Fertility management

Acronyms to remember macronutrients

No, Poor, Knights

Carbon, Houses, Organisms

Cant ManaGe Sluts

What are the micronutrients (Hint 8)

Cu, Zn, Fe, Mo, Ni, Cl, B, Mn

What is the 18th micronutrient?

Cobalt (Co)

What is the most used nutrient in turf?

Nitrogen

How do you test for Nitrogen?

Clipping color, yield, and appearance. Soil test are no good.

What does a NDIV device do?

Sees how much cloryphyll a leaf has to help determine health.

How is turf grass assesed?

A scale from 1 to 9 is used to determine color and quality.

Why do we measure green clippings?

We want consistent grow rates across the course and do not want a high grow out. Too much growth leads to stress from cutting.

What is a green keepers nightmare?

A pythium blight

How is N applied to cool weather grasses?

Spring is light with summer only as much needed. Fall is bulked up and winter is light.

How is warm season grass N applied?

1 lb N/1000ft2 is best

Water soluble nitrogen

Nitrogen that is quick to absorb, ready for uptake, but is leached quickly

Water Insoluble Nitrogen

Realeases N slowly and overtime while reducing burn potential

What is the difference in organic and inorganic fertilizer?

Innorganic fertilizer has no C in it. It has high burn potential as well.

Natural vs syntheic organic fertilizer?

Natural comes from plant/animal sources instead of from lab synthesized N.

Why is natural fertilizer rarely used in turf?

Peopl dont want to wallow in shit.

What is the most used fertilizer type in turf grass?

Synthetic organic fertilizer.

What is the most concentrated N source used in Turf?

urea (think of busting that shit)

What percent N is urea

46%

How do we slow N leaching?

We coat it in chemicals or pre react it.

Why do we want phosphorus early?

It promotes root growth and is the most important macro in early establishment.

Why do people overuse P.

It is good at fighting disease pressure while not bothering turf

Why is P being used in lower quantities?

Eutrophication and annual bluegrass troubles.

How is K a bit weird?

It is not accutally used in biochemical processes but is a COFACTOR.

When should you apply little amounts of K

It should be applied in low CEC soils (sandy)

What MICROnutrient is most likely to be deficient in turf?

Fe

What does low amounts of most of the micros result in?

chlorosis

what should you never buy from shady slaesmen

Boron treatments when not needed.

Circle area

PiR²

Triangle area

BxH/2

Oval

LxWx0.8

Rectangle/square angle

LxW

What is the term called when fertilizer absorbs atmospheric h2o?

Hygroscopy

What is the first tell a plant needs more nitrogen?

It has yellowing leaves

What does too much N potentially cause?

Pythium blight and brown spot disease.

How mobile is phosphorus?

pretty immoblie overall