Soil Science - important Question / Gase Paper 2024 Bsc Agriculture First semester || bsc agri 2024

Описание: Fundamentals of soil science First Semester
bsc agriculture first semester soil science gase paper important questions
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SSAC-111

Theory

Fundamentals of Soil Science

Soil as a natural body, Pedological and edaphological concepts of soil; Soil genesis: soil forming rocks and minerals; weathering, processes and factors of soil formation; Soil Profile, components of soil; Soil physical properties: soil-texture, structure, density and porosity, soil colour, consistence and plasticity, soil taxonomical classification and soils of India; Soil water retention, movement and availability; Soil air, composition, gaseous exchange, problem and plant growth, Soil temperature; source, amount and flow of heat in soil; effect on plant growth, Soil reaction-pH, soil acidity and alkalinity, buffering, effect of pH on nutrient availability; soil colloids inorganic and organic, siliente elays: constitution and properties; sources of charge; ion exchange, cation exchange capacity, base saturation;.


Study of soil profile in field. Study of soil sampling tools, collection of representative soil sample, its processing and storage. Study of soil forming rocks and minerals. Determination of soil density, moisture content and porosity, Determination of soil texture by feel and Bouyoucos Methods. Determination of soil pll and electrical conductivity. Determination of cation exchange capacity of soil.


Title of Topic

Soil as a natural body, Pedological and edaphological concepts of soil

Soil genesis: soil forming rocks and minerals classification

Weathering of rocks - Chemical, Physical and Biological

Factors of soil formation, fundamental and specific soil forming processes

Soil Profile
Definition and components of soil
Soil Physical properties- Soil texture, classifications of soil separates, importance

of soil texture, particle size analysis. Stoke's law

Soil structure and types of soil structure, mechanism of soil structure formation, management of soil structure.

Bulk density, particle density and porosity, factors affecting them, agricultural significance and manipulation

10. soil consistence and plasticity and their agricultural significance.

11. Soil colour and expression of soil colour with munsell soil colour chart

12. soil taxonomical classification and soils of India

13. Soil water classification, forces of soil water retention

Movement of soil water and availability to plants.

15. Soil air, composition, gaseous exchange and its composition, importance and in

plant growth

16. Soil temperature; source, amount and flow of heat in soil; effect on plant growth,

Soil reaction-pH, soil acidity and alkalinity, buffering

effect of pH on nutrient availability

19. Soil colloids, types of soil colloids and their significance

types of layer silicates, their structure and characteristics,

sources of charges on soil colloids. Cation and anion exchange phenomenon and factors influencing ion exchange, Base saturation

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