2. SEED TESTING FOR QUALITY ASSESSMENT
Name :– Deen Dayal Chaudhary
Class :- BSc . Agriculture 2nd year
Roll No .:- 1929150
subject:- Seed technology
Subject code :- BSAG-406-19

3. CONTENT
 Introduction
 Objectives
 Quality Assessment Test
 Role Of Seed Testing In Labourites

4. Introduction
Seed testing is determining the standards of a seed , physical purity , moisture ,
germination and thereby enabling the farming community to get quality seeds
 Testing of seed evaluate the planting value and the authenticity of the certified lot.
 Seed testing is required to assess the seed quality attributes of the seed lots which
have to be offered for sale.

5. OBJECTIVE OF SEED TESTING
Their sustainability for planting.
To identify seed quality problems and their probable causes.
To determine if seed meets established quality standards or labeling specifications.
Establish quality and provide a basis for price and consumer discrimination among lots in the market.
To determine the need for drying and processing and specific procedures that should be used.

6. Quality assessment test
 Seed moisture test
 seed germination test
 seed viability test
 physical purity test
 seed vigor test
 seed health test
 grow out test

7. Seed moisture test
To determine the moisture content of seed by methods suitable for routine use
The moisture content of seed sample is the loss in weight when it is dried in accordance
with 1STA rules.
 seed content 30 % moisture

8. Seed germination test
 Field planting value of seed lot
 compare the value of different seed lots
% Of seed that produce healthy root & shoot
 Temp. Range 18-22֯֯ C
 varies from 7-25 day
 cereals 7 days
 G % = X 100
Total no of seed germinated
Total no of seed planted

9. Seed viability test
 the percentage of viable seed which may be expected to germinated
 2,3,5- triphenyl tetrazolium chloride or bromide
V%= X 100
 method
No. of half seed stained red
Total no. of half seed

10. Physical purity test
The percentage of seed belonging to the variety under citification
 Seed sample from seed lot as
I. weed seed
II. other crop seed
III. Inert matter
 purity % = X 100
Weight of pure seed
Total weight of working sample

11. Seed vigor test
 Vigorous seed grow at faster rate tan poor seed under favorable environment .
 In seed vigor test three main point
I. cont. The no of seedlings emerging on the earth day.
II. Fine the germination % of each seed lot .
III. Find out the average seedling length in mm for each seed lot .
 G. I.= ∑
N
d

12. Seed health test
Seed lot which show presence or absence of seed borne pathogen on the surface of seed
Blotter method is used
 5, 10,25 seed can be taken on blotting paper layer
 % of health seed = % G.- ( % PR -% PO)

13. Grow out test
 periodic genetic purity test by grow out test is must for seed production
Grow out test is to make sure that they are be maintain in true from
Compulsory for
manual hybrids
Parental lines

14. Role of Seed Testing Laboratories
Organization in seed certification and seed quality control programmers.
Serve the producer, the consumer and the seed industry by providing information on seed quality.
Rejection of seed lots or further multiplication or low grade seed in a count of law