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DAILY NEWS ANALYSIS
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20 March, 2021
3 Min Read
|
|
Alluvial |
Black |
Red |
Forest |
Laterite |
Arid/ Desert/ Sandy |
Alkaline Usar/reh
|
Marshy/ Kari of Kerala |
|
% Spread |
45.6 |
16.6 |
10 |
8.6 |
8.5 |
4.32 |
_ |
_ |
|
Area (lakh km2) |
15 |
5 |
3.5 |
2.85 |
2.48 |
1.4 |
_ |
_ |
|
Deficient in |
P hm N |
K P hm N
|
Lime Mg P Hm N |
Lime P K low in bases N
|
leaching Lime Si Mg K P N |
Org N |
_ |
K P |
|
Rich in |
_ |
Bases Lime Ca, Fe Al, Mg Magnetite |
Al Si K(Some parts) |
Very rich in Humus High fertilizers needed. |
Fe Al Mn P(some parts) |
Soluble salts CaCo3 k |
Na Mg Ca Salts |
Org hm
|
|
Color |
_ |
Dark Grey to Black |
Red |
Light grey in dry areas Dark Brown in wet areas |
Red to reddish yellow |
Red to Brown |
Blue |
Black |
|
Texture |
Sandy loam to clayey |
clayey |
Sandy to clayey |
Coarse Gravels to fine loams and silts |
Soft when wet Hard and lumpy when dry |
Sandy to Gravely |
- |
Black Heavy |
|
PH |
- |
Neutral to Alkaline 7.2-8.5 |
Neutral to Acidic |
slightly acidic |
Acidic 5-6 |
Alkaline High PH |
Highly Alkaline >8.5 |
Highly Acidic |
|
States |
All States along rivers |
MH, MP, West AP southTN
northKA |
TN, KA, north east AP, East MP, BH, WB, RJ |
FOREST AREAS |
AP, KA, KR, MP, OD, AS, westMH |
RJ,HR,PN,GJ,TN,TL |
UP, PN, HR, RJ, KR, coastal OD, Sundarbans |
TN BH UP Kottayam, Alapuzha
|
|
Significance
|
Largest available soils
|
Self Ploughing High Moisture Retension |
- |
- |
Porous, Well drained, Less water holding capacity. |
Low water holding capacity soils |
Also called Black Alkali or Usar Soils |
Mostly Under Water, After rains Paddy is grown |
|
Crops grown |
Rice wheat vegetables fruits cotton jute |
Cotton Wheat Jowar Linseed Castor Sunflower |
- |
Spices, Wheat, Maize Temperate fruits
|
- |
Drought / Salt Tolerant Crops Barley, rape, Cotton, Millets, Pulses |
- |
- |
|
Other |
Khader -fertile alluvium and bhangar-older alluvium Bhabar -pebbly soil
|
Regur soil
|
- |
stony and infertile for the production of crops |
In regions of high Rain. Wet and dry spells |
Aeolian sand(90-95%) Clay(5-10%) |
Incrustation of salts on surface due to high evaporation Also called white alkali soil. |
Partially de- composed organic matter |
Some of the effects of soil pH on plant growth are:
Source: khullar
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