changes the measured weight of harvested produce. Markets often specify a standard moisture level for comparison. Correction gives a more comparable commercial harvest estimate.
What is marketable yield?
Marketable yield excludes damaged, rejected, or unsuitable produce. It is usually lower than gross and net harvest. This figure better supports pricing and revenue decisions.
Can it estimate several fields?
Yes, add fields with different crops and assumptions. Results appear separately and as combined farm totals. Comparisons reveal productive fields and costly harvesting constraints.
How should sample plots be selected?
Choose several representative locations across the entire field. Avoid only selecting unusually strong or weak growing areas. Random sampling usually reduces bias in harvest estimates.
What costs should be included?
Include labour, machinery, fuel, packaging, storage, and transport. Add cleaning, grading, drying, and marketing when relevant. Complete costs create a more useful net return.
How are harvest days estimated?
Harvest rate combines worker output and machine capacity. Daily hours convert required harvesting time into working days. Weather delays and downtime should be added separately.
Are results guaranteed?
No estimate can guarantee final harvested weight or revenue. Weather, maturity, sampling, quality, and prices may change. Use results as planning guidance with field inspections.