AGEN 2363.  Chpt. 9 notes.  Tillage Practices for Conservation.

 

I. Tillage objectives:

            - prepare seedbed.  Soil ‘Tilth’ =

 

            - control weeds

            - incorporate residue, fertilizers, lime, pesticides

            - aerate soil

            - raised beds, furrows for irrigation or wind erosion breaks

            - others?

 

II. Soil erosion and water conservation effects of tillage.

   A. Direct effects.

            - tillage erosion: What?  Why?

 

            - organic matter decomposition –

 

            - soil structure degradation/ surface crust enhancement –

 

            - runoff, erodibility –

 

            - fall vs spring plowing/disking –

           

            - soil water evaporation –

 

   B. Indirect effects.

            - soil O.M. levels –

 

            - soil microorganisms –

 

            - soil fertility-

           

            - soil productivity –

 

III. Categories of tillage implements:

            Primary tillage:            objectives:

 

                                                examples:

 

            Secondary tillage:       objectives:

 

                                                examples:

 

            Seedbed prep.:            objectives:

           

                                                examples:

            Sub-soilers:                  objectives:

 

                                                examples:

 

            Conservation tillage:   objectives:

 

                                                examples:

 

            No-till planter:             objectives:

                                   

            Other examples:

 

 

IV.  Examples of planting methods:

no-till planting -

 

flat planting –

 

ridge (raised bed) –

 

plow/plant –

 

strip-till planting –

 

ridge-till planting –

 

mulch till –

 

‘conventional’ tillage/planting -

 

‘twin-row’ or ‘bed’ planting –

 

stale seedbed planting –

 

contour planting –

 

 

 

 

Read the summary section at the end of the chapter.