Case Study · Satellite Diagnostic Report

Farm A7 — Queen Creek, Arizona

Sentinel-2 NDVI & Water Analysis Report — a full multispectral diagnostic of chlorophyll vigor, canopy hydration, and irrigation performance across the operation.

Target Location

Farm A7, Queen Creek, AZ

Acquisition Date

July 12, 2026

Satellite Platform

Sentinel-2B Multi-Spectral

Tile Identifier

T12SVB_0_20260712

Bounding Box

[-111.602, 33.219, -111.578, 33.227]

Processed By

FieldSight AI Analytics Engine

Overall Farm Health Score

58/100

Moderate to Severe Stress Detected

Executive Overview

This report provides an in-depth remote sensing evaluation of Farm A7 in Queen Creek, Arizona using Sentinel-2 observations captured on July 12, 2026. The analysis integrates two core spectral indicators — NDVI to evaluate chlorophyll content and canopy coverage, and NDWI to measure leaf tissue moisture and surface hydrology.

With an aggregate score of 58/100, the farm shows substantial spatial variation. Western orchard and row crop blocks are healthy, while central and east-central management blocks exhibit severe vegetation deficit and water stress driven by mid-summer heat and irrigation non-uniformity.

Immediate Attention Required: Over 35% of the evaluated acreage falls in the low-NDVI / low-NDWI stressed category, indicating potential yield reduction if corrective irrigation and soil remediation are not taken quickly.

Diagnostic Sub-metrics

Key Health Score Breakdown

Photosynthetic Vigor (NDVI)

0.38

Range: -0.15 to +0.72

Reference: > 0.65

Moderate Deficit

62 / 100

Canopy Moisture (NDWI)

-0.22

Range: -0.45 to +0.35

Reference: > 0.00

Severe Moisture Stress

48 / 100

Spatial Uniformity

44.2%

Range: coverage

Reference: > 80%

High Variation

52 / 100

Irrigation Efficiency

68.5%

Range: delivery

Reference: > 88%

Sub-optimal

65 / 100

Section 01

Vegetation Index (NDVI) Analysis

NDVI quantifies vegetation by comparing near-infrared (Band 8) reflectance — which healthy canopies strongly reflect — with red light (Band 4), which vegetation absorbs for photosynthesis.

NDVI = (NIR − Red) / (NIR + Red) = (B8 − B4) / (B8 + B4)

Sentinel-2 NDVI map for Farm A7 showing dense healthy canopy zones in dark green and stressed / fallow zones in red and orange

Figure 1 — Sentinel-2 NDVI Map for Farm A7 (Jul 12, 2026). Dark Green = Dense/Healthy Canopy (NDVI > 0.6); Light Green/Yellow = Moderate Canopy (NDVI 0.3–0.5); Dark Red/Orange = Stressed Vegetation / Fallow Soil (NDVI < 0.25).

Zonal Breakdown

Zone A — Western Parcels

NDVI0.58 – 0.72

Acreage24.5%

Healthy / High Vigor — Robust canopy coverage, strong chlorophyll absorption. Active orchard and row crops.

Zone B — Northern & NW Strata

NDVI0.32 – 0.55

Acreage38.0%

Moderate Vigor — Early-stage crops or light canopy thinning due to summer heat stress.

Zone C — Central & Eastern Sector

NDVI-0.12 – 0.28

Acreage37.5%

Severe Vigor Deficit — Bare soil, fallow fields, harvested plots, or severely water-stressed vegetation.

Root-Cause Analysis

Thermal Stress & Evapotranspiration Deficit: Mid-July temperatures in Queen Creek regularly exceed 105°F (40.5°C), triggering stomatal closure and lowering photosynthetic rate — producing NDVI dips in vulnerable plots.
Unvegetated & Infrastructure Footprints: Deep red signatures in the eastern sector correspond to non-cropped infrastructure (event venues, parking, structures) and fallow fields awaiting fall crop preparation.
Uneven Orchard Canopy Development: Patchy green-to-yellow transitions in central tree crop zones indicate drip emitter clogging or soil compaction restricting root establishment.

Section 02

Water Index (NDWI) & Hydrology

NDWI assesses plant canopy liquid water content and surface hydrology using green (Band 3) and short-wave infrared (Band 11) reflectance.

NDWI = (Green − SWIR) / (Green + SWIR) = (B3 − B11) / (B3 + B11)

Sentinel-2 NDWI map of Farm A7 showing bright blue open water, green hydrated canopy, and light grey moisture stressed fields

Figure 2 — Sentinel-2 NDWI Map for Farm A7 (Jul 12, 2026). Bright Blue = Open Surface Water; Green = Hydrated Canopy / Moist Soil; White/Light Grey = Dry Soil & Moisture Stress.

