Soil Testing &
Scientific Sampling
Understanding your soil fertility status and nutrient profile is crucial for sustainable farming. Follow our scientific guidelines to collect representative soil samples for accurate laboratory analysis.
Why is Soil Sampling Crucial?
Soil sampling is the most critical step in understanding the fertility status and health of your farmland. By analyzing chemical, physical, and biological properties, you can identify the exact nutrient profiles of your soil.
This data supports informed decision-making regarding custom fertilizer applications, manure requirements, and crop planning, which directly leads to higher yields, cost savings, and healthier plants.
Target Sample Quantity
Each composite soil sample must weigh approximately 200 grams after proper mixing, quartering, and drying.
Defining Land & Sampling Strategy
3.1 Plot Definition
Treat areas as separate plots if they show variations in:
- Uniform soil color, texture, or type.
- Cropping history and future cropping plans.
3.2 Sampling Density
- Ideally, collect one composite sample per acre.
- For each plot, collect soil from 6 to 8 different locations across the area.
- Mix these subsamples thoroughly to form a single representative composite sample.
Standard Operating Procedure
Follow these steps carefully to ensure the integrity of your soil test sample.
🛠️ Materials Required
- Soil auger, pipe, or spade
- Clean plastic bucket
- Marker pen and labels
- Zip-lock bags
- Measuring tape
- Smartphone for GPS tracking
🚫 Field Preparation Warnings
- ⚠️Avoid sampling near bunds, water channels, compost pits, or waterlogged zones.
- ⚠️Collect samples before fertilizer/manure application or at least 20–25 days after the last application.
- ⚠️Ensure normal soil moisture—the soil should not be excessively wet or bone dry.
Prepare Field
Remove surface debris like grass, dry leaves, and stones. Identify 6–8 random spots across your designated plot area following a zigzag pattern.
Collect Sample
At each marked point, dig a V-shaped pit using a spade or auger to the recommended depth. Scrape and collect soil from the side wall of the pit.
Combine & Mix
Place all 6-8 samples into a clean bucket. Mix thoroughly. Use the quartering method: divide soil into 4 parts, discard opposite quarters, mix the rest, and repeat until ~200g remains.
Final Packaging
Place the ~200g composite sample in a clean zip-lock bag. Insert a written label containing all sample IDs, Farmer Name, and GPS coordinates between two layers of the bag.
Recommended Sampling Depth
Sampling depth varies depending on the root system of your target crop.
| Crop Type / Situation | Depth (cm) | Depth (inches) |
|---|---|---|
| Field crops, grains, oilseeds | 5 cm | 2 inches |
| Vegetables, tuber crops, leafy vegetables | 15 cm | 6 inches |
| Sugarcane, fruit crops, floriculture, banana | 22 cm | 9 inches |
| Deep-rooted crops, perennials, orchards | 30–90 cm | 12–36 inches |
Sample Identification
Each soil sample must be uniquely labeled to ensure correct test results mapping.
Sample ID Format:
<FarmName>_<FarmerName>_<PrevCrop>_<NextCrop>_<MobileNumber>_<PinCode>_<VillageName>_<GeoTag>GreenValley_RameshKumar_Wheat_Maize_9876543210_560102_Bettahalli_12.913°N77.632°EGeo-Tagging Process
Geo-tagging ensures every sample is linked to its physical location for precision tracking and regional recommendations.
- Open the Ekosight Soil Sampling Web Portal (link provided by our team).
- Enter the farmer and plot details.
- Enable device location (GPS) to auto-capture exact coordinates.
- Upload sample details and an optional photo of the soil.
- Submit to generate your unique Geo-tagged Soil Sample ID.
Summary Checklist & Packing
💡 Key Quality Tips:
- Never use cloth or paper bags for storing samples (they absorb moisture).
- Always use clean tools and plastic containers.
- Avoid sampling immediately after rain or irrigation.
- Verify GPS coordinates before final submission.