Mapped paddocks
Draw each boundary once. Area is calculated, colours are yours, and every soil and compaction reading lands in the right place.
The platform
One record, three parts
7indicators per sample
Part one — the probe
TerraProbe
Measures moisture, conductivity and temperature in the paddock — the EC signal zone mapping already trusts — then saves a GPS farm record so lab money goes where variation is. Pair it with a penetrometer to log compaction at the same named points.
See the probeIn one insertion
Seven indicators, every sample
Moisture, EC and temperature are measured directly. pH, N, P and K are indicative values calculated from conductivity. Tap each one for how it works and why it earns a place on the probe.
Moisture · % Measured
How wet the soil is at the tip — the starting point for almost every other reading.
How it works
Measured directly. Specified to ±2% between 0 and 50% moisture, ±3% above that.
Why it matters
Moisture drives whether nutrients can move to roots, how plants cope between falls of rain, and whether a dry or wet spell is showing up in that paddock yet. Tracked at the same GPS point, it shows how the profile fills and empties across a season.
Questions it helps you ask
Is this paddock drying faster than the one next door? Did the last rain reach the depth I care about?
Measured directly by the probe. Comparable between visits when you sample at a similar depth and moisture.
Conductivity · µS/cm Measured
Electrical conductivity (EC) — a direct read on dissolved salts, and the reading four other indicators are built from.
How it works
Measured directly, to ±3% of full scale. Needs soil moisture above about 20% to be meaningful.
Why it matters
Salts affect how hard roots work for water and can flag fertiliser residue or rising salinity. EC moves with moisture, so comparing readings at similar wetness — or watching the trend at one point — is more useful than a single number alone. It is also the measurement the pH, N, P and K screens are calculated from, which is why it repays attention.
Questions it helps you ask
Is EC climbing where I have been applying product? Does it fall after rain the way I expect?
Measured directly by the probe. Comparable between visits when you sample at a similar depth and moisture.
Temperature · °C Measured
Soil temperature at depth — context for biology and for reading the other numbers.
How it works
Measured directly, to ±1°C.
Why it matters
Warmth and cold change microbial activity and how plants respond. Temperature also helps you interpret moisture and nutrient readings taken on different days. Saved with the sample, it stops you comparing a July reading to a January one as if they were the same conditions.
Questions it helps you ask
Am I sampling in comparable conditions? Has the profile warmed enough for the season I am planning around?
Measured directly by the probe. Comparable between visits when you sample at a similar depth and moisture.
pH Screened
A conductivity-based screen for where soil may be drifting acid or alkaline.
How it works
Screened, not measured. This probe has no pH electrode — the value is calculated from the conductivity reading and reported across a 3–9 range. Treat a shift as a reason to book a laboratory pH test, not as a pH figure to act on.
Why it matters
pH sits underneath nutrient uptake, and when it drifts the same fertiliser program can look weaker without anything else changing. That makes it worth watching — but it also makes it worth measuring properly. A laboratory pH, reported against CaCl₂, is what a liming decision needs.
Questions it helps you ask
Has this corner moved since last season? Is that shift worth a lab suite?
Screened from the conductivity reading, not measured directly. pH, N, P and K are all calculated from that one measurement, so they rise and fall together — read them as a single signal about salts and fertility, not four independent results. Use accredited laboratory testing for any decision that needs a number.
Nitrogen · mg/kg Screened
A conductivity-based screen for where nitrogen may vary across a paddock.
How it works
Screened, not measured. Calculated from conductivity using a stored coefficient, so it responds to total dissolved salts rather than to nitrogen specifically.
Why it matters
Nitrogen is mobile and changes quickly with moisture, temperature and crop demand, which is exactly why a lab snapshot weeks later can miss what the paddock was doing. A screen is for seeing relative change and hotspots between points sampled the same day in the same soil — never for writing a rate.
Questions it helps you ask
Where does this look different across the paddock? Is the pattern worth chasing with proper chemistry?
Screened from the conductivity reading, not measured directly. pH, N, P and K are all calculated from that one measurement, so they rise and fall together — read them as a single signal about salts and fertility, not four independent results. Use accredited laboratory testing for any decision that needs a number.
Phosphorus · mg/kg Screened
A conductivity-based screen for spatial variation, in a nutrient that tends to stay put.
How it works
Screened, not measured, from the same conductivity reading as N and K.
