Seed Conditioning, Volume 2: Technology--Parts A & B, 1st Edition (Hardback) book cover

Seed Conditioning, Volume 2

Technology--Parts A & B, 1st Edition

By Bill Gregg, Gary Billups

CRC Press

1,000 pages

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Hardback: 9781578086085
pub: 2010-04-08
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pub: 2016-04-19
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Seed conditioning removes undesirable material including debris and stray seeds from selected raw harvested seed, so as to create planting seed that delivers high yielding crops. This two-volume set provides a major up-date of previously published work. It describes the essential information needed to understand this process and the machinery involved. It describes the machines available to seed conditioners and explains how they can be installed, operated, adjusted, and maintained to give complete and precise separations for many years.

All the machines are described in sufficient detail, sometimes with the help of models to enable the conditioner to get good results. The book also details the operating sequence used to properly prepare seed before going into each machine.

Organized in a logical sequence, it catalogs all the entire field of seed conditioning, to help seed managers, specialists, and conditioning operators reduce loss of good seed while improving seed quality and honing the efficiency of their operations.

Table of Contents

Seed Quality

Supplying High Quality Seed

Role and Principles of Seed Conditioning

Handling Bulk Seed

Receiving Raw Seed

Determining Conditioning Requirements and Lab Mode Cleaning

Seed Moisture

Drying Seed

Moving Seed in Conditioning

Bucket Elevators

Airlift Elevator


Surge or Hopper Feed Bins

Extracting Vegetable Seed

Precleaning and Scalping


Brush Machine


Corn (Maize) Shelle


Cottonseed Delinting

Peanut (Groundnut) Sheller

Basic Cleaning—Air-Screen Cleaner

Length Separators

Gravity Separation


Width and Thickness Grading

Roll Mill

Magnetic Separator

Color Sorter

Aspirators and Pneumatic Separators

Spiral Separator

Draper (Inclined Belt) Separator

Table Separator

Picking Tables or Belts

Vibrator Separator

Friction Separator

Buffel Grass Seed Cleaners

Buckhorn Machine

Timothy Bumper Mill

Horizontal Disk Separator

Horizontal Blower Separator

Brine and Flotation Separations

Needle Cylinder Separator

Dockins Separator

Electrostatic Seed Separator

Resilience Separator


Installing Conditioning Machines

Controls and Control Systems

Operating and Monitoring Machines

Seed Treating

Seed Coating and Pelletizing

Dehumidified Drying



Forming Clean Seed Lots

Vaporproof Packaging

Handling Cleaned Seed

Cleaning Sequence

Small-Scale and Portable Seed Cleaning

Designing a New Conditioning Line

Mobile Cleaning Facilities

Seed Priming

About the Authors

Dr. Bill Gregg has managed seed conditioning programs, done research on development and design of machines, helped manufacturers of equipment, written operation and maintenance manuals, trained managers and operators, and helped design and install many seed plants in several countries.

Gary Gillups is President of Crippen International which has installed seed plants in all continents except Antarctica. The level of technology provided ranges from simple portable equipment to large fully-automated conditioning plants for organizations ranging from small-to-large private companies to governments and international agencies.

Subject Categories

BISAC Subject Codes/Headings:
SCIENCE / Life Sciences / Botany
SCIENCE / Life Sciences / General
TECHNOLOGY & ENGINEERING / Agriculture / General