Term
| macro and micro nutrient differences |
|
Definition
required i different amounts
all are essential |
|
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Term
|
Definition
N :photosynthesis
P: energy transfer ATP
synthesiss of proteins, stomata open close |
|
|
Term
| know the diagram of the nutrient cycle!! |
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Definition
|
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Term
| to make N fertilizer need what? |
|
Definition
| high pressure, temp and catalyst |
|
|
Term
| different types of fertilizers N? |
|
Definition
urea: most common
ammonium nitrate: explosive potential
nitric acid: gasous,toxic |
|
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Term
|
Definition
• Accounts for 50-65% of total N fixed annually
• Host specific infection (rhizobium sp.)
• All have one enzyme in common (NITROGENASE)
• Bacteria need some oxygen BUT fixation of N2 can only
take place in low oxygen environment
• Leghemoglobin |
|
|
Term
|
Definition
Decomp of OM by soil organisms
C-N ratio low surplus |
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|
Term
|
Definition
N required to build tissue for microrganisms
C-N ratio high, less availability1 |
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|
Term
| factor influencing decomp? |
|
Definition
• Type of organic matter
• Size of organic matter
• Amount of mixing in the soil
• Temperature
• Moisture
• Oxygen status
• Soil pH
• Nutrient content |
|
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Term
|
Definition
autotrophic bacteria
covert NH4 to NO2 then NO3 |
|
|
Term
|
Definition
loss dependent on cocn. of NO3 in soil
methemogolinemia |
|
|
Term
| factor influencing dentitrification? |
|
Definition
• Typically occurs in low oxygen environments (wet soil)
• Requires both nitrate and organic material to occur
• Rate related to temperature and pH
• End product related to the time with low oxygen
• Heterotrophic |
|
|
Term
|
Definition
- Improper application of anhydrous ammonia
- Urea application
- High pH soils
- Low buffer capacity soils
- Not incorporated
- Hot
- dry
- From manure
- storage
- transfer
- application
- in field |
|
|
Term
| know the diagram for the: |
|
Definition
| P cycle, similar to N cycle |
|
|
Term
| what systomps doe nutrient deficiencies show of NPK |
|
Definition
K- yellowing, necrosis
P- purple, mobile in plant
K-lodging |
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|
Term
|
Definition
| know the math and how to do lab 5 |
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