Reforestation - Dr. Jimmie Yeiser, UAM

THANK YOU!

• Thank you AFA for inviting me to speak today.

• Thank you friends for the memories.

• Thank you students for the privilege of sharing the classroom for you.

New Reforestation Technology Trends for Improved Forest Health and Economic Impact

Dr. Jimmie YeiserUniversity of Arkansas at Monticello

Provost and Vice Chancellor for Academic Affairs

October 2, 2013Arkansas Forestry Association

PURPOSE

• Consider your silviculture options

New Reforestation Technology Trends

• New– Familiar but never used– Different use for me– Totally new and never heard of before

• Reforestation– Genetics– Site preparation/amelioration– Competition control– Planting

• Technology– Application of scientific knowledge for practical purposes

• Trends– Implies change over time

Jimmie Yeiser * University of Arkansas at Monticello

DRIVING OUR TRENDS

• Demographics• Environmental quality• Demand for forest resources• Invasive species/exotics

Jimmie Yeiser * University of Arkansas at Monticello

TRENDS

• 1--Improved deployment strategies of genetic material for enhanced yield and forest health

• 2--Improved site quality for higher realized genetic performance

• 3--Improved integration of treatments for improved yield and forest health

CONCEPTUAL UMBRELLA

Phenotype=Genotype+Environment+Interactions

P=the physical appearance; what you seeG=genotype; genes the tree has; potential performanceE=environment; site quality; number of silviculture

treatments practiced; realization of the genetic potentialGxE=specific genetic and environment combinationsGxT1xT2=specific treatment combinations

Jimmie Yeiser * University of Arkansas at Monticello

INTERACTIONS

Female 1

Female 1

Female 2

Female 2

Growth Growth

Site 1 Site 2 Site 1 Site 2

Treatment 1

Treatment 2

Growth

Site 1 Site 2

Treatment 1

Treatment 2

Growth

Site 1 Site 2Jimmie Yeiser * University of Arkansas at Monticello

Height

High

Low HighMean Site Height

S LASE TX

N LAS AR

Jimmie Yeiser * University of Arkansas at Monticello

Seed Source by Environment Interaction

0 0.5 1 1.5 2 2.5 3 3.5 40

0.5

1

1.5

2

2.5

3

3.5

4

4.5

5

24-in Subsoiling

Linear Regression 24-in Subsoiling

Linear (24-in Subsoiling)

12-in Subsoiling

Linear Regression 12-in Subsoiling

Machine Planting

Linear Regression Machine Planting

Hand Planting

Linear Regression Hand Planting

Average Site DBH

Treatment DBH (IN)

F1igure 1. Linear regression of DBH for each treatment plotted over site mean DBH, for 21 upland sites. Treatments are as follows: 24-in subsoiling and hand plant, 12-in subsoiling and hand plant, machine plant only and flat hand plant only.

Responsive

ResponsivePossibly

Responsive

LOBLOLLY PINE YEAR 7

CONTAINERIZED SEEDLINGS

• Loblolly pine– Expansion of the

planting season– Perched water tables– Northern movement– Western movement– Interplant different

genetics

Jimmie Yeiser * University of Arkansas at Monticello

MACHINE PLANTING

• With supplements– Water– Fertilizer– Root starter– Insecticides

• Two row planters• Containerized seedlings

Jimmie Yeiser * University of Arkansas at Monticello

SITE AMELIORATIONRIPPING

• Loblolly pine– Upland, rocky sloping

sites– Facilitate planting for

increased production and survival

– Capture surface water

Jimmie Yeiser * University of Arkansas at Monticello

SITE AMELIORATIONBEDDING

• Loblolly pine– Poorly drained sites– Improved drainage for

increased survival and growth

Jimmie Yeiser * University of Arkansas at Monticello

SITE AMELIORATION Combination Plow

For sites with compaction and drainage.

Various treatments to perform their respective task

5n1 is the most sophisticated of which I am aware

Jimmie Yeiser * University of Arkansas at Monticello

SITE AMELIORATION

• Eco-till– Upland/transition sites with a pan and not needing

bedding. Less costly and site disturbance than a combination plow, harder to see the trench, drainage in low spots may be an issue.

• Unknown (Mulch Till)– Sites with deficient organic matter and needing tillage.

Reduced disturbance.

Jimmie Yeiser * University of Arkansas at Monticello

WEED CONTROL

• Still screening chemistries• Same chemistry• More timings of the

products developed for specific timings

Jimmie Yeiser * University of Arkansas at Monticello

Weed ControlGood Answers Lacking

Jimmie Yeiser * University of Arkansas at Monticello

ASSESSING OPTIONS

• Consider the new treatment contribution within the entire silvicultural system

• Harvest• Debris management• Tillage Genetics Yield• Weed control Planting stock• Nutrition Planting spacing• Thinning• Harvest

Jimmie Yeiser * University of Arkansas at Monticello

CLOSING• Thank you for the privilege of speaking with you

today.• I hope that something I said today will cause you

to reflect on your silvicultural program as it pertains to:

• Improved deployment strategies of genetic material for improved yield and health

• Improved site quality for higher realized genetic performance

• Improved integration of treatments for improved yield and health

Jimmie Yeiser * University of Arkansas at Monticello

THANK YOU