340-349 Flashcards Preview

science chapter 15 > 340-349 > Flashcards

Flashcards in 340-349 Deck (18)
Loading flashcards...
1
Q

soil texture

A

relitive poroportions of diffferent sized inorganic minerl particles of sand. silt, and clay

2
Q

sand

A

largest soil particles (0.05 to 2mm in diameter)

3
Q

silt

A

meddium sized particles (0.002 to 0.05 mm in diamiter)

4
Q

clay

A

small partilces (less than 0.002 mm in diamiter)

5
Q

ions

A

charged forms of soil minerals

6
Q

loam

A

ideal agricultural soil, combo of different soil particle sizes

7
Q

soil acidity

A

(pH) affects plants from nutrients mineral varies in deffernt Ph’s. optimum: 6.0 to 7.0

8
Q

soil taxamony

A

classification fo soils into 12 orders, and each order into many different series

9
Q

spodosols

A

from places with colder climats, amplle ercipitation, and good drainage. not food farmland because too acidic and nutrient poor because of leaching

10
Q

alfisols

A

from temperate decidiuos forsts.

11
Q

mollisols

A

from temperate, semiarid, and fertile soils. grows worlds grain crops

12
Q

aridosols

A

from arid regions of all continents. provides rangeland for grazing animals, crops may be grown if water is supplys for irrigation

13
Q

oxisols

A

low in nurtient minerals, exist an tropical and sub tropical areas with ample percipotation. thigs decompse very quickly

14
Q

substainable soil use

A

the wise use of soil resources, without a reduction in the amount of ertility in the soil, so that it is productive for future generaitons.

15
Q

soil erosion

A

the wearing away or remmoval of soil from the land

16
Q

soil erosion in the USA

A

water erosion is severe across the midwestern grain belt. soil erodes 25% quicker then natural processes can replace it

17
Q

salinization

A

gradual accumulation of salt in soil, often as a result of improper irragation methods

18
Q

desertification

A

degradation of once fertile rangeland, agriculteral land, or tropical dry forest into nonproductive desert