Before preparing a new garden plot, what should be cleared?
A All nearby trees
B Every earthworm
C The topsoil layer
D Existing vegetation
Answer: D. Existing vegetation. Removing existing vegetation is an important first step when preparing a new garden area.
What should guide decisions about fertilizer or soil amendments?
A The soil’s color alone
B A neighbor’s routine
C A soil test
D A fixed annual dose
Answer: C. A soil test. A soil test helps identify whether nutrients or pH adjustments are needed.
How can a gardener collect a representative soil sample?
A Use one surface pinch
B Mix samples from several spots
C Collect only dry leaves
D Take soil from one pot
Answer: B. Mix samples from several spots. Collect similar amounts from several spots in the same garden area and mix them.
If two garden areas have different soil, how should they be sampled?
A Mix them with compost
B Keep their samples separate
C Test only the darker area
D Use one shared sample
Answer: B. Keep their samples separate. Different areas may have different soil conditions, so sample them separately for useful results.
Which information may appear in a garden soil test?
A Future rainfall totals
B Plant mature height
C Daily sunlight hours
D pH and nutrient levels
Answer: D. pH and nutrient levels. Soil tests can report pH, nutrient levels, and often organic matter.
Why is testing soil before fertilizing helpful?
A It removes every weed
B It avoids unnecessary inputs
C It changes the soil texture
D It guarantees a large harvest
Answer: B. It avoids unnecessary inputs. Test results can show whether fertilizer is needed and help prevent excess application.
On a fertilizer label, what do the three N-P-K numbers represent?
A Nickel, phosphorus, calcium
B Nitrogen, potassium, calcium
C Nitrogen, phosphorus, potassium
D Nitrate, phosphate, calcium
Answer: C. Nitrogen, phosphorus, potassium. The N-P-K numbers list percentages of nitrogen, phosphorus, and potassium, in that order.
Which plant function is nitrogen commonly associated with?
A Green leafy growth
B Flower color only
C Fruit sweetness only
D Soil drainage
Answer: A. Green leafy growth. Nitrogen supports green vegetative growth, though the right amount depends on the plant and soil.
Which plant function is phosphorus commonly associated with?
A Root and fruit development
B Leaf color only
C Water drainage
D Seed coat thickness
Answer: A. Root and fruit development. Phosphorus supports root development and fruiting processes in plants.
How does potassium contribute to plant growth?
A Creates sunlight
B Supports plant processes
C Replaces all nitrogen
D Stops root growth
Answer: B. Supports plant processes. Potassium supports multiple plant functions; apply it only when soil results indicate a need.
What can organic matter add to prepared soil?
A Structure and nutrients
B More sunlight
C A permanent weed barrier
D Guaranteed pest control
Answer: A. Structure and nutrients. Organic matter can improve soil structure and contribute nutrients as it decomposes.
How can organic matter help heavy clay soil?
A Improve soil structure
B Make it dry instantly
C Remove all clay
D Eliminate testing needs
Answer: A. Improve soil structure. Organic matter can improve aggregation and drainage in clay-rich soils.
What can organic matter help sandy soil retain?
A Large rocks
B Air pollution
C More weeds
D Water and nutrients
Answer: D. Water and nutrients. Organic matter can help sandy soils hold more water and nutrients.
When should soil not be tilled or dug?
A When it is too wet
B When leaves are green
C After a dry day
D Before adding a path
Answer: A. When it is too wet. Working wet soil can compact it and create hard clods.
What can a squeeze test reveal about soil moisture?
A Whether soil is workable
B Its nutrient levels
C Its pH exactly
D Its seed viability
Answer: A. Whether soil is workable. A handful that stays as a muddy ball is too wet to work; workable soil crumbles when touched.
How should ready-to-work soil feel when squeezed?
A Sticky like wet clay
B Crumbly when touched
C Powdery and dusty
D Hard as a stone
Answer: B. Crumbly when touched. Soil that crumbles when touched is generally more suitable for digging than soil that sticks together when wet.
Why avoid repeated, unnecessary tilling?
A It increases rainfall
B It removes every pest
C It improves all soil types
D It can damage soil structure
Answer: D. It can damage soil structure. Frequent tilling can break down soil structure and leave the surface more prone to drying or crusting.
