Soils and Fertilizers Dr Hendricks Quiz 1

Pedology

The study of soil formation and classification

what are the two questions pedology tries to answer?

how does it form, what is it made of

what did V.V. Dokuchaev do

father of pathology, made an early classification system

what did Hans jenny do

Published factors of soil formation (1941), developed the five soil forming factors

What is a pedon

the smallest soil body, section of soil that extends to the root depth

typical size of a pedon

1m x 1m x 1.5m

define polypedon

a collection of similar pedons across a landscape

what is the acronym for the five soil forming factors

CLORPT

what are the five soil forming factors

Climate, organisms (biota), relief, parent material, time

whats parent material

rock + weathering

what are the three types of rock for parents material

Igneous, sedimentary, metamorphic

the main processes of weathering

physical and chemical

three types of physical weathering

erosion, frost wedging, root wedging

four types of chemical weathering

dissolution, hydrolysis, hydraytion, oxidation reduction