Acidic soil

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

1. 06-06-2021 1

2. Acidic soil Name Deen Dayal Chaudhary Class :- BSc . Agriculture 2 nd year Roll No. :- 1929150 Subject :- problematic soil and their management Subject code :- BSAG-4040-19 06-06-2021 2

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 06-06-2021 3

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. 06-06-2021 4

5. Area distribution of acid soils in India Total area -49 million ha. M.P. Is 1 st state And maharashtra is 2 nd 28 % of total geographical area 26 million hactares area has ph < 5.6 23 million hectare area has ph range 5.6-6.5 06-06-2021 5

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 06-06-2021 6

7. Sources for formation of acidic soil Rain fall Parent materials Fertilizer application Decomposition of organic matter Vegetation cover Human interference 06-06-2021 7

8. Characteristics of Acid soil Physical Light texture soil High permeability Poor water holding capacity Poor cation exchange capacity Poor organic matter content 06-06-2021 8

9. Chemical Base unsaturated soil • More anions than cations. • Active and potential soil acidity. • Toxic effects of Al concentration more. 06-06-2021 9

10. Impact on soil properties Physical Chemical Biological 06-06-2021 10

11. Physical Reduced vegetation Soil losses due to water & wind erosion High rainfall events Drought 06-06-2021 11

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 06-06-2021 12

13. Biological Reduced growth of beneficial organisms. Change in the microbial decomposition processes Decreasing the survival of native vegetation. Reduced organic matter decomposition 06-06-2021 13

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 06-06-2021 14

15. Choice of crops Rice Millets Oats Groundnut tea potato This crop can be grown on acid soils 06-06-2021 15

16. Soil fertility management Leaching looses Use of completely water soluble source of fertilizer Potassium sulphate is preferred over murate of potash 06-06-2021 16

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 06-06-2021 17

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 06-06-2021 18