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Growing medium

Material in which roots of plants grow

1

Edaphology

Deals with the influence of of soil and media on the growth of plants

2

Nutrients

What roots absorb from the medium and water

3

Anchor

Keeps the plant from falling over

4

Pore spaces

Air spaces between growing medium particles which allows oxygen to reach the plant roots

5

Soil amendment

Anything added to soil or applied to the surface to improve plant growth

6

Soil

Top few inches of the earths surface that provides plant growth

7

Soilless medium

No topsoil

8

Hydroponics

Method of growing plants where the nutrients are provided by a nutrient solution

9

Nutrient solution

Water and dissolved nutrient salts

10

Sand culture

Growing plants in sterilized sand with drop irrigation

11

Gravel culture

Irrigating plants grown in gravel for mechanical support

12

Bag culture

Uses a plastic bad filled with substrate such as Rockwell, peat lite, and sawdust. Drip culture is used

13

Aeroponic system

Plant roots suspended in the air with a fine mist of oxygen rich nutrient solution sprayed on them at regular intervals

14

Continuous flow system

Using shallow pools with flow panels containing plants floating at the surface

15

Nutrient film technique

Recirculating shallow stream of nutrient solution that moves through channels in which plants grow

16

Mineral materials

Come from organic sources

17

Organic matter

Decayed remains of plants and animals

18

Soil texture

Proportion of sand, silt, and clay

19

Soil structure

Physical arrangement of soil particles

20

Soil aeration

Movement of atmospheric air into the soil

21

Soil compaction

Occurs when soil is pressed into a relatively dense mass

22

Wear

Physical deterioration of of a plant community resulting from excessive traffic

23

Soil profile

Verticle section of soil at a particular location

24

Parent material

Unconsolidated mass of rock material or peat from which the soil profile develops

25

Thatch

Layer of organic residue above soil surface

26

Macronutrients

Most important nutrients in plant growth

27

Micronutrients

Essential for plant growth, need less than macronutrients

28

Soil tests

Determine what nutrients are present in the soil

29

Chlorosis

Yellowing of the green part of the plant