Crop protection costs: a field monitoring break-even example

Start with operation records

Choose one operation and record its treated area, product cost, machinery cost and labour. Then record the extra scouting, planning and software cost needed for the proposed workflow. Count an avoided pass only once, even if several records point to it.

A change on a vegetation map is a reason to inspect. It does not establish which crop protection product, rate or treated area is appropriate. The responsible agronomist must determine whether a proposed change is suitable under the product label and local requirements.

A worked example with explicit assumptions

The following figures are illustrative, not a customer result or Planva price. All amounts are in the same currency units. Assume that an agronomist has already approved an 80-hectare operation instead of a 100-hectare operation and that the outcome remains acceptable. The cost model cannot establish that agronomic assumption.

The apparent operation reduction is 400, but the net cost difference is only 100 after the additional work and software. The 20 per ha includes product, machine and operation labour in this example. Do not add those costs a second time.

Find the break-even point

Additional cost is 300. At 20 per ha, avoiding 15 hectares of the assumed operation covers that cost: 300 ÷ 20 = 15. Avoid only 10 hectares and total cost becomes 2,100, which is 100 above baseline. Avoiding no work while adding the same monitoring costs gives 2,300.

If the change affects yield, quality or later operations, add those effects before making a purchasing decision. Comparing one season with the next does not isolate the software effect because conditions and input prices change.

Where Planva fits

Planva keeps agroplans with plan and actual, machine tasks with tracks, stops and fuel events, and a reconciliation report for the dispatcher. Those records help the farm reconstruct what happened, for example whether the confirmed area matches the planned area. A record of what was done does not by itself promise an avoided treatment.

Use the NDVI guide if a map colour starts the question. Pricing depends on acreage, modules, deployment model and implementation scope, and is fixed in the proposal and contract. Compare the proposal with the farm’s own costs. If the existing system already provides reliable records and the trial shows no useful improvement, switching is hard to justify.

Define the trial before buying

Agree the fields, observation period, costs to collect and criteria for a useful result. Include staff time and deployment costs. Keep the agronomist’s decisions and their reasons with the records. Bring this cost sheet to a Planva demo and ask for the actual scope and proposal.