adv. silv. fertilizers

Why is fertilizer expensive?

it is very energy intensive to make

CRIFF

Cooperative Research In Forest Fertilization

Why cant you fertilize a sandhill? What criff class is it?

It cant hold water, therefore trees cant uptake the nutrients. Class G

What is the full tree response time to nitrogen fertilizer?

7 years

What compound is extremely volitile?

Ammonium Nitrate, Oklahoma city bombing

Old field sites are more productive for...

loblolly pine because of tillage and residual fertilizer.

List all of the Macronutrients (C.HOPKiNS CaFe Mighty good)

Carbon, Hydrogen, Oxygen, Phosphorus, Potassium, Nitrogen, Sulfur, Calcium, Iron, Magnesium

List all of the Micronutrients (CLaimed By Mine CuZin Mo)

Chlorine, Boron, Manganese, copper, zinc, Molybdenum

Micronutrients are just as necessary, but required...

in smaller amounts

True or false: all elements are required by all plants.

false

CRIFF A major land area and drainage

Savannas, very poor to somewhat poor

CRIFF B major land area and drainage

Savannas, very poor to somewhat poor

CRIFF C major land area and drainage

Flatwoods, poor to somewhat poor

CRIFF D major land area and drainage

Flatwoods, poor to somewhat poor

CRIFF E major land area and drainage

Uplands, moderate to well

CRIFF F major land area and drainage

Uplands, moderate to well

CRIFF G major land area and drainage

Sandhills, Excessive

CRIFF H major land area and drainage

Depressions, Very poor

What happens when you fertilize a stand a do not thin at the same time?

No response, must thin when you fertilize.

When do you see best response to fertilizer during a thin?

when cut at 60 square feet per acre

What happens when you fertilize to much?

result in nutrient imbalance, resulting in southern pine beetle attraction

What is the conversion to %N for Phosphorus(P) ?

.44

What is the conversion to %N for Potassium(K) ?

.83

Why would you not put nitrogen fertilizer on soybeans?

they are N fixing legumes

True or False: N-fixer "Rhizobia" does not "kick In" immediantly

true

(10-10-10) what is the % element N?

10, 4.4, 8.3

What is the Big 3 macronutrients?

N,P,K

Mid rotation fertilization is best recommended for forest stands that__________. ____________._____________.

are responsive to the nutrient amendments, large enough to justify the cost(>40 acres), and are nutrient deficient

What is the most important question when determining if you should fertilize or not?

is the site nutrient deficient?

True or false: Most soils respond to fertilization to some degree

true

Well drained sandy soils are often limited in...

N, P, K, and B

Significant growth responses are common on these land areas (3)

Wet savannas, Piney flatwoods, upland clay sites that a P deficient

Generally, as drainage and sand or clay content increases, response will...

decrease

Soils derived from granite are generally considered...

poor soils (phosphate deficient)

Do most piedmont soils need additional potassium?

no, granite has a high potassium level

True or false: shale and sandstone are high in potassium.

true

true or false: shale and sandstone are high in phosphorus

false

What is a good indicator of a better, rich soil?

dusky red color

true or false: shallow soils that restrict rooting depth due to heavy clay or rocky subsoil may not respond well to fertilization.

true

Probability of success to fertilization response to common Coastal Plain soils: Criff A/B

High (P deficient)

Probability of success to fertilization response to common Coastal Plain soils: Criff C/D

Moderate

Probability of success to fertilization response to common Coastal Plain soils: Criff E

High

Probability of success to fertilization response to common Coastal Plain soils: Criff F

low

Probability of success to fertilization response to common Coastal Plain soils: Criff G

Low

Probability of success to fertilization response to common Coastal Plain soils: Criff H

moderate

______ deficient soils respond to fertilization with a long lived and dramatic volume gain that may extend into the second rotation

Phosphorus (P)

When should you thin in regards to fertilization?

prior to, or within, 2 years after fertilization

What are the 2 more commonly recommended fertilizers applied to forested stands?

Diammonium phosphate (DAP) and Urea

When is the best time to apply DAP and Urea?

November to early March