Fertigation Recommendation
Feed the root zone. Read the crop. Adjust with evidence.
Fertigation is more than choosing a fertilizer recipe. SoilBeat combines irrigation-water, drainage and plant sap analyses to show how your fertigation system is performing, where nutrient patterns may be going off course, and what deserves investigation before the next adjustment.
The water you apply, what comes back from the root zone and how the plant responds, in one report.
Why fertigation is difficult
Why fertigation decisions are difficult
Fertigation is the ongoing task of matching nutrient and water supply to crop demand while managing the chemistry of the root zone.
The recipe is only one part of the system
Source-water chemistry, pH, alkalinity, salinity, soil or substrate properties, irrigation volume, drainage and crop uptake all influence what becomes available to roots and what stays in the root zone.
What goes in is not what the plant takes up
A concentration in the feed can differ from the one in drainage. That difference is a useful signal, but not a measurement of uptake: water use, substrate, precipitation, sampling time and irrigation strategy all play a part.
The plant may tell a different story
A nutrient can be present in irrigation water or drainage while plant sap shows a low level. That calls for investigating availability, root conditions, interactions and demand, not automatically supplying more.
Small adjustments, wider consequences
Changing one nutrient or the pH can affect other nutrients, salinity, precipitation risk and root-zone conditions. Decisions should consider the whole system, not optimise one number.
Is the nutrient supplied? Is root-zone chemistry changing? Does the plant show the expected status? What else could explain a mismatch?
What SoilBeat combines
Three perspectives. One root-zone and crop picture.
When the analyses are aligned by crop, management zone and sampling period, SoilBeat places plant status alongside irrigation and drainage results.
Irrigation water: what enters the system
Review the chemistry of the water and nutrient solution supplied to the crop, such as pH, EC, alkalinity, macro- and micronutrients, sodium and chloride, to see what the water contributes and where it may constrain management.
Drainage: what leaves the root zone
Compared with irrigation, drainage can flag possible accumulation, depletion, salinity pressure or changing root-zone chemistry. Read it alongside drainage fraction, irrigation volumes, substrate conditions and sampling time.
Plant sap: how the plant is responding
Young- and old-leaf measurements, target ranges, nutrient mobility and trends show nutritional patterns that deserve attention. Plant sap alone does not establish why a pattern exists.
How it works
From three analyses to a reviewed plan in six steps
SoilBeat aligns the evidence, separates strong signals from hypotheses, and leaves the decision with the agronomist.
Align the samples
Connect plant sap, irrigation and drainage results to the same crop and management zone, checking dates, units and sample identities.
Review the incoming water
Assess the water chemistry, including pH, EC, alkalinity and nutrient contributions where those measurements are available.
Compare irrigation and drainage
Identify differences in nutrient concentrations and root-zone indicators. Treat them as signals to investigate, not as proof of uptake or loss.
Compare the plant response
Review plant sap status against the applicable targets and interpret young- and old-leaf patterns in context.
Build a prioritised interpretation
Bring the evidence together, identify possible explanations and separate strong signals from hypotheses that need checking.
Plan, implement and monitor
Prepare practical next steps for agronomist review, record the selected activities, and repeat the relevant measurements to see the response.
Where sample dates, units, crop-zone links or values conflict, the report flags the issue instead of silently reconciling the data.
What you get
What a SoilBeat fertigation report gives you
One report per management zone and sampling round, built from your plant sap, irrigation-water and drainage results.
Report summary
The three samples side by side: plant sap, irrigation and drainage, each with crop, zone, sampling date and sample ID, so you can check straight away that they belong together.
Headline diagnosis
A joined-up interpretation of crop and root-zone evidence in a few sentences, with uncertainty made visible where the data don’t establish a cause.
Action plan by urgency
Water-side actions that change the recipe or irrigation, and crop-side actions that steer the plant, grouped as immediate (within 48 hours), urgent (within 7 days) or strategic, each with the reason and evidence behind it.
Leaf and root zone in one row
For every nutrient, the plant sap status against its target sits directly above the irrigation and drainage values, marked as accumulating, balanced or depleting in the root zone, with bars to compare them.
Application and monitoring plan
Products, rates and timing once enough validated information is available and an agronomist has approved the plan, plus the follow-up measurements to check whether the expected change happens.
