1. Swedes, manigolds, fodder roots, hay, lucerne(alfalfa), clover, sainfoin, forage kale, lupines, vetches and similar forage products, whether or not in the form of pellets.

2. Somatic hybrid plants between alfalfa and sainfoin were regenerated by protoplast fusion and culture.

3. Sainfoin seed germination was selected to test the toxicity of crude toxin. The result showed that the crude toxin which was cultured had definite toxicity.

4. In the experiment, the pathogen was isolated from pathogenic and typical spots of sainfoin leaves in the field.

5. Also, the species and population of pollinating insects were found to be the most optimal in the fields of mixed alfalfa and sainfoin.

6. The low rate of sowing, wide space between rows, proper amount of nitrogen and phosphorous and a timely irrigation also had good effect on seed production of sainfoin.