FieldShift Give your soil a memory.

Transparency

Methods and data

What the app measures, how scores are built, and what it cannot tell you.

Current data source

Demonstration dataNASA data has not been received yet. Demonstration data is being used.

Source: Demonstration data (not NASA observations)

Units: ndvi: index 0-1 · soilMoisture: m³/m³ · landSurfaceTemp: °C · precipitation: mm/month

Limitations: Illustrative values only. Real products differ in resolution, revisit time and quality.

The app never presents demonstration values as NASA observations. The badge and source line change automatically when a valid NASA file is loaded.

How the overall score is built

Overall score = Σ (dimension score × weight), rounded to 0–100. Weights are provisional design values and are re-normalised after priorities and season setup are applied.

Soil benefit
32%
Water fit
25%
Climate fit
16%
Diversity
9%
Season fit
9%
Priority alignment
9%
Soil benefit
Legume nitrogen fixation, a following nitrogen-demanding crop, same-family penalties, and soil-type fit.
Water fit
Average crop water demand compared with an estimated supply for rain-fed, sprinkler or drip irrigation.
Climate fit
Heat tolerance against the observed heat-risk value.
Diversity
The number of distinct crop families in the sequence.
Season fit
How close each crop is to your chosen sowing month and cool/warm preference. It is not scored when neither is set.
Priority alignment
The average of the dimensions your selected priorities map to. It is not scored when no priorities are chosen.

What the observation layers mean

NDVI

A vegetation greenness index. Useful for seasonal vigor and anomalies; not a direct measure of yield or nutrients.

Soil moisture

Satellite products such as SMAP estimate near-surface moisture at coarse resolution. Confirm with a probe or hand test.

Land surface temperature

The temperature of the surface, not the air. Useful for heat-stress screening, especially around flowering.

Precipitation

Gridded rainfall products such as GPM IMERG can differ from a field rain gauge, especially in hilly terrain.

Adding NASA data when it arrives

Place a file named data/nasa_observations.json on the server. The app validates that every series has the same length, then switches the badge and source line automatically. If the file is missing or invalid, demonstration data stays active.

{
  "meta": {
    "source": "NASA product name and version",
    "updated": "YYYY-MM-DD",
    "units": {
      "ndvi": "index 0-1",
      "soilMoisture": "m³/m³",
      "landSurfaceTemp": "°C",
      "precipitation": "mm/month"
    },
    "limitations": "Resolution, revisit time and quality notes",
    "products": ["MODIS", "SMAP", "ECOSTRESS", "GPM IMERG"]
  },
  "labels": ["Jan", "Feb", "Mar", "Apr", "May", "Jun",
             "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"],
  "ndvi": [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
  "soilMoisture": [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
  "landSurfaceTemp": [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
  "precipitation": [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
  "heatRisk": 2.5
}

The example uses zero placeholders only to show the shape. Do not upload it as real data. Replace the zeros with the received observations and document the product, units, dates, resolution and limitations in meta. All-zero series are rejected so placeholders cannot be shown as NASA observations.

Crop parameters in the model

CropFamilySeasonWaterN demandN fixationHeat toleranceSowing months
Wheat Grass Cool 2/3 3/3 0/3 2/3 March, October, November
Barley Grass Cool 1/3 2/3 0/3 2/3 March, April, October, November
Maize Grass Warm 3/3 3/3 0/3 2/3 April, May, June
Sorghum Grass Warm 1/3 2/3 0/3 3/3 May, June
Soybean Legume Warm 2/3 1/3 3/3 2/3 May, June
Lentil Legume Cool 1/3 1/3 2/3 2/3 March, April, October, November
Canola Brassica Cool 2/3 2/3 0/3 1/3 March, April, September, October
Sunflower Asteraceae Warm 2/3 2/3 0/3 3/3 April, May
Potato Nightshade Cool 3/3 3/3 0/3 1/3 March, April, May

These are illustrative design values. Replace them with sourced FAO or national extension guidance before using the app for real decisions.

Honest limits and privacy

Farm setupDashboard