General Nutritient Information Flashcards
How many nutrients are essential for the existence of grasses?
13
The proportions of which vary considerably.
Name Grass the macronutrients.
Nutrients that compose >1% of dry tissue.
- Nitrogen
- Phosphorus
- Potassium
- Chlorine
- Calcium
- Magnesium
- Sulphur
Name the 6 plant micronutrients.
- Iron
- Manganese
- Zinc
- Copper
- Boron
- Molybdenum
Large and vital components of plants are the non-mineral elements. What are they? What defines them?
- Carbon
- Oxygen
- Hydrogen
Considered non-mineral as they are mostly obtained from the air and water. Mineral nutrients are derived exclusively from the soil.
Plants take up nutrients from the soil solution. What is the rate of uptake usually related to.
The concentration of available nutrients in solution.
The nutrient concentration is effected by ______ & ______ factors.
Internal & External
External nutrient concentration factors?
- Fertiliser Input
- Nutrients in irrigation water
- Deposition from the air.
Internal nutrient availability factors are…
- Amounts and chemical form of the nutrient.
- Soil processes which affect the relationship between solid and solution.
Nutrients that occur in stable forms are available for plants to take up?
False
Stable elements will not release into the solution to be taken up by the roots.
Chemical stability can vary with what two soil factors.
- pH
- Aeration
What is the optimum pH range for broad nutrient availability is?
6.5-7
The Major nutrients that will limit plant growth are?
Nitrogen
Phosphorus
Potassium
Which is why they are the predominant factors in most fertiliser.
Nitrogen can be required in considerably higher volume than other minerals. But what is the ratio of N to P & K?
8.5/1/6
N,P,K
