Cultivation Research Overview and Nutrient Management

Flashcards covering key terms and concepts in cultivation research and nutrient management.

Fertilization

The process of applying nutrients to the soil to enhance crop growth.

Nutrient Yield Relation

The relationship between the amount of nutrients supplied to a crop and the yield it produces.

Marginal Productivity

The additional output produced as a result of an increase in the input of a specific fertilizer.

N-Uptake

The amount of nitrogen that a crop can absorb from the soil.

N-Requirement

The total amount of nitrogen needed by a crop to achieve optimal growth.

Fertigation

The process of applying fertilizers through the irrigation system.

Physiological Response

The growth response of plants to nutrient availability, influenced by factors like nutrient concentration.

N-Use Efficiency (NUE)

The ratio of biomass produced to the amount of nitrogen absorbed by the plant.

Three Quadrant Diagram

A graphical representation used to analyze the relationship between nutrient supply and crop yield as influenced by agronomic and physiological factors.

Calcium Uptake

The absorption of calcium by plants whitch is crucial for structural and physiological functions.

Too few nutrients

Low growth and low yield

Optimal amount

Maximum yield

Too many nutrients

Yield decreases (damage/toxicity)

Law of the minimum

The most limiting nutrient determinse growth

Nutrient urs efficiency

How efficiently the plant uses nutrients

Soil nutrients supply

Nutrients already present in the soil

Piper Steenbjerg effect

Growth increases

Nutrient concentration in the plant decreases

Marginal productivity

Indicters how much extra yield you get per extra fertilizer

Beginning marginal productivity

Large yield increase with little fertilizer

Middle marginal productivity

Smaller yield increase

End marginal productivity

No or negative yield increases

Fertilaztion advice, You must consider

What you apply

When you apply

Where you apply

For what nutrient solutions are adjusted per growth stage

Start

Flowering

Fruit set

End of cultivation

Inportent rations

N:P:K

K/Ca

C/N

N/P

N:P:K

key ratio

K/Ca

plant quality and vigour

C/N

soil and decomposition processes

N/P

plant strategy and growth versus stress

Beginning of growth

More calcium (Ca)

Less potassium (K)

Flowering/fruiting

Less calcium (Ca)

More potassium (K)

Nitrogen (N)

High during grwoth

Decreases due to dilution and aging

Calcium (Ca)

Not mobile in the plant

remains in the same tissues

Plants grow best with

The right amount of nutrients

The right ratios

The right timing

N-uptake

N-concentration in plant x total biomass

What affects N uptake

Optimal N concentration for crop

Root development

Soil moisture

Soil nitrogen supply

Climate

The Quadrant Diagram

This model shows how nitrogen ultimately affects yield

Overvieuw of staps for the Quadrant diagram

N input

N available in soil

N uptake by plant

Growth/yield

1st quadrant: Agronomic respons

Relationship between fertilizer and yield

2st quadrant: Physiological response

Describes what happens inside the plant

Nutrient Use Efficiencky (NUE)

How efficiently a plant converts nutrients into growth

Harvest index

Fraction of nitrogen in the edible part

Often the moste inportent factor

3rd quidrant: Soil and environment

Focuses on processes in soil or substrate

Influences 3rd quadrant: Soil and environment

Soil fertility

Root activity

Soil processes

Key insights from the model

Yield is determined by a chain

fertilizer → availability → uptake → efficiency → yield

The slope of the line in the model

Indicates how efficiently nutrients are used