Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
77 Cards in this Set
- Front
- Back
|
Name 3 chemical herbicide families. |
triazine, imidazolinone, and phenoxy |
|
|
Pesticide labeling,registration and storage guidelines are all provisions of_____________. |
FIFRA |
|
|
A description of the influence of soil acidity upon the effectiveness of herbicides is: |
effectiveness can be reduced as acidity increases |
|
|
___________ is the joint action of 2 or more pesticides that is greater than the sum of either independently. |
synergism |
|
|
The most common seedling disease pathogens in the southeast are ____________. |
rhizoctonia and pythium |
|
|
Soils with high OM would _________ the performance of preemergence herbicides. |
decrease |
|
|
___________ weather conditions promote herbicide carryover to next season. |
cool and dry |
|
|
Soybeans that have dark reddish brown to black water soaked lesions on the hypocotyls have ________. |
phytophthora |
|
|
Soybean plants that have angular to somewhat circular red/brown spots on the lower trifoliate leave are most like likely to be in the early stages of ___________. |
septoria leaf spot |
|
|
__________ is the nozzle type best suited for applying a band application for herbicide over furrow |
even flat fan |
|
|
___________ is the nozzle type best suited for making high volume, thorough coverage of foliage when applying fungicides. |
hollow cone |
|
|
A weed management program that relies on total postemergence weed control with herbicides would most likely be successful if used with _______ and __________. |
careful scouting and proper timing |
|
|
A disadvantage of most preemergence herbicides is that they: |
will require approximately .5 inches of irrigation or rain for optimum activity |
|
|
Fall pancium has a _______ life cycle. |
annual |
|
|
For control of soybean cyst nematode, which IPM method would be the most likely to result in long term effectiveness? |
crop rotation |
|
|
The three most important groups of microorganisms are: |
actinomycetes,bacteria, and fungi |
|
|
The peak evapotranspiration rate for corn in the southeast is |
0.35 inches/day |
|
|
Name the elements essential for plant growth |
King Nick Came Close But Princess Nicky Sold More Cupcakes |
|
|
A nutrient can become immobilized in soil when |
P applied in highly acidic or alkaline soil |
|
|
_______________ is a process whereby nutrients are released from decomposing materials. |
soil mineralization |
|
|
What form is nitrogen absorbed by the plant? |
NO3- or NH4+ |
|
|
K deficiency of sweet corn is normally expressed on leaves as ________. |
marginal burn on edges of older leaves |
|
|
The micronutrient most often needed for legumes such as alfalfa is______. |
Boron |
|
|
Symbiotic N fixation is common with __________. |
legumes |
|
|
The desirable soil temperature at planting depth neeeded for corn germination is _________- |
65 degrees |
|
|
Long term excessive use of poultry manure can result in very high soil test levels for ________ |
phosphorus |
|
|
An example of a leaf feeder that is primarily a pest of legumes is ________ |
Mexican leaf beatle |
|
|
Rust spots on small grains are known as________ |
pustules |
|
|
Sucking insects, such as aphids, can excrete a sticky substance on a leaf known as __________. |
Honeydew |
|
|
Using 2 or more genes in GMO crops to gain specific insect control is called___________. |
stacking |
|
|
The trade name of a product used to enhance the update of soil P is ________ |
Avail |
|
|
__________ is a cation in the soil. |
K |
|
|
_______ is the nutrient that regulates stomatal openings in plants |
K |
|
|
What is the chemical uptake form of potassium? |
K+ |
|
|
Chelates are commonly used to increase the availability of ___________. |
Fe- Iron |
|
|
__________ are the least available source of nutrients. |
Soil minerals |
|
|
When a plant nurtient is absorbed with water that is moving to and into the plant root, the nutrient uptake process is called__________. |
mass flow |
|
|
___________ is more mobile in a flooded soil than in an upland soil. |
manganese |
|
|
Denitrification is the conversion of __________ to gaseous forms like dinitrogen and oxides of nitrogen |
nitrate |
|
|
___________ is the best measure of plant available phosphorus in a soil. |
soil test phosphorrus |
|
|
The depth of sampling no- till soil vs. conventional till is: |
shallower |
|
|
__________ can be used to compliment soil testing in determining nutrient deficiencies. |
tissue testing |
|
|
_____________ is the common method used to apply fertilizers to pastures. |
top dressing |
|
|
What is the most common form of potassium fertilizer? |
KCL |
|
|
Name 1 advantage of a crop rotation over monoculture systems. |
Risk spread across more than one commodity |
|
|
A double cropping system is where 2 crops are grown in the same field over ___________ months |
12 |
|
|
Pesticide carryover is most important in _________ crops |
rotational |
|
|
Starter fertilizer is commonly recommended for ___________ soil |
no-till |
|
|
Offspring of two plants which differ genetically are __________- |
hybrids |
|
|
___________ usually most important when selecting a variety of planting. |
yield potential |
|
|
____________ is a characteristic of a well designed field trial |
replicated strips |
|
|
Seed quality is highest for seed stored under____________.
|
low temperature and high humidity |
|
|
__________ is the most important kid of acidity in determining lime rate |
residual |
|
|
The most responsive lime would pass through a 10 or 60 size mesh? |
60 |
|
|
_________ is commonly used to make P based recommendations |
P index |
|
|
__________ is the nitrate loss pathway of most concern. |
leaching |
|
|
___________ is thee phosphate loss pathway of most concern in recently tilled soils. |
erosion |
|
|
In the standard germination test, viable seed ______________. |
germinate |
|
|
Advantages of starter fertilizer include_______-. |
more vigorous stand |
|
|
In many crops, night length is important in triggering _______--. |
flowering |
|
|
A crop should be replanted when stand is lost due to some stress, when |
it is economically justified |
|
|
When diagnosing a crop production problem in the field, you should compare__________. |
damage with normal area |
|
|
_________ is used to apply fertilizers, pesticides, and seeds at different rates. |
VRT |
|
|
Sandy soils have greater _________ than clay soils which can affect yield. |
drought susceptibility |
|
|
__________ is the harvest condition that is most likely to reduce seed quality. |
rain-dry cycles |
|
|
Identity-preserved (IP) crops are _______. |
kept separate from other varieties of the same crop. |
|
|
__________ is the most important factor in maintaining crop quality during storage. |
Use of fungicides to prevent mold |
|
|
_______ will most likely damage corn kernels. |
improper thresher speed |
|
|
crop mix on a farm is used to reduce _______. |
risk |
|
|
The type of soil structure that can most detrimental to root development is __________. |
platey |
|
|
A type of soil erosion that describes rapid particle movement along the soil surface is simply named______________ erosion. |
surface |
|
|
Geologic formations that are capable of storing and transmitting ground water are known as geologic __________. |
aquifers |
|
|
The human health hazard called "blue baby" syndrome results from drinking water with more than 10 ppm of ____________. |
nitrate nitrogen |
|
|
The different kinds of water erosion are called __________. |
sheet, rill, gully |
|
|
Type of __________ and ____________ are major factors that cause CEC to vary in soils. |
Clay and organic matter |
|
|
Crop residues are decomposed by microorganisms in order to obtain___________. |
carbon |
|
|
A _________ soil contains sufficient soluble salt to impair plant growth |
saline |
