New Update Syllabus of CST-302: SOIL SCIENCE III
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| Syllabus of Soil Science-302.https://cststudy.blogspot.com/ |
B.Sc.Ag. (Hons) Part-IIITHEORY COURSES
CST-302: SOIL SCIENCE III
Soil Chemistry and Microbiology
1.Soil reaction: Soil pH, forms of H± ion in soil, grading of soil according to pH values, sources or causes of soil acidity, role of pH on nutrient availability, problems of soil acidity. Acid sulphate soil--formation, location and extents in Bangladesh, classification, characteristics and management.
2. Liming: Principles of liming reactions, factors affecting liming reactions, kinds of liming materials, efficiency of liming materials, neutralizing index, chemical reactions between liming materials and acid soils, lime requirement and liming factors, methods of appling, lime balance sheet, effect of overliming, and role of lime on soil properties. Some problems about estimating lime requiments.
3. Soil colloids and clay mineralogy: Nature and important Properties of soil colloids, types of soil colloids; concept of silicate Clays, structure of layer silicate clays—structural units; 1:1type, types and 2:2 types of mineral, comparative properties of important silicates clays. Concept of buffering capacity of soil.
4. Ion exchange: Definition, caption and anion exchange, origin, Ion exchange, causes of negative charge on soil colloids, CEC, BSP and milliequivalent, factors affecting C.EC and CEC. Factors affecting and importance of anion exchange. Concept of contact exchange and root CEC.
5. Submerged soils: Definition, kinds, difference between aerated and sub-merged soils, characteristics of submerged soil, Redox potential and factors affecting redox potential, sequentionai reduction reactions, transformation of N, P, K, S, Fe and Zn; C. formation and impact on environment.
6. Saline and alkaline soils: Saline soil—definition, characteristics, formation, classification, location and extents, management of saline soils; saline tolerance crops. Alkaline soils—definition, properties of alkaline soils, concept of calcareous soils, and management of alkaline soils.
7. Soil organisms: Classification; concept of Protista, Procarotes and Eucariotes; classification of Bacteria and Algae; occurrence and functions of Bacteria, Fungi, Algae, Protozoa and Earthworms. Concept on Mycrrhizal Symbiosis.
8. Biological Nitrogen Fixation (BNF): Definition, agents, symbiotic and non symbiotic N-fixation. Legume-rhizobium symbiosis, cross inoculationgroup and legume crops. Azolla-anabaena symbiosis, importance and limitations in Bangladesh. Blue-green algae (BGAFecology, Physiology, importance and methods of production. Factors affecting Azolla and BGA growth.
