test 3*

Question 1

abiotic systems are coused by

Answer 1

environment

Question 2

which bird has been reported to dramatically reduce corn stands

Answer 2

canada goose

Question 3

in corn birs couse

Answer 3

ear damage

Question 4

if brittle snap ocurs below the growing point at the v5 stage will corn recover

Answer 4

no

Question 5

what is the primary reason corn does not grow to its full potential

Answer 5

drought

Question 6

droughts affect the plants ability to take up

Answer 6

water nutrience

Question 7

in corn drought tolerance is influenced by 2

Answer 7

root structure and hybrid selectoin

Question 8

what is the most common syptom of drought in corn

Answer 8

leaf wraping

Question 9

what are two areas of the field that drought would happen the least

Answer 9

course soils
high topography

Question 10

what drought stress is the most critical yield on corn

Answer 10

tassling to silking

Question 11

what are 4 effects of drought in soybeans

Answer 11

reduced stands
seed dieing during germinatoin
leaf colour
leaf showing puckering

Question 12

how many essensial plant nutrients are there

Answer 12

17

Question 13

what three nutrients are never defitint

Answer 13

carbon hydrogen oxygen

Question 14

what are three macronutrients

Answer 14

nitrogen phospourus and potasium

Question 15

what are 8 micronutrients

Answer 15

boron
chlorine
cobalt
copper
iron
magnesium
molybenum
zinc

Question 16

what are three ways nutrients are lost

Answer 16

plant usage
leaching
irriversable chemical reactoins

Question 17

what three nutruents are less avalible at high soil ph

Answer 17

boron magnezium zink

Question 18

what three nutrients are less avalible on low ph soils

Answer 18

calcium
magnesium
molybendimium
sulfur

Question 19

organic matter can be a source of what two nutrients

Answer 19

nitrogen
sulfur

Question 20

which nutrient deficiency is more common in alfalfa under dry conditions

Answer 20

phosphorus

Question 21

which nutrient deficentcy in corn is more common during cold springs

Answer 21

zinc

Question 22

where do deficency symbtops of mobile nutrients first appear on the plant

Answer 22

old leafs

Question 23

what are six mobile nutreints

Answer 23

nitrogen
phosspherus
potsatium
magnesium
molybendium
chlorien

Question 24

where does deficentcys of inmobile desiese first apper

Answer 24

new growth

Question 25

what are seven immobile nutrients 6

Answer 25

boron calcium copper iron magnese zinc

Question 26

nutrient deficientcies with noticable feild patterns may be due to influence by 8

Answer 26

soil ph soil om soil type soil compactoin topography erosoin tile drains past managment

Question 27

what two nutrient deficences are common in organic soil

Answer 27

magnanese zinc

Question 28

what is a couse of low soil ph

Answer 28

aluminum toxicity

Question 29

what are seven affects of low ph on cereals

Answer 29

thickening of roots poor tillering wilted flattened prostrate stunted growth purpling of leafs reduced root system yeild loss

Question 30

what are two deficencys coused by compactoin

Answer 30

magneze and zinc

Question 31

severe erosoin can couse mixing of soils what are 3 deficenctd

Answer 31

boron magneze and zinc

Question 32

how do root rots couse nutrient deficiencys

Answer 32

restrict roots ability to absorb a nutrient

Question 33

what five factors will assist you in diagnosing nutrient deficiency

Answer 33

where in the plant colour change in the plant observe pattern in field get field history tissue test

Question 34

is nitrogen moble or inmoble

Answer 34

mobile

Question 35

where do nitrogen deficiencys first appear on the plant

Answer 35

older leafs

Question 36

what are five couses for nitrogen deficiency in corn

Answer 36

stunted spindly growth v shaped yellow orange at tips of leafs pale yellowish green thin weak stalks ears pinched at the tips

Question 37

what are five nitrogen deficiantcys in wheat

Answer 37

stunted growth reduced root mass small leaf size lower leaves turn yellow adverse effect in spikelet formatoin

Question 38

describe the phosphorus defincy in corn 1

Answer 38

purplish cast to the plant

Question 39

five couses for nitrogen deficencys in a plant

Answer 39

wet soil dry soil sandy soil low in om soil compacktoin high residue ties up nitrogen `

Question 40

describe Potasium deficency in alfalfa

Answer 40

small yellow dots

Question 41

what crop does boron deficency occur in

Answer 41

alfalfa

Question 42

what are four iron deffish in soybean

Answer 42

intervienal yellowing brown spects stunting brown leaf margins and plant death

Question 43

describe magnesium defficent in soybeans 2

Answer 43

intervienal areas pale green yellow viens remain green

Question 44

decribe sulfur deficent in wheat 3

Answer 44

overall pale and stunting lower leaves are pale greem upper leaves in advance stages change from yellow to white

Question 45

what crop does zinc deficency occur in

Answer 45

corn

Question 46

what couses fertilizer burn and 4 symptoms

Answer 46

fertilizer is placed to close to roots uneven emergence roots tur brown sime plants are afffected will othehrs are not poor germinatoin