What the soil tests found
8
out of 10
Soil score
GoodShort in most fields here: nitrogen, iron, manganese and boron.
For most crops. How the soil score works
- soil samples, 2024-25
- 16
- nutrients checked in each sample
- 12
This shows what soil in this area tends to be like. Your own field can be different. Get it tested at a soil testing lab before deciding.
Nutrient by nutrient
-
Nitrogen
PoorLow 56% Medium 44%
6 in 10 soil tests here came out low
If your field is low: add about a quarter more urea than the usual dose, in two or three splits. A pulse crop in rotation also adds nitrogen.
What this means
Grows leaves and stems. Short soil gives pale, yellow leaves.
Low under 280 kg/ha Medium 280–560 kg/ha High over 560 kg/haHealthy soil has 280 kg/ha or more.
Compared with the wider area Place Low Medium High Here 56% 44% 0% Chhatapur 54% 46% 0% Supaul 51% 49% 0% Bihar 62% 37% 1% India 64% 30% 6% -
Phosphorus
GoodHigh 100%
Most soil tests here came out high
If your field is high: you can use about a quarter less DAP than usual.
What this means
Builds roots and helps the crop flower and fill grain.
Low under 10 kg/ha Medium 10–25 kg/ha High over 25 kg/haHealthy soil has 10 kg/ha or more.
Compared with the wider area Place Low Medium High Here 0% 0% 100% Chhatapur 2% 9% 90% Supaul 5% 9% 86% Bihar 3% 21% 76% India 14% 41% 45% -
Potassium
GoodMedium 75% High 25%
Almost every soil test here had enough
What this means
Fills grain and fruit, and helps crops stand drought and disease.
Low under 110 kg/ha Medium 110–280 kg/ha High over 280 kg/haHealthy soil has 110 kg/ha or more.
Compared with the wider area Place Low Medium High Here 0% 75% 25% Chhatapur 5% 80% 15% Supaul 8% 79% 12% Bihar 6% 72% 22% India 14% 53% 34% -
Organic carbon
GoodLow 19% Medium 56% High 25%
2 in 10 soil tests here came out low
What this means
Shows how much organic matter the soil has. It keeps soil loose, holds water and feeds the crop slowly.
Low under 0.5% Medium 0.5–0.75% High over 0.75%Healthy soil has 0.5% or more.
Compared with the wider area Place Low Medium High Here 19% 56% 25% Chhatapur 34% 45% 21% Supaul 35% 41% 24% Bihar 33% 53% 14% India 48% 28% 23% -
pH
GoodNeutral 100%
Almost every soil test here came out neutral
What this means
How sour (acidic) or alkaline the soil is. It decides which nutrients roots can take up.
Acidic Neutral AlkalineMost crops do best at pH 6.5 to 7.5.
Compared with the wider area Place Acidic Neutral Alkaline Here 0% 100% 0% Chhatapur 0% 99% 1% Supaul 0% 99% 1% Bihar 3% 96% 1% India 12% 86% 2% -
Salt
GoodNot salty 94% Salty 6%
1 in 10 soil tests here came out salty
What this means
Salt in the soil, shown as EC on the card. Salt makes it hard for roots to drink.
Not salty SaltyUnder 1 dS/m is fine. Above 4 harms most crops.
Compared with the wider area Place Not salty Salty Here 94% 6% Chhatapur 93% 7% Supaul 94% 6% Bihar 99% 1% India 96% 4% -
Sulphur
GoodEnough 100%
Almost every soil test here had enough
What this means
Makes oil in oilseeds and protein in pulses.
Short under 10 ppm Enough 10 ppm or moreHealthy soil has 10 ppm or more.
Compared with the wider area Place Short Enough Here 0% 100% Chhatapur 4% 96% Supaul 8% 92% Bihar 22% 78% India 24% 76% -
Zinc
GoodShort 19% Enough 81%
2 in 10 soil tests here came out short
What this means
Needed for growth and healthy leaves. Rice and wheat often run short.
Short under 0.6 ppm Enough 0.6 ppm or moreHealthy soil has 0.6 ppm or more.
Compared with the wider area Place Short Enough Here 19% 81% Chhatapur 20% 80% Supaul 14% 86% Bihar 23% 77% India 35% 65% -
Iron
PoorShort 75% Enough 25%
8 in 10 soil tests here came out short
If your field is short: spray ferrous sulphate, 5 g per litre of water, when young leaves turn yellow.
What this means
Keeps young leaves green.
Short under 4.5 ppm Enough 4.5 ppm or moreHealthy soil has 4.5 ppm or more.
Compared with the wider area Place Short Enough Here 75% 25% Chhatapur 26% 74% Supaul 25% 75% Bihar 7% 93% India 24% 76% -
Copper
OkayShort 44% Enough 56%
4 in 10 soil tests here came out short
If your field is short: mix 2 kg of copper sulphate per acre into the soil before sowing.
What this means
Helps the crop set seed and resist disease.
Short under 0.2 ppm Enough 0.2 ppm or moreHealthy soil has 0.2 ppm or more.
Compared with the wider area Place Short Enough Here 44% 56% Chhatapur 6% 94% Supaul 9% 91% Bihar 2% 98% India 5% 95% -
Manganese
PoorShort 63% Enough 38%
6 in 10 soil tests here came out short
If your field is short: spray manganese sulphate, 5 g per litre of water, on the young crop.
What this means
Helps leaves make food from sunlight.
Short under 2 ppm Enough 2 ppm or moreHealthy soil has 2 ppm or more.
Compared with the wider area Place Short Enough Here 63% 38% Chhatapur 30% 70% Supaul 25% 75% Bihar 5% 95% India 13% 87% -
Boron
PoorShort 56% Enough 44%
6 in 10 soil tests here came out short
If your field is short: mix 4 kg of borax per acre into the soil before sowing.
What this means
Needed for flowers to set seed and fruit.
Short under 0.5 ppm Enough 0.5 ppm or moreHealthy soil has 0.5 ppm or more.
Compared with the wider area Place Short Enough Here 56% 44% Chhatapur 16% 84% Supaul 11% 89% Bihar 38% 62% India 45% 55%
Fixes are the usual advice. Your Soil Health Card or nearest Krishi Vigyan Kendra gives the exact dose for your field.
Source: Soil Health Card – soil nutrient analysis (Ministry of Agriculture & Farmers Welfare). 2024-25. 16 samples.
Climate in Supaul
Rain
About 1,640 mm of rain a year
In a normal year. A dry year brings about 1,230 mm.
Temperature
Hottest in April: days about 35 °C, nights 22 °C
Coolest in January: days about 23 °C, nights 10 °C.
Typical of the district's villages; a farm much higher or lower can be a few degrees cooler or warmer.
Source: IMD gridded daily rainfall (0.25°); IMD gridded daily max/min temperature (1°); TerraClimate 1991–2020 temperature normals (about 4 km), where each district's villages are.