introduction about acidic soil and area distribution ,classification of acidic soil and source of acidic soil formation , characteristic of acid soil ,what are the impact on soil properties . Reclamation of acid soil , conclusion about acidic soil

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2. Acidic soil
Name Deen Dayal Chaudhary
Class :- BSc . Agriculture 2nd year
Roll No. :- 1929150
Subject :- problematic soil and their management
Subject code :- BSAG-4040-19
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3. content
• Introduction
• Classification of acid soil
• Sources of acid soil formation
• Impact on soil property
• Characteristics of acid soil
• Management of soil acidity
• Conclusion
• Reference
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4. Introduction
• Soil with low pH contain relatively high amounts of exchangeable H+ & Al
3+considered as the acid soil.
• Soil system’s proton donating capacity during its transition state to a reference state.
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5. Area distribution of acid soils in India
• Total area -49 million ha.
• M.P. Is 1st state
• And maharashtra is 2nd
• 28 % of total geographical area
• 26 million hactares area has ph < 5.6
• 23 million hectare area has ph range 5.6-6.5
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6. Classification of acidic soil
•Ultra acidic : 3.5
•Extremly acidic : 3.5 to 4.4
•Very strong acidic: 4.5 to 5.0
•Strong acidic : 5.1 to 5.5
•Moderately acidic: 5.6 to 6.0
•Slightly acidic : 6.1 to 6.5
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7. Sources for formation of acidic soil
• Rain fall
• Parent materials
• Fertilizer application
• Decomposition of organic matter
• Vegetation cover
• Human interference
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8. Characteristics of Acid soil
Physical
• Light texture soil
• High permeability
• Poor water holding capacity
• Poor cation exchange capacity
• Poor organic matter content
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9. Chemical
• Base unsaturated soil
• More anions than cations.
• Active and potential soil acidity.
• Toxic effects of Al concentration more.
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10. Impact on soil properties
• Physical
• Chemical
• Biological
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11. Physical
• Reduced vegetation
• Soil losses due to water & wind erosion
• High rainfall events Drought
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12. Chemical
• Low pH
• More anion fixing capacity
• High percentage of base unsaturation
• Decrease the availability of P
• Aluminium toxicity is more
• Ca, Mg levels are decreased – deficiency occur
• Restriction of nitrogen fixation in legume
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13. Biological
• Reduced growth of beneficial organisms.
• Change in the microbial decomposition processes
• Decreasing the survival of native vegetation.
• Reduced organic matter decomposition
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14. Reclamation of acid soils
• Liming
• Lime is recommended for reclaiming acid soils
• Applied once in five years
Different liming material to reclamation of acid soil
• Oxides - CaO
• Hydroxides - Ca(OH)2
• Carbonates - CaCO3
• Silicate of calcium - CaSiO
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15. Choice of crops
• Rice
• Millets
• Oats
• Groundnut tea potato
• This crop can be grown on acid soils
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16. Soil fertility management
• Leaching looses
• Use of completely water soluble source of fertilizer
• Potassium sulphate is preferred over murate of potash
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17. conclusion
• Soil acidity is a serious problem in agricultural land
• We improve soil health – practice various management practices
• Based on soil test value recommend the fertilizer
• Judicious application of nitrogenous fertilizer
• To advice the farmer should know about soil test technology
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18. Reference
 https://www.soilmanagementindia.com/soil-acidity/acid-soil-distribution
 https://en.wikipedia.org/wiki/Soil_pH
 https://www.slideshare.net/AbhilashPanju/acid-soil-and-their-management
 http://www.kiran.nic.in/pdf/Extra/acid_soils.pdf
THANK YOU
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