Plant Science 3

Front 1

_________ is a nitrogen fixing microorganism that forms a symbiotic relationship with legunes

Back 1

Rhizobium

Front 2

_____ is the process that converts nitrate into nitrogen gas

Back 2

dentrification

Front 3

iron deficiencey in plants often most easily prevent by adjusting soil _____

Back 3

PH

Front 4

when organic matter is added to soil its N is converted by the process of minerlization N form

Back 4

ammonium

Front 5

is one of the micronutrients

Back 5

Fe

Front 6

Immbila nutrients move up the plant by _______( in the xylem) transport

Back 6

acropetal

Front 7

a typical natural soul contains ______% organic matter

Back 7

1

Front 8

most plants will grow in a soil pH range of ______ bnut most plants have a narrower range of optimum pH

Back 8

5-7

Front 9

water that is left after gravity has removed as much as it can is called_____

Back 9

field capacity

Front 10

a vertical section of soul extending through all its horizons from the surface t o the plant is known as _____

Back 10

soil profile

Front 11

Roots secrete ______ to help them penetrate the soil

Back 11

mucilage

Front 12

mineral particles decrease in size in the following order _______

Back 12

sand>silt>clay

Front 13

when organic matter is added to soil , its N is converted by the process of mineralization to which N Form

Back 13

ammonium

Front 14

Calcium (Ca) is used by the plant as a component of _____ and _____

Back 14

cell walls, nitrogen assimilation

Front 15

Nitrogen (N) is used by the plants as a component of ________ and ______

Back 15

Chlorophyll and nucleic acids

Front 16

The principle forces that move water in an unsaturated soil are ______ and _______

Back 16

evaporation , capillary action

Front 17

Water is not responsible for which of the following functions in a plant

Back 17

warm the plant through insulation

Front 18

Manure has a low C:N ratio when farmers add manure to a field it _____ nitrogen availability in the soul

Back 18

increases

Front 19

the force of attraction between to like molecules (such as water and water) is called?

Back 19

Cohesion

Front 20

Water movement in the plants in primarily driven by

Back 20

Evapoation

Front 21

Water potential determines the direction that water flows. Water flows from _______ to ______ potential

Back 21

High, low

Front 22

_______ contain large quantities of soluble salts, typically chlorides/sulfates of Ca

Back 22

Saline solids

Front 23

What characteristic allows water to migrate through the soil profile via capillarity?

Back 23

Cohesion

Front 24

Water between field capacity and saturation is _______ because ______

Back 24

not available, it is lost through drainage

Front 25

from a physical standpoint ________ soil particles are structurally most simple

Back 25

Sand

Front 26

_____ can be added to acid souls to increase pH

Back 26

Dolomite

Front 27

_____ is the outer weathered layer of the earths crust

Back 27

Soil

Front 28

The ideal pH for field soil is

Back 28

6.5

Front 29

an example of plant that through a symbiotic relationship fixes atmospheric nitrogen is

Back 29

soybean

Front 30

_____ is the process that converts nitrogen gas to ammonium

Back 30

nitrogen fixation

Front 31

when salts are present in soil water they increase the water ______ of the soil and prevent water ______ by the plant

Back 31

potential uptake

Front 32

which of the following is not a factor in water movement through a soul profile

Back 32

centrifugal force

Front 33

Plants absorb mineral nutrients against a high concentration gradient by ______ trasport

Back 33

Active

Front 34

fertillizer is a salt too much fertilizer can burn a plant because

Back 34

the fertillizer reverses the osmotic balance the osmotic balance and extracts water from the plant

Front 35

_______ is the ability of soil to retain water

Back 35

water-holding capacity

Front 36

The force of attaction between to like molecules (such as water and water) is called ______

Back 36

cohesion

Front 37

______water is absorbed to soil particles when the soil becomes air dry and and all other liquid water is gone

Back 37

hygroscopic