Chithamur

Nutrient by nutrient

• Nitrogen

  Poor
  Low 99% Medium 1%

  Almost every soil test 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/ha

  Healthy soil has 280 kg/ha or more.

  Compared with the wider area

  Place	Low	Medium	High
  Here	99%	1%	0%
  Chengalpattu	99%	1%	0%
  Tamil Nadu	99%	1%	0%
  India	64%	30%	6%

• Phosphorus

  Okay
  Low 42% Medium 27% High 31%

  4 in 10 soil tests here came out low

  If your field is low: add about a quarter more DAP or single super phosphate than the usual dose, at sowing.

  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/ha

  Healthy soil has 10 kg/ha or more.

  Compared with the wider area

  Place	Low	Medium	High
  Here	42%	27%	31%
  Chengalpattu	44%	25%	30%
  Tamil Nadu	21%	43%	36%
  India	14%	41%	45%

• Potassium

  Poor
  Low 52% Medium 41% High 8%

  5 in 10 soil tests here came out low

  If your field is low: add about a quarter more potash (MOP) than the usual dose.

  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/ha

  Healthy soil has 110 kg/ha or more.

  Compared with the wider area

  Place	Low	Medium	High
  Here	52%	41%	8%
  Chengalpattu	55%	37%	8%
  Tamil Nadu	11%	43%	46%
  India	14%	53%	34%

• Organic carbon

  Poor
  Low 77% Medium 13% High 9%

  8 in 10 soil tests here came out low

  If your field is low: add 4 tonnes of compost or farmyard manure per acre before sowing, and plough crop leftovers back in instead of burning them.

  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	77%	13%	9%
  Chengalpattu	84%	8%	7%
  Tamil Nadu	88%	9%	3%
  India	48%	28%	23%

• pH

  Good
  Acidic 1% Neutral 98% Alkaline 1%

  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 Alkaline

  Most crops do best at pH 6.5 to 7.5.

  Compared with the wider area

  Place	Acidic	Neutral	Alkaline
  Here	1%	98%	1%
  Chengalpattu	6%	93%	2%
  Tamil Nadu	2%	93%	5%
  India	12%	86%	2%

• Salt

  Good
  Not 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 Salty

  Under 1 dS/m is fine. Above 4 harms most crops.

  Compared with the wider area

  Place	Not salty	Salty
  Here	100%	0%
  Chengalpattu	99%	1%
  Tamil Nadu	98%	2%
  India	96%	4%

• Sulphur

  Okay
  Short 44% Enough 56%

  4 in 10 soil tests here came out short

  If your field is short: use single super phosphate instead of DAP, or add about 100 kg of gypsum per acre before sowing.

  What this means

  Makes oil in oilseeds and protein in pulses.

  Short under 10 ppm Enough 10 ppm or more

  Healthy soil has 10 ppm or more.

  Compared with the wider area

  Place	Short	Enough
  Here	44%	56%
  Chengalpattu	38%	62%
  Tamil Nadu	35%	65%
  India	24%	76%

• Zinc

  Okay
  Short 47% Enough 53%

  5 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 more

  Healthy soil has 0.6 ppm or more.

  Compared with the wider area

  Place	Short	Enough
  Here	47%	53%
  Chengalpattu	44%	56%
  Tamil Nadu	42%	58%
  India	35%	65%

• Iron

  Poor
  Short 84% Enough 16%

  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 more

  Healthy soil has 4.5 ppm or more.

  Compared with the wider area

  Place	Short	Enough
  Here	84%	16%
  Chengalpattu	80%	20%
  Tamil Nadu	39%	61%
  India	24%	76%

• Copper

  Good
  Short 5% Enough 95%

  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 more

  Healthy soil has 0.2 ppm or more.

  Compared with the wider area

  Place	Short	Enough
  Here	5%	95%
  Chengalpattu	5%	95%
  Tamil Nadu	3%	97%
  India	5%	95%

• Manganese

  Poor
  Short 79% Enough 21%

  8 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 more

  Healthy soil has 2 ppm or more.

  Compared with the wider area

  Place	Short	Enough
  Here	79%	21%
  Chengalpattu	67%	33%
  Tamil Nadu	28%	72%
  India	13%	87%

• Boron

  Poor
  Short 88% Enough 12%

  9 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 more

  Healthy soil has 0.5 ppm or more.

  Compared with the wider area

  Place	Short	Enough
  Here	88%	12%
  Chengalpattu	78%	22%
  Tamil Nadu	45%	55%
  India	45%	55%

Fixes are the usual advice. Your Soil Health Card or nearest Krishi Vigyan Kendra gives the exact dose for your field.

Climate in Chengalpattu

Villages in this block