NR 501 STUDIO SOILS EXAM 2 QUESTIONS WITH CORRECT ANSWERS 2025/2026

NR 501 STUDIO SOILS EXAM 2 QUESTIONS
WITH CORRECT ANSWERS 2025/2026
The relative abundance of soil organisms from most to least - CORRECT ANSWER -Bacteria and
fungi, Mircofauna, Macrofauna, Worms



Amount of worms in 1 handful of soil - CORRECT ANSWER -1 earthworm/snail/slug



Amount of macrofauna in 1 handful of soil - CORRECT ANSWER -50,000



amount of protozoa (microfauna) in 1 handful of soil - CORRECT ANSWER -20 million



amount of nematodes (microfauna) in 1 handful of soil - CORRECT ANSWER -100,000



amount of bacteria in 1 handful of soil - CORRECT ANSWER -200 billion



length of fungal hyphae in 1 handful of soil in meters - CORRECT ANSWER -100,000 meters



major group of soil organisms containing bacteria, archaea, fungi/mycorrhizae - CORRECT
ANSWER -Microbes



major group of soil organisms containing protozoa, nematodes



consumers of soil microbes, release plant available nutrients - CORRECT ANSWER -Microfauna



major group of soil organisms including collembola, rotifers, mites, earthworms

, shredders of organic matter, consumers of smaller organisms - CORRECT ANSWER -Macrofauna



primary producer organisms in soil - CORRECT ANSWER -plants



trophicWlevelWinWsoilWfoodWwebWthatWcontainsWphotosynthesizers;



Plants

(1st,W2nd,3rdW,4thW,5th+)W-WCORRECTWANSWERW-1st



trophicWlevelWinWsoilWfoodWwebWthatWcontainsWdecomposers,Wmutualists,Wpathogens,Wparasites,Wr
ootWfeedersW;



Nematodes,Wfungi,Wbacteria

(1st,W2nd,3rdW,4thW,5th+)W-WCORRECTWANSWERW-2nd



trophicWlevelWinWsoilWfoodWwebWthatWcontainsWshredders,Wpredators,WgrazersW;



arthropods,Wnematodes,Wprotozoa

(1st,W2nd,3rdW,4th,5th+)W-WCORRECTWANSWERW-3rd



trophicWlevelWinWsoilWfoodWwebWthatWcontainsWhigherWlevelWpredatorsW



arthropods,Wnematodes

(1st,W2nd,3rdW,4thW,5th+)W-WCORRECTWANSWERW-4th