An accurate assessment of the quality and survival of your alfalfa fields this spring is essential. This crucial step helps you prevent forage shortages. It also ensures quality feed for your animals. To achieve this, two main methods are recommended: assessing the number of stems and the number of plants.
Sampling protocol
Whether you choose to measure the number of plants or stems, the use of a one-square-foot quadrat is recommended. It should be used to measure the number of stems or plants per square foot. We suggest 10 observations per field. Use a W-shaped path to ensure representative sampling.
Evaluation of the number of stems
To assess the winter survival of alfalfa plants, the number of stems can be counted in the quadrat when the plant reaches a minimum height of 8 cm. Depending on your observations, you can take the following action:
- More than 55 stems per square foot: No anticipated reduction in yields.
- Between 40 and 55 stems per square foot: Yield can vary according to the health of the root system. A healthy root system means minimal yield reduction. However, if more than 30 % of plants have a root health score above 4, expect a significant reduction in yield.
- Less than 40 stems per square foot : It's time to start thinking about prairie renewal.
Evaluation of the Number of Plants
Although less precise in determining the impact on alfalfa yield, the assessment of plant numbers is crucial to maintain at least 5 healthy plants per square foot.
Root System Health Assessment Protocol
For a detailed assessment of the health of the root system, the technical sheet developed by the coordination of advisory services is an essential tool. Should I keep my Luzernières following winter damage?
What to do in case of excessive alfalfa mortality
Faced with a low winter survival rate, the capsule "What to sow when my prairie is damaged" proposes strategies. It also offers practical advice on how to manage the situation effectively.
Discover the Tools of My Forage System
Mon Système Fourrager offers you innovative tools to accurately assess the survival and quality of your alfalfa fields in spring. Among other things, they enable you to assess the condition of your meadows and compare your results with those of your neighbors. Easy to use, they enable data to be easily collected and displayed in the field. register now, it's free and it could revolutionize your grassland management.