The correct answer is: All of the above.
Nitrogen, phosphorus, and potassium are the three major macronutrients that plants need to grow. They are essential for plant growth and development, and deficiencies in any of these nutrients can lead to problems with plant health.
Nitrogen is a key component of proteins, nucleic acids, and chlorophyll. It is essential for plant growth and development, and deficiencies can lead to stunted growth, yellowing leaves, and reduced yields.
Phosphorus is a component of nucleic acids, ATP, and phospholipids. It is essential for energy production, cell division, and root growth. Deficiencies can lead to stunted growth, poor flowering, and reduced yields.
Potassium is a component of proteins, enzymes, and ATP. It is essential for water regulation, photosynthesis, and stress tolerance. Deficiencies can lead to wilting, yellowing leaves, and reduced yields.
In Manipur, the major nutrient deficiencies in soils include nitrogen, phosphorus, and potassium. These deficiencies can be caused by a number of factors, including poor soil management, nutrient leaching, and crop removal.
To correct nutrient deficiencies, farmers can apply fertilizers or manure to their fields. They can also rotate crops to avoid nutrient depletion. In addition, they can use cover crops to help improve soil health and nutrient retention.
By taking these steps, farmers can help to ensure that their crops have the nutrients they need to grow healthy and productive.