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Crops Test
Crops Test 2010
| Question | Answer |
|---|---|
| Nitrogen deficiency is first detected in the older leaves because a. nitrogen is so important to plant growth b. nitrogen is affected by compaction of the soil c. nitrogen is a mobile element d. nitrogen is an immobile element | nitrogen is a mobile element |
| Soil sampling should not be conducted : a. if rain is expected b. if tillage is going to be done c. if the soil is too warm d. if the soil is frozen | if the soil is frozen |
| Band applications of phosphorus (P) and potassium (K): a. should always be used b. always result in the highest yield c. concentrate nutrients for rapid growth d. often harm seed | concentrate nutrients for rapid growth |
| A nutrient has greater potential to move into groundwater on a soil with: a. high organic matter content,such as a muck soil b. high sand content,such as a sandy soil c. high clay content, such as a clay loam soil d. high silt content | high sand content, such as a sandy soil |
| Phosphorus will not move a great deal in soil because: a. it is a cation and reacts with organic matter b.it is a cation and reacts with sand c.it is an anion and reacts with calcium, iron, aluminum d. it is always applied at low rates | it is an anion and reacts with calcium, iron, aluminum and clay surfaces |
| Soil pH is a measure of: a. amount of water found in soil b. acidity in soil c. alkalinity in soil d. acidity or alkalinity in soil | acidity or alkalinity in soil |
| Depth of fertility soil sampling should: a. be at least three feet b. stay in the top two inches of the soil c. reflect depth of tillage d. vary according to the amount and type of fertilizer | reflect depth of tillage |
| Potassium is held in soil: a. by binding to electrical charges on/in minerals and clays b. by binding to cobalt c. by binding to soil microbes d. by binding to the soil solution | by binding to electrical charges on/in minerals and clays |
| Which of the following should be considered when crediting nitrogen from animal waste? a. cost of hauling the waste b. particle size of the waste material c. the type of animal producing the waste d. the temperature of the waste | the type of animal producing the waste |
| Which of the following crops would use the most nitrogen during the growing season? a. corn –grain (120 bu/Acre) b. sorghum – grain (90 bu/acre) c. alfalfa – 6 dry tons per acre d. wheat – grain + straw (70 bu/acre + 2 dry tons/acre) | alfalfa - 6 dry tons per acre |
| Which of the following stages of wheat growth comes first in the development of a wheat plant? a. soft dough b. tiller stage c. first node appears d. flag leaf stage | tiller stage |
| Which of the following species is a biennial? a. common dandelion b. soybean c. johnsongrass d. wild carrot | wild carrot |
| If a V2 sweetcorn plant has the top eaten by a deer, how does it continue to grow? a. axillary buds b. growing point was below ground c. it does not grow back. d. rhizomes | growing point was below ground |
| What role do rhizobia bacteria play in white clover plant development? a.fix nitrogen from the air and make it available to the plant. b.loosen soil to allow for better root development c.provide more axillary buds d.prevent worms from feeding on ro | fix nitrogen from the air and make it available to the plant |
| What role does nitrogen play in a plant? a. it is a primary component in cellulose. b. it is a part of lignin in the plant. c. it is a major component of chlorophyll. d. it is a primary compound in sugars. | it is a major component of chlorophyll |
| In rice production, which of the following leaves is most important to grain fill? a. the flag leaf b. all leaves are equally important c. leaves produced while tillering d. none of the above | the flag leaf |
| Which of the following has a panicle inflorescence? a. alfalfa b. Kentucky bluegrass c. rye d. morninglory | Kentucky bluegrass |
| On a grass plant which part is the clasping part that holds the leaf to the stem? a. ligule b. apical meristem c. auricle d. root | auricle |
| In corn production at which growth stage does the plant need the most water? a. VT b. VE c. V5 d. all stages need the same amount of water | VT |
| The part of the seed that is food for the embryo is called the a. radicle b. plumule c. endosperm d. hilum | endosperm |
| The movement of a pesticide downward through the soil profile in to the groundwater is called a. drift b. runoff c. leaching d. denitrification | leaching |
| Your tomato plants are twisting toward the ground and dying. Which of these type of herbicides most likely caused this damage? a. cell membrane disrupter b. growth regulator c. pigment inhibitor d. amino acid inhibitor | growth regulator |
| When looking at the Counter 5G label, what does the G stand for? a. dry flowable b. flowable c. granular d. bait | granular |
| You are doing an application of Balance Pro prior to planting your corn crop. Your nozzles are 40 inches apart. Your speed is 5.0 MPH. You are applying 10 gallons of spray per acre. What is your nozzle output? a .45 GPM b .50 GPM c .34 GPM d .15 G | .34 GPM |
