Dear Dr. Suneel Kumar, Farmyard manure (FYM) is a natural source of organic matter and nutrients, including nitrogen, for plants. The time it takes for plants to benefit from the nitrogen in FYM can vary depending on several factors, including environmental conditions, the composition and quality of the FYM, and the type of crops being grown. Here are some key points to consider:

· Decomposition Rate: FYM needs to undergo decomposition by soil microorganisms before the nutrients, including nitrogen, become available to plants. The decomposition rate can be influenced by temperature, moisture, and microbial activity. In warmer, moist conditions, decomposition may occur more rapidly.

· Microbial Activity: The presence of active soil microorganisms is crucial for breaking down organic matter in FYM. Adequate moisture and aeration in the soil are essential for microbial activity. In well-aerated, healthy soils with a good population of decomposer microorganisms, the nitrogen release process can be faster.

· Crop Type: Different crops have varying nutrient requirements and uptake rates. Some crops may respond more quickly to the nitrogen released from FYM than others. Leafy vegetables, for example, may show a more rapid response compared to perennial crops.

· FYM Quality: The nutrient content and quality of FYM can vary depending on the source and handling. FYM with a higher nitrogen content will release nitrogen more quickly than FYM with lower nitrogen content.

· Environmental Factors: Environmental conditions such as temperature and rainfall can also impact nitrogen release from FYM. Warmer, wetter conditions are generally more conducive to microbial activity and nutrient release.

In general, it can take several weeks to several months for the nitrogen in FYM to become fully available to plants. However, some immediate benefits may be observed due to the presence of other nutrients and organic matter in FYM, which can improve soil structure and overall soil health.

To get a more accurate estimate of when the nitrogen from FYM will be available to your specific crops in your particular field, it's advisable to conduct soil testing and monitor plant growth regularly. Soil tests can help assess nutrient availability and guide fertilization practices. Additionally, proper incorporation of FYM into the soil and maintaining favorable soil conditions (adequate moisture, aeration, and temperature) can help speed up the nutrient release process.

Thank you Very much sir

Suneel Kumar The time it takes for plants to access nitrogen from Farmyard Manure (FYM) can vary widely depending on several factors, but generally, it can take anywhere from 2 to 6 weeks for the nitrogen to become available to the plants. This is a rough estimate; the actual time can differ based on soil conditions, the type of manure, and environmental factors.