Online seminar



Soil analysis
-Physical properties
-pH
-Nutrient content,…
•
•Helps determine: nutrient availability
• determine the values of the following fertilization
• economic decision making
•
•- sampling after harvesting or before fertilizing (in several places depending on the plot –
slope, sampling depth,…)
-

•- soil texture refers to the proportion of sand, loess and clay particles
•
•- the soil triangle is used in soil texture analysis
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•- different textures affect the physical processes in the soil:
•- eg: sandy soils drain quickly but have limited water holding capacity and low nutrient content
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•loess soils are more fertile than sandy soils and retain water better
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•clay soils hold water well, but drain poorly
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•loamy soils (also called agricultural soils) are generally preferred because they retain moisture,
nutrients and humus well

Soil properties:
•Specific gravity
•Density
•Porosity
•
•pH
•
•- see exercise no. 3 and no. 4

il no.
Specific gravity
1
2,5
2
2,7
3
2,4
4
2,5
5
2,2
6
2,5
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Density



Evaluation of the experiment - influence of factors on the quality of MP
-determination of N
-HPLC analysis
-calculation of values per unit of dry matter (tenth of a gram)
-graphic output

cultivation
Anthocyanine - peak areas – fresh material
light
44.7
dark
9.9

Odkazy:
•https://www.sciencedirect.com/topics/earth-and-planetary-sciences/soil-porosity
•https://www.youtube.com/watch?v=Rt1qD7Ldhng
•https://www.youtube.com/watch?v=moexid5puSI
•https://www.youtube.com/watch?v=zQowljL8e5E
•https://www.youtube.com/watch?v=i0ymSP_e2-w
•(12) Nitrogen Cycle | #aumsum #kids #science #education #children - YouTube
•Cation Exchange (youtube.com)
•
•Půdy – Procvičování online – Umíme fakta (umimefakta.cz)
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