The quality of tomato seeds depends mainly on seed fullness, germination rate, germination potential and seed purity.
Tomato seed fullness
That is the fullness of the seeds. It is usually expressed in thousands of grains, that is, the mass (grams) of 1000 seeds. The greater the 1000-grain weight, the more full the seeds. Generally, the average 1000-grain weight of tomato seeds is about 3.1 grams.
Tomato seed germination rate
Refers to the percentage of germinable seeds in the sample seeds. The germination rate of tomato seeds is required to reach 90% or more.
Tomato seed germination
Refers to the percentage of germinated seeds in the specified number of days for the test seeds. It is a quantitative indicator of seed germination speed, uniformity and germination concentration. The germination potential of tomato seeds was determined to be 5 days.
Tomato seed purity
Refers to the number of plants that meet the characteristics of this species as a percentage of the total number of plants identified. The purity of tomato seeds is required to be above 95%. Hybrids are classified into primary and secondary species. The purity of the first-class seed is not less than 98.0%, and the purity of the second-stage seed is not less than 95.0%.
Bristles Paint Brush,Paint Bristle Brush,Chemical Fiber Paint Brush,Paint Brush Pet Paint Brush
Ningbo Beilun Gelei Plastic Parts Co.,Ltd , https://www.paintwelltools.com