Accurately assessing the quality and survival of your alfalfa fields this spring is essential. This crucial step helps you prevent a shortage of fodder while ensuring quality feed for your animals. To achieve this, two main methods are recommended: evaluating 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
For the approach by the number of stems, the plant must reach a minimum height of 8 cm to count the stems in the quadrat. The actions to take based on your observations are as follows:
- 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
Assessing plant numbers, while less accurate in determining yield impact, is crucial to maintaining 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?
In the event of excessive mortality of alfalfa
Faced with excessive mortality, don't miss our. She offers strategies and practical advice to effectively manage this situation.
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