Plants that don't produce plantable seeds have a big advantage: some seed is spilled every harvest. Farmers rotate crops, if you have corn gorwing in your soybean field that is one of the worst weeds you can have. Not only does the corn take nutrients you intend for your soybeans, it is also providing a host for any corn disease in your field that you are hoping die off now that it doesn't have corn to live in.
Plants that don't produce plantable seeds have a big advantage: some seed is spilled every harvest. Farmers rotate crops, if you have corn gorwing in your soybean field that is one of the worst weeds you can have. Not only does the corn take nutrients you intend for your soybeans, it is also providing a host for any corn disease in your field that you are hoping die off now that it doesn't have corn to live in.