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Cca Exam Questions And Answers With Verified Solutions Already Passed!!!
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Cca Exam Questions And Answers With Verified Solutions Already Passed!!!
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Cca Exam Questions And Answers WithVerified Solutions Already Passed!!!
What process causes a plant to fix nitrogen? - ANSWER✔✔Rhizobium bacteria
infects plant root and forms nodule
Legumes and Rhizobium bacteria have what kind of relationship? -
ANSWER✔✔Symbiotic
How much nitrogen does alfalfa fix? - ANSWER✔✔250
How much nitrogen does sweet clover fix? - ANSWER✔✔170
How much nitrogen does red clover fix? - ANSWER✔✔150
How much nitrogen does soybean fix? - ANSWER✔✔100
How much nitrogen does hairy vetch fix? - ANSWER✔✔70
How much nitrogen do field peas fix? - ANSWER✔✔50
After a field is planted with a legume, a grass species is planted such as corn, grain
sorghum, or other small grains. How much nitrogen is needed for a credit from the
legume species? - ANSWER✔✔Half of what it fixes annually
What factors limit nitrogen fixing of legumes? - ANSWER✔✔Soil pH, Temp, soil
aeration, photosynthetic rate, soil fertility, high nitrogen in soil
What is the optimum range for soil pH to fix the most Nitrogen? -
ANSWER✔✔5.5 to 7
What is the optimum range for temperature to fix the most Nitrogen? -
ANSWER✔✔65 to 82
What are the temp limits to fixing nitrogen? - ANSWER✔✔32 to 112
Do legumes fix more nitrogen with sunny or cloudy days? - ANSWER✔✔Sunny
, What essential element is most essential to converting elemental nitrogen to
ammonia nitrogen? - ANSWER✔✔Molybdenum
Nebraska soil normally contains enough molybdenum for plants, what can limit
this and how can it be fixed? - ANSWER✔✔Acid soils and liming
How does high nitrogen affect legumes? - ANSWER✔✔Will fix less nitrogen
Definition of a physical change - ANSWER✔✔Change from solid to solution
Definition of a chemical change - ANSWER✔✔change from one ionic form to
another
Definition of a biological change - ANSWER✔✔Change by soil micor organisms
Definition of Nitrification - ANSWER✔✔micro biological changes of ammonium
nitrogen to nitrite and then nitrate
Nitrite salts chemical form - ANSWER✔✔NO2
Nitrate Salts Chemical Form - ANSWER✔✔NO3
Ammonium Salts chemical form - ANSWER✔✔NH4
What causes the first step in Nitrification? - ANSWER✔✔Nitrosomonas and
Nitrosococus bacteria
What causes the second step of Nitrification? - ANSWER✔✔Nitrobacter bacteria
What environmental conditions are the best for nitrification? - ANSWER✔✔80 to
90 degree soils, neutral pH, high soil moisture but with adequate oxygen
Definition of denitrification - ANSWER✔✔the conversion of nitrate nitrogen
(NO3) to lesser oxidized forms
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