What are good quality seeds? You are given a sample of wheat seeds. How will you select good, healthy seeds for sowing?

Good quality seeds possess specific characteristics that directly impact germination rates, crop vigor, and ultimately yield. High-quality seeds demonstrate high genetic purity (true to variety), physical purity (free from other crop seeds, weed seeds, and inert matter), excellent viability (germination percentage typically above 85-90%), and vigor (ability to establish quickly even under less-than-ideal conditions). They should be well-developed, uniform in size, undamaged, free from disease and pest infestation, and properly matured. Certified seeds from recognized agencies undergo rigorous testing for these parameters and come labeled with germination percentage, physical purity, and variety details, providing assurance of quality that farmer-saved seed may not guarantee.

To select healthy wheat seeds from a given sample, you can employ several practical tests that don't require laboratory equipment. The floatation or salt solution test is the most accessible: dissolve about 2-3 tablespoons of salt in a liter of water and immerse the seeds—healthy, dense seeds sink to the bottom while hollow, immature, or pest-damaged seeds float and should be discarded. The sinking seeds are then washed thoroughly with clean water to remove salt and dried before sowing. Visually inspect seeds for uniform golden-brown color, plumpness, and absence of discoloration, shriveling, or visible insect damage. A simple germination test can be conducted by placing 100 randomly selected seeds between moist cloth or blotting paper, maintaining moisture for 7-10 days, and counting germinated seeds—if fewer than 85 germinate, the seed lot quality is questionable.

Additional selection criteria include testing seed moisture content by biting (properly dried seed should crack rather than dent) and ensuring seeds are from the previous season or at most one year old, as wheat seed viability declines with extended storage. Purchasing certified seed from government agencies or trusted suppliers, though more expensive initially, eliminates much of this uncertainty and typically delivers 10-20% higher yields compared to farm-saved seed of unknown quality. The investment in good seed represents less than 5% of total cultivation costs but influences the success of all subsequent inputs—irrigation, fertilizer, and labor—making seed selection one of the most critical decisions in crop production.