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
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:
Secondary tillage: objectives:
Seedbed prep.: objectives:
Conservation tillage: objectives:
No-till planter: objectives:
IV. Examples of planting methods:
no-till planting -
ridge (raised bed)
conventional tillage/planting -
twin-row or bed planting
stale seedbed planting
Read the summary section at the end of the chapter.