Why it matters
Phosphorus underpins root establishment and energy in the plant, and it moves slowly — so spatial differences persist. A low patch stays low unless you address it. Use the screen to decide where a targeted lab suite is worth paying for, rather than testing every hectare.
Questions it helps you ask
Is the low area the same place as last year? Is the variation worth a targeted lab suite?
Screened from the conductivity reading, not measured directly. pH, N, P and K are all calculated from that one measurement, so they rise and fall together — read them as a single signal about salts and fertility, not four independent results. Use accredited laboratory testing for any decision that needs a number.
Potassium · mg/kg Screened
A conductivity-based screen, in a nutrient tied to plant water use and stress tolerance.
How it works
Screened, not measured, from the same conductivity reading as N and P.
Why it matters
Potassium helps plants regulate water and respond to stress. Watching it at fixed points can show whether a paddock is drifting relative to its own history — but a portable reading is a lead, not a prescription.
Questions it helps you ask
Is this falling in the zones that work hardest through dry stretches? Does it track with stress I already notice?
Screened from the conductivity reading, not measured directly. pH, N, P and K are all calculated from that one measurement, so they rise and fall together — read them as a single signal about salts and fertility, not four independent results. Use accredited laboratory testing for any decision that needs a number.
Part two — the app
Capture in the paddock, sync when you have signal
TerraTactics Field Intelligence (Android and iOS) pairs to your account with a one-time link code and holds readings locally until it can upload them.
- Works with no reception and syncs later
- GPS location attached to every sample automatically
- Penetrometer compaction logged in PSI or kPa, with GPS
- Duplicate samples are not saved twice
- If a phone is lost, unlink it from the farm
Soil compaction
Log penetrometer resistance beside the soil record
Compaction is physical context, not another chemistry indicator. Push a cone penetrometer, enter depth and resistance in PSI or kPa, and the app or portal keeps a GPS-tagged record you can compare with traffic lanes, stock camps and control areas.
- Same named points as your soil readings
- Both PSI and kPa shown on the farm record
- Moisture still matters — note conditions with each test
Part three — the portal
Where the record actually lives
Map your paddocks, review readings, compare across seasons, and get screening commentary that shows its working.
Season comparison
Filter by paddock, sample point and period, then chart any of the seven indicators against each other.
Screening insights
Deterministic commentary that quotes the values behind every observation and names the next responsible step.
Take the numbers with you
On Grower you can download a spreadsheet of the readings you have filtered.
Optional — TerraTactics Soil Analysis
TerraTactics Soil Analysis
On Grower you can ask for a briefing of the readings you select. The rules are deliberate and strict.
- Analyses only the readings you selected — no invented local facts
- Quotes the exact measured values and dates behind every finding
- Never prescribes a product, a chemical or an application rate
- Flags when laboratory testing or a local agronomist is warranted
- Sends only a coarse, rounded location — never your exact paddock coordinates
Decision support, not advice Analysis output can be incomplete or wrong. It does not replace sampling design, accredited testing or professional agronomy.
Plans
Choose how much record you need
Field
For getting started on one or two paddocks
Free
no card required
- 2 mapped paddocks
- 100 stored soil readings
- 6 months of season history
- 1 linked Android phone
- Paddock notes and point notes
- 10 laboratory reports on file
- Full seven-indicator record
- Screening insights
- Download a spreadsheet
- TerraTactics Soil Analysis
- Advisor client farms
- Priority support
Grower
For a working farm across a full rotation
$
39
per month
- Unlimited mapped paddocks
- 10,000 stored soil readings
- 5 years of season history
- 3 linked Android phones
- Paddock notes and laboratory report library
- Download a spreadsheet of your readings
- TerraTactics Soil Analysis, 20 runs a month
- 2 farm properties, kept separate
- Advisor client farms
- Priority support queue
14-day trial, cancel any time.
Advisor
For independent agronomists sampling client farms
$
79
per month
- Up to 25 client farms in one account
- One linked phone targets the farm you are on
- Unlimited paddocks and readings
- Paddock notes and laboratory report library
- Full season history
- Download spreadsheets of the farms you sample
- TerraTactics Soil Analysis, 60 runs a month
- Printable reports you share with clients
- No client logins or agency overhead
- White-label agency portal
- Partner wholesale ordering
14-day trial, cancel any time.
Ready to start
Map one paddock and take a reading
The probe, the app and the portal are designed to work together — start with either.