Your name on the report
Reports carry your company name and contact details, so they go to the grower as your advice, reviewed by you.
Every report states that the interpretation is AI-assisted and should be checked by a certified agronomist before anything is implemented.
Examples from real reports
The questions a combined analysis helps you investigate
Three patterns from anonymised SoilBeat fertigation reports, and why each one is a question to check rather than a prescription.
Acidic root zone, high plant aluminum
In a blueberry crop, drainage pH was 4.2 while plant sap aluminum was excessive. Before changing pH targets or the ammonium share of the feed, check crop requirements, sample validity and substrate and water chemistry.
High plant nitrogen, low sulfur
The same blueberry report showed excessive sap nitrogen and deficient sulfur, prompting a look at the nitrogen-to-sulfur balance of the recipe. A specific change needs crop stage, current supply, substrate status and product composition first.
Micronutrients in drainage, low in the plant
In a bell pepper crop, iron and manganese were low in plant sap while drainage concentrations were high. That points to root-zone pH, availability, precipitation, sampling alignment and root function, since high drainage doesn’t prove availability.
Recommendations depend on crop, cultivar, growth stage, growing medium, irrigation strategy and source water. Exact recipe changes, pH targets and rates must be checked before implementation.
Why agronomists use SoilBeat
Built for agronomic review
SoilBeat supports professional judgement; it does not replace it.
See connections across separate reports
Irrigation, drainage and plant sap evidence in one view, so you move from isolated numbers to structured questions about supply, root-zone conditions and plant response.
Make decisions with context
Measured values, target comparisons and explanatory reasoning together, with observations kept apart from possible mechanisms that still need checking.
Prioritise what to investigate first
A structured summary and action plan to discuss the highest-priority issues with the grower, and the measurements or field checks needed next.
Close the loop
Record the actions taken and review new irrigation, drainage and plant sap results to see whether the system is moving in the intended direction.
Connect the water you apply with the plant you grow.
Bring irrigation-water, drainage and plant sap results together to understand the root-zone system, prioritise the next questions and make better-informed fertigation decisions.
Questions about SoilBeat
What should I know before starting?
What is a SoilBeat fertigation report?
A combined read of plant sap, irrigation-water and drainage analyses for one management zone and sampling round: a summary, a headline diagnosis, an action plan by urgency, a combined nutrient table and a monitoring plan. See PlantSap Recommendation.
Which analyses do I need?
Plant sap, irrigation water and drainage from the same crop and zone, taken in the same period. If one measurement is missing for a nutrient, the report shows it as not measured instead of guessing. Check supported lab reports.
Does the difference between feed and drainage show what the plant took up?
No. It is a useful signal, but water use, substrate interactions, precipitation, sampling time and irrigation strategy all influence drainage. That is why SoilBeat reads it together with plant sap and, where available, drainage volume. Read our guide to plant sap analysis.
Are the suggested rates ready to apply?
No. Proposed recipe changes, pH targets and rates are a starting point for agronomist review. They depend on crop, cultivar, growth stage, growing medium, irrigation strategy and source water, and must be checked before implementation. Explore SoilBeat for agronomists.
Is the interpretation written by AI?
The interpretation is AI-assisted. Every report states that a certified agronomist should be consulted before implementing its recommendations, and the agronomist decides which actions go ahead. Explore agronomic intelligence.
What happens when the data don’t match?
Where sample dates, units, crop-zone links or reported values conflict, the report flags the issue rather than silently reconciling the data, so it can be resolved before anyone acts on it. See how advice becomes tasks.
What is the research basis?
The approach of combining water testing, recipe formulation, substrate and crop monitoring follows guidance from AHDB, Penn State Extension and University of Florida IFAS. These sources support the method; they do not validate each individual diagnosis. Read AHDB’s guide to managing fertigation.
Related pages
Explore more
PlantSap Recommendation
Editable plant sap reports with your own target values and young- and old-leaf comparisons.
Plant sap analysis guide
What plant sap analysis measures, how to sample and how to read the results.
SoilBeat for horticulture
Greenhouse, substrate and open-field horticulture in one connected record.
Supported lab reports
Soil, plant sap, water and more: the lab reports SoilBeat reads.
Make better-informed fertigation decisions.
Book a 30-minute demo and bring your irrigation, drainage and plant sap results.