What the soil tests found
8
out of 10
- soil samples, 2023-24 & 2024-25
- 1,270
- 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
GoodLow 1% Medium 24% High 75%
Most soil tests here came out high
If your field is high: you can use about a quarter less urea than usual.
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 1% 24% 75% Lower Siang 1% 29% 71% Arunachal Pradesh 12% 74% 14% India 64% 30% 6% -
Phosphorus
GoodLow 4% Medium 55% High 41%
Almost every soil test here had enough
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 4% 55% 41% Lower Siang 4% 55% 41% Arunachal Pradesh 11% 67% 22% India 14% 41% 45% -
Potassium
GoodLow 13% Medium 81% High 7%
1 in 10 soil tests here came out low
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 13% 81% 7% Lower Siang 13% 81% 6% Arunachal Pradesh 20% 65% 15% India 14% 53% 34% -
Organic carbon
GoodLow 6% Medium 9% High 85%
Most soil tests here came out high
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 6% 9% 85% Lower Siang 7% 11% 82% Arunachal Pradesh 18% 47% 35% India 48% 28% 23% -
pH
PoorAcidic 86% Neutral 14%
9 in 10 soil tests here came out acidic
If your field is acidic: add agricultural lime before sowing. A soil lab works out how much your field needs.
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 86% 14% 0% Lower Siang 86% 14% 0% Arunachal Pradesh 51% 49% 0% India 12% 86% 2% -
Salt
GoodNot salty 100%
Almost no 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 100% 0% Lower Siang 100% 0% Arunachal Pradesh 97% 3% India 96% 4% -
Sulphur
GoodShort 3% Enough 97%
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 3% 97% Lower Siang 2% 98% Arunachal Pradesh 23% 77% India 24% 76% -
Zinc
OkayShort 21% Enough 79%
2 in 10 soil tests here came out short
If your field is short: mix 10 kg of zinc sulphate per acre into the soil before sowing. One dose lasts two or three seasons.
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 21% 79% Lower Siang 17% 83% Arunachal Pradesh 9% 91% India 35% 65% -
Iron
GoodShort 13% Enough 87%
1 in 10 soil tests here came out short
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 13% 87% Lower Siang 12% 88% Arunachal Pradesh 12% 88% India 24% 76% -
Copper
GoodShort 8% Enough 92%
1 in 10 soil tests here came out short
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 8% 92% Lower Siang 8% 92% Arunachal Pradesh 5% 95% India 5% 95% -
Manganese
OkayShort 31% Enough 69%
3 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 31% 69% Lower Siang 29% 71% Arunachal Pradesh 17% 83% India 13% 87% -
Boron
PoorShort 81% Enough 19%
8 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 81% 19% Lower Siang 78% 22% Arunachal Pradesh 23% 77% 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). 2023-24 & 2024-25. 1,270 samples.
Climate in Lower Siang
Rain
About 2,710 mm of rain a year
In a normal year. A dry year brings about 2,230 mm.
Temperature
Hottest in August: days about 33°, nights 25°
Coolest in January: days about 24°, nights 10°.
Averages for an area about 100 km across; hills and valleys can differ by several degrees.
Source: IMD gridded daily rainfall (0.25°); IMD gridded daily max/min temperature (1°).