What can over-tilling do to fine soil particles?
A Increase their size
B Raise soil pH
C Add organic matter
D Make them dry faster
Answer: D. Make them dry faster. Pulverized soil can dry more quickly and form a surface crust.
Why can tilling bring new weeds into a bed?
A It exposes dormant seeds
B It removes the seed bank
C It blocks sunlight
D It sterilizes the soil
Answer: A. It exposes dormant seeds. Tilling can expose dormant weed seeds to conditions that allow them to germinate.
When is tilling most useful?
A As often as possible
B Whenever weeds appear
C Before every watering
D For a specific soil task
Answer: D. For a specific soil task. Till only when it serves a purpose, such as mixing amendments or loosening soil for planting.
Which method can suppress existing vegetation without turning soil?
A Adding more fertilizer
B Watering every hour
C Smothering with a cover
D Raking the soil daily
Answer: C. Smothering with a cover. Smothering methods block light from existing vegetation and can prepare an area without repeated tilling.
How can a dark tarp suppress weeds before planting?
A Add nutrients to roots
B Block light from reaching soil
C Increase seed dispersal
D Improve soil pH
Answer: B. Block light from reaching soil. An opaque cover blocks light, weakening existing vegetation and preventing some seeds from germinating.
What is a benefit of applying mulch to prepared soil?
A Replace all compost
B Add instant nitrogen
C Suppress weeds and conserve moisture
D Remove the need for plants
Answer: C. Suppress weeds and conserve moisture. Mulch can limit weed growth and reduce moisture loss from the soil surface.
Why keep garden paths distinct from planting beds?
A Increase soil compaction
B Reduce foot traffic on soil
C Prevent access to plants
D Make drainage impossible
Answer: B. Reduce foot traffic on soil. Defined paths keep repeated foot traffic away from growing areas and help protect soil structure.
When may raised beds be useful during soil preparation?
A Where sunlight is absent
B When plants need no water
C Where soil drains poorly
D To avoid all soil testing
Answer: C. Where soil drains poorly. Raised beds can help when native soil stays wet or drains slowly.
What should be used to fill a raised bed?
A Compost alone
B A suitable soil mix
C Unscreened construction debris
D Only fresh manure
Answer: B. A suitable soil mix. Raised beds need a suitable soil mix; compost alone lacks the mineral component of soil.
Why should a raised bed not be filled only with compost?
A It blocks all sunlight
B It stops plant roots
C It lacks mineral soil
D It contains no organic matter
Answer: C. It lacks mineral soil. Compost alone does not provide the full mineral component needed in a growing medium.
Before filling a raised bed, what can help connect it to the site soil?
A Cover it with plastic
B Pack it down firmly
C Loosen the existing surface
D Remove all topsoil
Answer: C. Loosen the existing surface. Breaking up the original soil surface allows better contact between the bed mix and native soil.
Which material can improve soil structure when added appropriately?
A Finished compost
B Fresh paint chips
C Plastic fragments
D Pure gravel
Answer: A. Finished compost. Finished compost adds organic matter and can improve soil structure when used appropriately.
Why should compost amounts be matched to site needs?
A Soils differ in condition
B Compost always raises sunlight
C All beds have identical nutrients
D Plants need no mineral soil
Answer: A. Soils differ in condition. Soil type and test results help determine whether and how much compost or another amendment to add.
What is a sensible step before changing soil pH?
A Add lime automatically
B Test the soil first
C Use sulfur every season
D Mix several acids
Answer: B. Test the soil first. Test results and local recommendations should guide pH amendments.
Which amendment can raise soil pH when recommended?
A Sulfur
B Finished compost only
C Lime
D Wood chips
Answer: C. Lime. Lime can raise pH, but it should be used only when testing shows a need.
Which amendment can lower soil pH when recommended?
A Lime
B Sulfur
C Sand
D Perlite
Answer: B. Sulfur. Sulfur can lower soil pH; apply it only according to test results and local directions.
Why is excess phosphorus a concern?
A It removes all weeds
B It blocks sunlight
C It can harm waterways
D It prevents soil drainage
Answer: C. It can harm waterways. Excess phosphorus can move into water and contribute to unwanted plant growth there.
