Download - خصوبة التربة
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Prof. Dr. Zkaria M. El-SirafyDr. Ayman M. EL Ghamrey Mansoura University
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: Soil Fertility : Available Nutrient
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: Field investigation . . . .
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6. 7. 8. . 9. . 10.
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Plant Analysis (1) :
Naked eye Magnifying glass Microscope
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Nitrogen (N) () . Phosphorus (P) ( )
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Potassium (K) ( ) . Calcium (Ca)
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Magnesium (Mg) ( ) Sulfur (S)
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Iron (Fe)
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Zinc (Zn) .
Manganese (Mn) .
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Cupper (Cu) .
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Boron (B) () Molybdenum (Mo) . .
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(2) Leaf analysis . () Latest mature leaf .
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: . . .
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(3) . . .
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:
(5-6 ) . . . Luxury Consumption Toxicity .
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: Soil Analysis (1) (2) Weeds(3) ( ) (4)
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1 - : Complete soil Analysis . 2 - Weeds 3 - 4 - (10 ) 5
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Soil Sampling(1) Composite Sample 8-10 (2) Site Specific Samples (3) Grid Samples (4) Directed or Judgment sample
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. ( 15-30) N Soil Tests P Soil Tests K Soil Tests
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: (1) Micro organisms methods (2) Plant methods
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: Field experiments Pot experiments
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Calibration Standards : (1) relative yield
2) Plant nutrient content .(3) . () Acute Latent
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: Chemical methods(1) Konig 1% 1% .
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: Chemical Biological Methods (Neubouer) . : 100 50 250 100 . 70-80 3 3 . . .
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5- 17 /100 . 6- ( ) . 7- /100 / 12 . 6 / 100 P2O5 24 /100 K2O
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: Biological methods Field Experiments field experiments
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Thank You