SOIL 3600 Lecture Notes - Lecture 29: Podzol, Soil Horizon, Soil Structure

• School: University of Manitoba
• Department: Soil Science
• Course: SOIL 3600
• Professor: Tee Boon Goh

Document Summary

If ah, not chernozemic: combined iron, aluminum and humus - leached. If occur together, bf below bhf: said otherwise in last lecture. Why is it important to be able to recognize podzols of any kind (3 types): high ph dependant cec, but they are acidic. Interpretation: if change in cec = cec[ph] - cec [soil, acidic ph] Salt - affected soils and formation of solonetzic soils. Plants will wilt: 3 kinds are recognized based on chemical and physical criteria, all 3 are problematic but some can be managed, they are: saline, sodic, saline soils. Important: this table summarizes properties of saline salts: electrical conductivity : ec, esp: Limit is 15% - if more than 15% suspect soil problem. Sodic soils: columnar structure problem, due to too much exchangeable na, does not have salinity problem. Saline-sodic soils: high osmotic pressure, due to salinity. Saline: high cec: high ec and high esp (> 4, > 15%) *give values.