What Makes Soil Good - PowerPoint PPT Presentation

Loading...

PPT – What Makes Soil Good PowerPoint presentation | free to download - id: 687a76-ODFlM



Loading


The Adobe Flash plugin is needed to view this content

Get the plugin now

View by Category
About This Presentation
Title:

What Makes Soil Good

Description:

Analysis of soils assists an agricultural land brokerage professional estimate the economic potential of the land 3-1 What Makes Soil Good – PowerPoint PPT presentation

Number of Views:12
Avg rating:3.0/5.0
Date added: 4 September 2019
Slides: 33
Provided by: Margaret315
Learn more at: http://www.rebac.net
Category:
Tags: good | makes | soil | water

less

Write a Comment
User Comments (0)
Transcript and Presenter's Notes

Title: What Makes Soil Good


1
What Makes Soil Good
  • Analysis of soils assists an agricultural land
    brokerage professional estimate the economic
    potential of the land

3-1
2
Objectives
  • Identify macro and micro nutrients in soil
  • Soil texture, structure, and consistence
  • Identify horizons in soil profiles
  • NCRS capability classification system
  • Resources to analyze agricultural property

3-2
3
Important Concepts for Soils Analysis
  • Four major components of soil
  • Mineral components develop from parent material
  • Organic matter
  • Ingredients that make soil solution
  • Biological Activity
  • Plants draw six macronutrients from soil

3-3
4
Important Concepts of Soils Analysis (cont.)
  • Trace elements or micronutrients
  • N-P-K designation for fertilizer
  • Soil deficiencies develop from shortages
  • Characteristics of soils
  • Texture depends on individual particles
  • Structure groups soil textures

3-4
5
Establishing Soil Texture
  • Coarse soils - loose and very friable
  • Moderately coarse soils - hold together when
    moist
  • Medium soils - feel velvety
  • Moderately fine soils - form clods
  • Fine soils - form hard clods

3-5
6
Soil Structures
  • Four distinct structures
  • Platy soils - flat plate-like soil
  • Prismlike - flat and well defined
  • Blocklike - six-sided blocks of aggregate
  • Spheroidal - granular and round

3-6
7
Consistence
  • Loose - noncoherent
  • Very friable - crush under very gentle pressure
  • Friable - crush under gentle pressure
  • Firm - crushed with moderate pressure
  • Very firm - requires strong pressure
  • Extremely firm - resists crushing

3-7
8
Group Activity 3-1
3-8
9
Acidity
  • Critical to agricultural activities
  • Calcium deficiency contributes
  • Measured by pH level
  • 7 is neutral
  • Most crops prosper with 6.5 to 7 pH

3-9
10
Soil Depth
3-10
11
Slope
3-11
12
Erosion
3-12
13
Horizons
  • Layers determine the characteristics
  • Four major horizons
  • O horizons
  • A horizons
  • B horizons
  • C horizons

3-13
14
Understanding Soil Surveys
  • NRCS
  • System of eight capability classes
  • Suitability of soil for cultivation
  • Classes based on limitations
  • NRCS system includes several subclasses
  • NRCS publishes surveys at the county level

3-14
15
Soil Classes
  • Class I - most desirable
  • Class II - have some limitations
  • Class III - permanent limitations
  • Class IV - marginally suited to cultivation
  • Class V - fewer erosion hazards
  • Class VI - similar restrictions to class IV
  • Class VII - similar to limitations of Class VI
  • Class VIII - cannot be used

3-15
16
Factors limiting Soil Productivity
3-16
17
Factors limiting Soil Productivity (cont..)
3-17
18
Factors limiting Soil Productivity (cont.)
3-18
19
Soil Surveys Contents
  • Soil Map
  • Description of formation
  • Description of soils
  • Use and management
  • Classification of the soils
  • Extensive Glossary

3-19
20
Soil Surveys
  • Assign compound names
  • First name indicates soil series
  • Second name indicates texture
  • Characteristics common to subject area
  • Permits identification of soils
  • Quality and detail of information varies

3-20
21
Agricultural Production Capabilities
  • Production depends on structure
  • Dominant textures
  • Topsoil depth
  • Rooting depth
  • Soil fertility
  • Slope characteristics

3-21
22
Soil Capability Classes
  • Iowa State University Corn Suitability Ratings CSR

3-22
23
Soil Analysis
  • Should draw on various sources
  • Indicate the history of the property
  • Include local county extension agent information
  • May include USDA information
  • Information from state level agricultural offices
  • Begin with a set of maps

3-23
24
Topography Examination
  • Irrigation
  • Methods of assigning water rights
  • Impact of water rights on property value
  • Drainage - surface or subsurface
  • Slopes
  • Erosion potential

3-24
25
Group Discussion
3-25
26
Module 3 - Review
  • Understand the composition of the ideal soil and
    how it supports agricultural production
  • Mineral material
  • organic matter
  • water
  • air
  • 45,25,25,5

3-26
27
Module 3 - Review
  • Identify the macro and micro nutrients available
    in soils
  • Nitrogen, Phosphorus, Potassium, Calcium,
    Magnesium, and Sulfur
  • Iron, Manganese, Copper, Zinc, Boron, Molybdenum,
    Chlorine, Cobalt

3-27
28
Module 3 - Review
  • Understand the concepts of soil texture,
    structure, and consistence
  • Coarse to Fine
  • Platy, Prismlike, Blocklike, Spherical
  • Loose to Very Fine

3-28
29
Module 3 - Review
  • Identify the horizons occurring in soil profiles
  • O, A, B, and C

3-29
30
Module 3 - Review
  • Understand the Natural Resource Conservation
    Service (NCRS) capability classification system
  • Eight Productive capacity Classes

3-30
31
Module 3 - Review
  • Access resources to facilitate analysis of the
    soils of a agricultural property
  • NCRS soil surveys
  • Local Sources

3-31
32
Self-Assessment Questions
  • The four major components of soil are
  • Soil deficiencies develop because of
  • The three main concepts describing soil character
    are
  • The NCRS capability classification system
    includes all of the following except for
  • Limitations on soils in the NCRS system refer to
  • The corn suitability rating (CSR) developed for
    Iowa soils

3-32
About PowerShow.com