| A herbicide application made before the crop or weeds emerges is: a. a postemergence application b. a preemergence application c. a post-banded application d. an off-label application | a preemergence application |
| Rainfall is needed after a preemergence application to: a. drop the rate of microbial activity b. move the herbicide into the weed germination zone c.decrease the rate of chemical hydrolysis d.decrease the chance of herbicide movement into ground w | move the herbicide into the weed germination zone |
| Certain genetic lines of corn and soybeans have been genetically modified to be tolerant to what commonly used herbicide: a. Dual II Magnum b. Banvel c. Roundup d. Callisto | RoundUp |
| The reason for adding liquid fertilizer solution to pesticide applications is to: a optimize pesticide’s activity b aid in the penetration and absorption of the pesticide c aid in the translocation of the pesticide to the active site d.all of the a | all of the above |
| You are doing a banding application of a pesticide to your onions. Your band width is 12 inches. Your nozzles are 34 inches apart. Your speed is 5.0 MPH. You are using 10 gallons per acre. What is your nozzle output? 0.10 GPM 0.38 GPM 0.15 GPM 0.25 | 0.10 GPM |
| Weeds such as nightshade are hard to control in crops like tomato because: a. they are herbicide resistant b. they are in the same family c. tomato closes canopy quickly d. nightshade grows faster | they are in the same family |
| Corn mushroom (smut) is considered a delicacy in some cultures. What causes this disease? a. fungi b. virus c. bacteria d. herbicide | fungi |
| Johnsongrass is a problem weed that spreads by rhizomes. Which of these methods would best control this weed? a. plowing b. cultivation c. spring applied fungicides d. fall applied herbicides | fall applied herbicides |
| Which of the following weeds contains alkaloids that can cause hallucinations or death if ingested? a. dandilion b. jimsonweed c. wild carrot d. pigweed | jimsonweed |
| Barley yellow dwarf is caused by a. virus b. bacteria c. fungi d. pollution | virus |
| Which of the following insects is naturally pollinates crops such as cucumber, watermelon, and cantaloupe? a. grasshopper b. gypsy moth c. honey bee d. corn earworm | honey bee |
| Wheat flour that came from storage has small black insects in it. Which of the following insect is most likely to be the problem? a. Colorado potato beetle b. saw-toothed grain beetle c. alfalfa weevil d. flea beetle | saw-toothed grain beetle |
| This disease spreads by water splash and causes problems with water uptake in the plant as it grows in the vascular tissue. The cause is most likely a a. virus b. nematode c. bacteria d. fungi | bacteria |
| Which of the following insects has a gel-like body? a. aphid b. spidermite c. bean leaf beetle d. Colorado potato beetle | aphid |
| Which of the following insects serves as a vector for Stewart’s wilt on sweet corn? a. seed corn beetle b. lady beetle c. flea beetle d. armyworm | flea beetle |
| The foliage is covered with white spots. With close inspection the spots appear powdery. Which of the following most likely caused the problem? a.white grubs b.bacterial wilt c.powdery mildew d.herbicide damage | powdery mildew |
| Weeds are a problem year after year because: a. weeds can grow in all soil temperatures b. weeds can grow in any soil pH c. the seed can be dormant in the soil d. weeds are resistant to most herbicides | the seed can be dormant in the soil |
| A recognizable compaction layer in a field is often called: a. cleachy material b. a plow pan c. a drill pan d. a cultivation pan | a plow pan |
| A systemic fungicide: a. does not move in the plant b. moves throughout the plant c. only moves in the roots of the plant d. only moves in the plant stem | moves throughout the plant |
| Which of the following is a way to prevent pesticide resistance? a.discourage natural predators b.use pesticides with a single site of action c. use the same pesticide on the same pest year after year d. rotate pesticides with different modes of ac | rotate pesticides with different modes of action |
| Your soil test recommends 85 pounds of nitrogen per acre applied to your 75 acre canola oilseed crop. How much 36-0-0 do you need to apply per acre to meet the recommendation? a. 236 lbs. b. 200 lbs. c. 20,708 lbs. d. 36 lbs | 236 lbs |
| Cropping systems can modify soil structure by: a. increasing root activity b. protecting the soil from erosion c. adding organic matter d. all the above | all of the above |
| Most soil compaction results from: a. excessive freezing and thawing b. use of too many fertilizers and chemicals c. driving on or tilling wet ground d. driving on or tilling dry ground | driving on or tilling wet ground |
| Reduced root growth and poor water and nutrient uptake may indicate: a. warm soil temperatures b. poor soil tilth c. soil compaction d. high water table | soil compaction |
Created by:
BanksAg
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