Techniques to enhance soil fertility in Mizoram include:

The correct answer is: d) All of the above.

Organic fertilizers and compost are natural materials that can be added to soil to improve its fertility. They contain nutrients that plants need to grow, and they also help to improve the structure of the soil. Crop rotation is a system of planting different crops in the same field each year. This helps to prevent the soil from becoming depleted of nutrients, and it also helps to control pests and diseases. Terrace farming is a method of farming that is used in mountainous areas. It involves creating terraces on the hillsides, which helps to reduce soil erosion and makes it easier to farm the land.

Here are some additional details about each of the techniques mentioned above:

• Organic fertilizers and compost are made from natural materials such as animal manure, plant matter, and composted food scraps. They contain nutrients such as nitrogen, phosphorus, and potassium, which are essential for plant growth. Organic fertilizers and compost also help to improve the structure of the soil, making it easier for plants to take up nutrients.
• Crop rotation is a system of planting different crops in the same field each year. This helps to prevent the soil from becoming depleted of nutrients, and it also helps to control pests and diseases. When a particular crop is planted in the same field year after year, the soil can become depleted of the nutrients that the crop needs to grow. Crop rotation helps to replenish these nutrients by planting different crops that require different nutrients. It also helps to control pests and diseases by disrupting the life cycle of these organisms.
• Terrace farming is a method of farming that is used in mountainous areas. It involves creating terraces on the hillsides, which helps to reduce soil erosion and makes it easier to farm the land. Terrace farming helps to reduce soil erosion by creating a series of small, level areas on the hillsides. This prevents the soil from being washed away by rain or wind. Terrace farming also makes it easier to farm the land by creating a series of small, level areas that are easier to access.