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Case study

Cutting irrigation water use on a farm

A farm with drip irrigation and pivots, where the decision to irrigate followed the calendar rather than what the soil actually held.

The demo runs on its own: the cursor opens a sector, reads the probes and starts irrigation. You can also click any plot, pivot, the reservoir or the station.

COA Campo Kwanza Farm · 24 ha · Week 38 · tomato and maize season Online --:-- Irrigation · T. Muhongo
Water applied today—
Sectors irrigating—
ETo today—
Reservoir—
Active alerts—
S1Sector 1 · Tomato— %! S2Sector 2 · Maize— %! S3Sector 3 · Beans— %! S4Sector 4 · Potato— %! P1Pivot 1 · Maize— %! P2Pivot 2 · Soy— %! RES — % ! PUMP — bar ! MET — °C !
Daily log

    A representative scenario, built from the problems we see most often in this kind of site. Exact figures vary from one installation to another.

    Starting point

    The farm has four drip sectors and two pivots, fed from a borehole and a reservoir. Irrigation followed a fixed calendar, adjusted by eye by the foreman.

    Main problem

    Irrigating by calendar wastes water on soil that is still moist and arrives too late on soil that has already dried out. With no measurement, there was no way to know which case applied to each sector.

    Solution put in place

    Moisture probes at three depths in every sector feed COA Campo, which shows soil status on a map and starts irrigation when moisture drops below the threshold set for each crop.

    Key results

    Over one full season with the system installed:

    -35%

    water applied per hectare

    +18%

    yield on the reference plot

    1 season

    for the investment to pay back

    Day to day

    What the team sees on screen

    COA-IoT
    COA Campo — Mapa da exploração Últimos 7 dias
    Setores a regar
    3/4
    Água aplicada/ha
    -35%
    vs. calendário fixo
    Humidade média
    24%
    -3%
    Humidade do solo por setor (%)
    Setor 1 Setor 2
    Setores de rega
    Setor 1 — Milho Humidade a 18% Rega iniciada
    Setor 2 — Hortícolas Humidade a 42% Normal
    Pivô Sul Em rega Em rega

    COA Campo — Mapa da exploraçãoFarm map, with each sector's moisture and the pivots irrigating.

    COA-IoT
    Setor 1 — Ficha Últimas 24 horas
    Humidade (30cm)
    18%
    -4%
    Caudal
    3.2 m³/h
    +0.4
    Humidade a 3 profundidades (%)
    10cm 30cm 60cm
    18% Humidade atual
    30% Limiar de rega

    Setor 1 — FichaA sector's record: moisture at three depths, flow and water applied that day.

    Does this sound familiar?

    Tell us about your site. We survey it in person and tell you, before proposing anything, what is worth measuring and at what cost.