Hydrologic Feature	NDWI Value	Spatial Location	Operational Status
Retention Pond / Reservoir	+0.28 to +0.35	Northeast Sector	Optimal — High open water signature; full storage capacity detected.
Irrigated Crop Canopies	-0.08 to +0.05	West / South-West Corridors	Adequate Moisture — Well-maintained leaf tissue hydration in drip-irrigated zones.
Water-Stressed Soil & Vegetation	-0.42 to -0.25	Central & Eastern Fields	Severe Moisture Deficit — Low plant tissue water and dry topsoil across large contiguous blocks.

Cross-Index Correlation: Overlay analysis demonstrates a 0.84 correlation coefficient between low-NDWI and low-NDVI areas. The primary limiting factor for crop health at Farm A7 is irrigation delivery insufficiency — not pest or disease pressure.

High Soil Moisture Evaporation: Sandy loam soils common to Queen Creek lose topsoil moisture rapidly under summer solar radiation without mulch or cover crops.
Irrigation Canal Line Losses: Delivery channels along field boundaries show localized moisture seepage without optimal crop uptake.
Retention Pond Utilization: The northeast basin is fully filled, but pressure drop in the pump/gravity line to central fields is causing underwatering in remote field blocks.

Section 03

Agronomic Diagnostics & Root Causes

FieldSight AI ran a multi-factorial diagnostic combining spectral curves, local meteorological telemetry, and soil hydrology models to explain the 58/100 score.

Diagnostic Stressor	Impact	Primary Evidence	Underlying Root Cause
Extreme Thermal Stress	High	Widespread NDVI drop in unshaded non-orchard fields.	Mid-summer heat waves exceeding plant transpiration recovery limits.
Drip / Pivot Clogging	Medium-High	Linear banding patterns in NDWI white/green zones.	Mineral buildup (calcium/carbonate) from hard groundwater sources.
Soil Salinity & Compaction	Medium	Stunted canopy patches despite routine irrigation scheduling.	High sodium adsorption ratio (SAR) restricting root water potential.
Seasonal Fallow Transition	Expected	Large contiguous low-NDVI blocks in eastern sector.	Planned rotation between spring harvest and autumn pumpkin/peach planting.

Crop Water Stress Index (CWSI)

CWSI = [(Tc − Ta) − (Tc − Ta)ₗₒ] / [(Tc − Ta)ᵤₚ − (Tc − Ta)ₗₒ]

Central Sector CWSI = 0.68 (severe water stress threshold > 0.50).

Composite Field Health Index (FHI)

FHI = 0.45 × (NDVI/NDVIₘₐₓ) + 0.45 × (NDWI/NDWIₘₐₓ) + 0.10 × (Uniformity)

Aggregate FHI = 0.58 → 58 / 100 score.

Key Finding: Correcting irrigation distribution and mitigating line pressure losses in Zone C can improve composite FHI from 0.58 → 0.78 (78/100) within 21 to 30 days.

Section 04

Action Plan & Remediation Roadmap

A phased 30-60-90 day roadmap to restore canopy health and optimize water productivity.

Phase 1 — Immediate Remediation

Days 1 – 14

›Targeted irrigation flushing & mild organic/citric acid treatments in Zone C to dissolve mineral scaling and restore uniform emitter flow.
›Shift to multi-pulse night / early-morning irrigation (3:00 AM – 7:00 AM) to minimize evaporative loss.
›Deploy 12 IoT soil moisture probes at 15 cm, 30 cm, and 60 cm across Zone C to ground-truth NDWI measurements.

Phase 2 — Soil & Crop Recovery

Days 15 – 45

›Apply humic/fulvic acid blends via fertigation to improve soil water holding capacity and reduce sodium stress.
›Apply organic straw/chip mulch to high-value orchard tree bases to reduce soil surface temperature by 10–15°F.
›Variable-rate fertigation guided by NDVI: boost N/K in Zone B, withhold on non-cropped areas.

Phase 3 — Long-Term Optimization

Days 46 – 90

›Upgrade the northeast retention reservoir pump manifold to maintain > 45 PSI across central and southern parcels.
›Establish heat-tolerant cover crops (Cowpea, Sunn Hemp) on unplanted Zone C fields to prevent erosion and build organic matter.

Target Score Improvement Trajectory

Milestone	NDVI	NDWI	Health Score
Current Baseline (Jul 2026)	0.38	-0.22	58 / 100
Day 30 Post-Remediation	0.48	-0.08	70 / 100
Day 60 Post-Remediation	0.58	+0.02	81 / 100
Day 90 Full Recovery	0.66	+0.10	88 / 100

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