Accurately assessing the quality and survival of your alfalfa fields this spring is essential. This crucial step will help you prevent forage shortages while ensuring quality feed for your animals. There are two main methods for doing this: assessing the number of stems and the number of plants.
Sampling protocol
Whether you choose to estimate the number of plants or stems, using a one square foot quadrat is recommended to measure the number of stems or plants per square foot. It is suggested to carry out 10 observations per field using a W-shaped route, thus ensuring 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 rods per square foot : No reduction in yields anticipated.
- Between 40 and 55 stems per square foot : Yield may vary depending on the health of the root system. A healthy root system means minimal reduction in yield. However, if more than 30 % of the plants have a root health score greater than 4, expect a significant reduction in yields.
- Less than 40 stems per square foot : It is time to consider the renewal of the prairie.
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 "What to sow when my meadow is damaged" capsule offers strategies and practical advice for effectively managing this situation.
Discover the Tools of My Forage System
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