What should be done with rocks and construction debris in a bed?
A Bury them under roots
B Mix them into compost
C Leave them in seed rows
D Remove them during preparation
Answer: D. Remove them during preparation. Removing debris creates a more suitable planting area and avoids obstacles for roots and tools.
How can compacted areas be addressed without damaging soil?
A Dig while soaked
B Drive over the bed
C Pulverize it repeatedly
D Wait until moisture is suitable
Answer: D. Wait until moisture is suitable. Soil should be neither too wet nor too dry when loosening it; wet soil compacts easily.
What can a cover crop contribute to garden soil?
A Organic matter and protection
B Permanent fertilizer
C Instant soil testing
D Guaranteed pest removal
Answer: A. Organic matter and protection. Cover crops can add organic matter and help protect soil between plantings.
Why leave plant residue or mulch covering soil between crops?
A Prevent all root growth
B Increase runoff
C Expose dormant weeds
D Limit erosion and moisture loss
Answer: D. Limit erosion and moisture loss. A soil cover can reduce erosion and help conserve moisture.
What should gardeners consider before using manure in a food garden?
A Apply any fresh manure
B Proper composting and guidance
C Mix it with produce
D Ignore local recommendations
Answer: B. Proper composting and guidance. Manure handling and timing matter for food gardens; use well-managed material and follow local food-safety guidance.
Why should soil-test recommendations be followed when applying fertilizer?
A Rates depend on nutrient needs
B Same mix for every soil
C Fertilizer works only in shade
D Labels are optional
Answer: A. Rates depend on nutrient needs. Soil tests help match fertilizer rates to actual nutrient needs and reduce unnecessary application.
What does too much fertilizer risk causing?
A Better drainage automatically
B Excess nutrients and runoff
C Fewer weeds in every case
D Stronger roots in every plant
Answer: B. Excess nutrients and runoff. Excess nutrients can harm plants or move into waterways, so follow test and label guidance.
When is soil preparation easier on a small plot?
A With a large tractor always
B Using household chemicals
C With suitable hand tools
D By walking across beds
Answer: C. With suitable hand tools. A spade or fork may be enough for a small area, depending on soil condition and compaction.
Why should soil amendments be mixed only as deep as needed?
A To target the growing zone
B To bury every earthworm
C To remove all soil life
D To create a hardpan
Answer: A. To target the growing zone. Incorporate amendments according to recommendations and the depth needed for the intended planting.
How can a poorly drained heavy soil be managed?
A Add water every day
B Compact it further
C Consider a raised bed
D Cover it with concrete
Answer: C. Consider a raised bed. Raised beds can improve drainage where heavy soil remains wet after rain.
What should be done if soil is very dry and dusty before digging?
A Moisten it, then wait
B Till it immediately
C Add fertilizer without testing
D Flood it for days
Answer: A. Moisten it, then wait. Very dry, dusty soil is difficult to work; moisten it and allow time before digging.
Why can excessive tilling increase later weeding?
A It sterilizes the topsoil
B It removes all roots
C It blocks germination
D It exposes buried weed seeds
Answer: D. It exposes buried weed seeds. Tilling can bring dormant weed seeds to the surface where they may germinate.
What is a low-disturbance approach to preparing an existing bed?
A Turn every layer repeatedly
B Walk across planting rows
C Add compost at the surface
D Remove all organic matter
Answer: C. Add compost at the surface. Surface applications of compost can refresh an existing bed while limiting soil disturbance.
How can soil preparation help protect the soil structure?
A Till on a schedule
B Work soil while wet
C Remove organic matter
D Minimize unnecessary disturbance
Answer: D. Minimize unnecessary disturbance. Limiting disturbance and avoiding wet-soil work help preserve soil structure.
What should be evaluated before planting after soil amendments?
A The tool’s paint color
B The nearest shop
C The plant’s pot label only
D Soil condition and test advice
Answer: D. Soil condition and test advice. Check that the soil is workable and that amendments follow the test recommendations before planting.
Which principle best summarizes careful soil preparation?
A Add every available product
B Amend only as needed
C Till as often as possible
D Ignore soil moisture
Answer: B. Amend only as needed. Test, observe, and amend as needed rather than adding products or disturbing soil without a clear reason.