Soil Chemistry
31 important questions on Soil Chemistry
What is the definition from soil fertility?
How much does a grasland+arable cropping (akkerbouw) costs?
Is there a relationship between the price and the soil quality/fertility?
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Is a good soil priceless (onbetaalbaar)?
Wherefor is protein essential?
Which material is one of the main elements in protein?
Which material is also a component of nucleic acid, DNA, RNA, genes, chromosomes, enzymes, chlorophyll, secondary metabolites, and amino acids?
Where does inorganic matter come from?
In which two ways can Nitrogen been picked up?
Or via Passive uptak by water
Can the losses from Nitrogen be large?
What happens with <1 year with SOM
What happens >1 year with SOM?
Where does the OM and mineral release process depend on?
What are the 7functions of catch crops/green manure? (vanggewas en groenbemesters)
- Improving evaporation (verdamping) and infilitration (filtratie)
- Soil cover
- Nitrogen recovery and availability
- Activates soil organisms and soil health
- inhibits (some) nematodes (wormen)
- Weed control
- Adds organic matter
What are mineral fertilizers for grasslands or maize (nitrogen)
Ureum (less common, converted into ammonium)
What are organic fertilizers on grasslands or maize (nitrogen)
Farm yard manure (with straw), pig manure
Which fields do mostly get more fertilizers? And why?
low producing fields, so they improve
How to cut (bezuinig) on fertilisation?
Apply equal (gelijk) N-rate to all fields, irrespective (ongeacht) of N-mineralisatie
What are two similarities between Phosphate (P) and Nitrogen (N)
- Made available from OM by soil Organisms
- Environmental issues
What are 5 differences between Phosphate (p) and Nitrogen (N)
mainly present in mineral rocks (P?)
P can exchange with other minerals on clay
More chemistry, less Biologie
non renewable (niet hernieuwbaar)
Where does NV stand for?
Wherefor do you liming (kalk bemesting)
Whenn do you add lime (kalk) before cultivation?
Why do you add lime (kalk) after ploughing?
Why do you add lime (kalk) after grass sprays (such as roundup)?
Why do you add lime (kalk) before drilling (boren)?
When do you add lime to silage fields?
Before which type of grass starts growning do you add lime?
What do you have to avoid if you have a high magnesium soil?
In which unit does CEC (cation Exchange capacity) been showed? (klei-humus)
In which unit does Soil food web been present?
The question on the page originate from the summary of the following study material:
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