1
Q
R1
A
Silk
2
Q
R2
A
Blister
3
Q
R3
A
Milk
4
Q
R4
A
Dough
5
Q
R5
A
Dent
6
Q
R6
A
Black layer
7
Q
Corn has __ emergence
A
hypogeal (cotyledon is belowground at emergence)
8
Q
valuable specialty direct to consumer crop
A
sweet corn
9
Q
heirloom, older crop
A
flint
10
Q
Nitrogen deficiency
A
yellowing along the midrib
11
Q
Phosphorus deficiency
A
red and purplish color leaves
12
Q
Potassium deficiency
A
yellowing around the margarin
13
Q
Critical range for corn
A
50-86 degrees
14
Q
GDD Equation
A
((Daily Max + Daily Min)/2) - 50
15
Q
VE stage in soybean emergence
A
Cotyledons are pulled above soil
16
Q
V1 stage in soybeans emergence
A
first trifoliate leaves are fully unrolled and edges are no longer touching
17
Q
VC stage in soybeans emergence
A
first unifoliate leaves unroll
18
Q
R1/R2 stage in soybeans
A
Beginning/Full flower
19
Q
R3/R4 stage in soybeans
A
Beginning/Full Pod
20
Q
R5/R6 stage in soybeans
A
Beginning/Full Seed Development
21
Q
R7/R8 stage in soybeans
A
Beginning/Full Maturity
22
Q
vegetative growth continues after reproductive flowers
grown in the north
A
indeterminate varieties
23
Q
lower, earlier maturing groups (00,0,1,2)
A
Northern climates
24
Q
higher, later maturing groups (4+)
A
southern climates
25
unhealthy vs healthy nodules
unhealthy - gray/white/green
healthy - pink
26
how do aphids feed on plants
piercing-sucking mouthparts
insert their mouthparts into plant stems, leaves, or buds to suck out sap.
27
how do grasshoppers feed on plants
vegetative
use their chewing mouthparts to tear and grind plant tissue
28
What conditions would soybean seedlings grow slowly?
cold or waterlogged soils
29
soybean flower development is most greatly influenced by what
day length (photoperiod)
temperature
soil conditions
water
30
required cold period for reproduction in winter wheat
vernalization
31
Feekes 10.1-10.5 through 10.5.4
heading and flowering
32
Feekes 11.1 through 11.3
grain filling
33
Feekes 11.4
Ripening
34
pathogen for wheat streak mosaic virus
viral
35
pathogen for tan spot
fungal
36
pathogen for stem rust
fungal
37
fusarium head blight
fungal
38
infected fusarium head blight
shriveled kernels
pink kernels
39
durum wheat is used to make
pasta
40
wheat quality
uniform color and shape
no yellow berries
no shriveled/pink kernels
no broken kernels or foreign material
41
When would you harvest the highest quality of alfalfa?
late bud to early bloom stage
42
When would you harvest the highest tonnage silage?
black layer
43
Why is it important to pack and seal silage properly?
to maximize the anaerobic fermentation of sugars into lactic acid
44
What pH is best for silage?
between 3.8 and 4.2
45
What soil nutrient do forages require in large quantities?
Nitrogen, Phosphorus, Potassium
46
Autotoxicity on new alfalfa seedlings
Affects root development
reduce seedling roots
swell root tips
reduces root hairs and take up less water
47
Why is drought stressed corn a concern for chopping silage?
higher nitrates - livestock
higher moisture than expected in stalks
48
Pulse crops:
chickpeas, lentils, dry beans
49
What is a desirable quality for cooking oils?
long shelf life
minimal processing
healthy oil content
high smoke point
50
sunflowers with what are higher oil content
high oleic sunflowers have monosaturated fats
51
What kind of oil and linen are made from flax?
Linseed oil
flaxseed oil
52
Growth stages for wheat
seeding - tillering - stem extension - heading - ripening
53
Sequence for corn reproductive stages
Silking - Blister - Milk - Dough - Dent - Physiological Maturity
54
What statement is true regarding soybeans with an indeterminate growth pattern?
Vegetative growth overlaps with reproductive growth
55
Why is it important to scout for fusarium head blight?
FHB can produce mycotoxins which are dangerous to humans and livestock
56
Packing and sealing silage properly is important for maintaining high quality feed during storage because
excludes oxygen
57
How does autotoxicity affect alfalfa seedlings?
Stunts new alfalfa seedlings and prevents their establishment
58
During the ensiling process, sugars are converted to _____ and the pH reaches ____ during the anaerobic phase.
lactic acid, 4 pH
59
What is a concern with drought stressed corn if planning to chop it for silage?
High nitrates; could harm livestock
60
Which sunflower is preferred for cooking oil by the food processing industry?
NuSun
61
Flax can be used to make which kind of textile?
Linen
62
Which fatty acid is monounsaturated and makes a high-quality cooking oil?
oleic
63
What is a desirable quality for cooking oil?
high smoke point temperature
64
Which statement is true about producing specialty crops such as lentil or safflower?
Meeting food grade quality standards is important for favorable contract prices
65
Why can corn survive frost at the V1 growth stage?
Hypogeal emergence means growing point is belowground at V1
Fall2025
flashcards
Decks in class (27)
# Cards
-
Crop Pro Lab Exam59
-
BIO101LExam30
-
Crop Lab Midterm104
-
-acea10
-
BIO 2 Exam57
-
Crop Exam 243
-
BIO3Exam71
-
Crop Lab Final65
-
BIOL Exam 240
-
Strong Acids6
-
Crop Exam 340
-
Bio Exam 457
-
Chemistry Equations31
-
Final Exam63
-
AS101 Term40
-
Farm & Ranch Exam 116
-
ASExam229
-
Beef7
-
Swine7
-
Sheep7
-
Goat11
-
AS Exam217
-
Soils79
-
Farm & Ranch47
-
ASExam330
-
ASExam3.550
-
PRAG Exam 244
