FAQ - Lucerne

Do you have a question about lucerne and/or rhizobium? We have listed the most frequently asked questions here for you.

What's the difference between lucerne and alfalfa?

Lucerne and alfalfa are actually the same plant, known scientifically as Medicago sativa. The difference lies in the terminology: "lucerne" is the term commonly used in Europe, particularly in the United Kingdom and Australia, while "alfalfa" is the term used in North America. Both names refer to the same perennial flowering plant in the legume family, which is cultivated as an important forage crop for livestock due to its high nutritional value.

How much lucerne should I seed?

The seeding rate depends on the mixture and field conditions. We recommend 25/30 kg/ha. Read more about the sowing recommendations of lucerne.

Why is the use of rhizobium bacteria always advisable?

Rhizobium bacteria are essential for the nitrogen supply to lucerne. Sufficient rhizobium bacteria in the soil make nitrogen fertilization unnecessary. Soil that has never grown lucerne naturally lacks rhizobium bacteria. If lucerne was recently grown, the rhizobium bacteria might still be active, but the population decreases rapidly with crop rotation. Using inoculated seeds introduces a high level of active rhizobium bacteria into the soil. Furthermore, the rhizobium bacteria in Yellow Jacket  Nitrogenerator® enhanced seeds are very close to the seed, maximizing effectiveness.

Why is a high rhizobium content so important?

There is a close relationship between the rhizobium content in the seeds before sowing and nodulation and nitrogen fixation in lucerne crops. A high rhizobium content will lead to more active nodules and better nitrogen fixation.

Why are lucerne seeds with Yellow Jacket Nitrogenerator better than regular, pre-inoculated seeds?

The rhizobium bacteria in Yellow Jacket Nitrogenerator seeds are embedded in a polymer matrix around the seed. This matrix contains additional preservatives and nutrients to extend shelf life and protect the rhizobium bacteria from stress. Consequently, the rhizobium content in Yellow Jacket Nitrogenerator seeds is much higher than in seeds that are only pre-inoculated.

What is the optimal seeding rate for Yellow Jacket Nitrogenerator Seed Enhanced seeds?

Barenbrug recommends a seeding rate of 25-30 kg/ha, which is the same rate advised for regular seeds.

Why is the establishment of Yellow Jacket Nitrogenerator seeds better?

After seeding, the Seed Enhanced seeds are heavier and have better soil contact. The Seed Enhancement attracts and retains moisture, improving seed germination and establishment compared to regular seeds. Yellow Jacket Nitrogenerator contains a nutrient supplement that stimulates seedlings and the activity of rhizobium bacteria. Additionally, the calcium carbonate (CaCO3) in the coating protects the pH value around the roots, resulting in better establishment and higher crop production. Read more about the establishment of lucerne.

How do I control weeds and pests in lucerne?

Control weeds by mowing/topping if they grow above the lucerne, avoid bare spots, don’t cut lucerne too short and avoid damage from traffic by using low pressure tires. Read more about weeds and pests control in lucerne.