Ch. 5: Soils & Soil Management Flashcards Preview

Horticulture Science 1 > Ch. 5: Soils & Soil Management > Flashcards

Flashcards in Ch. 5: Soils & Soil Management Deck (21):
1

soil

a complex, naturally formed material on the earth's surface derived from the disintegration of rocks and decomposition of organic materials; provides nutrients, moisture, oxygen and anchorage for plant growth and development; determines the composition and function of ecosystems

2

field capacity

moisture content after gravity has removed all water it can

3

soil profile

horizons (layers of parent material)

4

A Horizon

topsoil
"organisms doing their thing"

5

B/C Horizon

subsoil
higher in clay, build on this layer

6

parent material

bedrock

7

O-Horizon

surface

8

soil texture

size of particles that make up soil; percentage of sand, silt, and clay sized particles in soil

9

soil structure

the arrangement of the soil particles into secondary units/aggregates; clumps of soil particles that act as individual larger particles

the key to good structure; organic matter and thriving communities of soil organisms

10

pH

relative amounts of hydrogen and OH- ions present

11

cation

?

12

Cation Exchange Capacity

?

13

mulch

a material spread around or over a plant to enrich or insulate the soil

14

nitrogen drag

?

15

tillage

?

16

cultivation

?

17

fumigation

?

18

pasteurization

?

19

soil compaction

?

20

crusting

?

21

soil conservation

?