Buying new seeds every season began with hybrid crops in the 1920s. "Today, hybrid seed production is predominant in agriculture and home gardening, and is one

Buying new seeds every season began with hybrid crops in the 1920s. "Today, hybrid seed production is predominant in agriculture and home gardening, and is one of the main contributing factors to the dramatic rise in agricultural output during the last half of the 20th century. In the US, the commercial market was launched in the 1920s, with the first hybrid maize. All of the hybrid seeds planted by the farmer will be the same hybrid while the seeds from the hybrids planted will not consistently have the desired characteristics. This is why hybrid seed is constantly repurchased by growers for each planting season." http://en.wikipedia.org/wiki/Hybrid_seed http://en.wikipedia.org/wiki/Hybrid_seed