Physical Quality: It is the cleanliness of seed from other seeds, debris, inert matter, diseased seed and insect damaged seed. What is seed? Seed testing is done to assess seedlot attributes and determine overall quality and value for seedling production and storage. Cotton is primarily cultivated for its lint or fibre, in other words, lint is the main product of cotton crop. Soybean the highest seed quality parameters was observed in seeds treated with PSB T 1 followed by seeds treated with Trichoderma virideT 2 and Pseudomonas T 3 and the lowest seed quality parameters was recorded in control T 4 as mentioned in the Table 2. Seed yield and quality parameters. As a measure of the cleanness of seed, pure seed is separated from impure seed, and then separately weighed. Seed testing standards are based on scientific evidence and provide set procedures for facilities to conduct tests in a uniform manner and ensure comparable results for seed owners . Improved sunflower seed quality is a prerequisite for the South African oil industry to be globally competitive (Fourie, 1999). Parameters studied These seed quality parameters (1000 seed weight, germination percentage and seed vigour) were determined using the rules set out in ISTA (2007). After this mixture, appropriate samples of seed are drawn for quality assessment. Purity test. Cottonseed oil quality utilization and processing PREFACE Cotton is an important fibre crop of global significance and is grown in tropical and sub-tropical regions of more than eighty countries. The challenge to identify the main factors which affect seed hullability and other seed quality parameters, and to manipulate them in such a way as to produce better quality seed … As a result, seed companies maintain quality control programmes that monitor seed from harvest to purchase. The increment of seed quality parameters with inoculants could be due to the isolates ability The influence of seed quality on crop productivity Mrs. Rita Zecchinelli ... parameters taken into account to determine the market value of seeds. In broad sense, seed is a material which is used for planting or regeneration purpose. An array of ‘traditional’ seed quality tests, including mechanical tests and tests of genetic purity, seed germination and vigour, and seed health tests, is used, and seed quality assessment techniques continue to evolve. The seed with physical quality should have uniform size, weight, and colour and should be free from stones, debris, and dust, leafs, twigs, stems, flowers, fruit well without other crop seeds and inert material. Now, cotton seed oil is also widely used On the contrary, seed quality parameters like seed germination, root length and vigour index were also significantly influenced by harvest time. As a minimum, two samples should be used in each quality test, so that the results can be analyzed, compared, and evaluated. QUALITY SEED AND ITS IMPORTANCE IN AGRICULTURE. The seed testing standards The major seed quality characters are summarized as below. Physical Quality: It is the cleanliness of seed from other seeds, debris, inert matter, diseased seed and insect damaged seed. The chemical seed composition (oil, moisture content, protein and carbohydrate were determine using the rules set out in AOAC (2007). Planting time was significantly influenced onion seed yield and seed yield-related parameters such as umbel diameter, number of seeds per umbel, 1000-seed weight, seed yield per plant and seed yield per hectare (Table 3). Seed quality is the possession of seed with required genetic and physical purity that is accompanied with physiological soundness and health status. INTERNATIONAL SEED TESTING ASSOCIATION (ISTA) www.seedtest.org Unified system to provide the user with good quality seed in respect of: