Green manure is an effective and sustainable way to improve soil fertility in pistachio orchards. However, it is important to note that its nutrient value is generally lower than that of animal manure. In fact, approximately 2.5 kilograms of green manure provide a nutritional effect similar to 1 kilogram of animal manure.
Despite this difference, green manure can gradually supply nutrients—especially nitrogen—as it decomposes in the soil. It also improves soil structure, increases organic matter content, and enhances overall soil health.
To achieve the best results, select a plant species that grows quickly, requires relatively little water, and is compatible with the irrigation schedule of pistachio orchards. These plants are typically grown between tree rows and incorporated into the soil before they produce seeds. It is also essential to choose species that do not share common diseases with pistachio trees.
Key Points
- 1 kg of animal manure ≈ 2.5 kg of green manure in terms of nutrient value
- Increases soil organic matter and improves soil structure
- Provides a gradual release of nitrogen through decomposition and mineralization
Characteristics of an Ideal Green Manure Crop
- Fast-growing
- High biomass production
- Low water requirement
- Compatible with pistachio orchard irrigation intervals
- Suitable growing period: winter to late spring
Management Recommendations
- Plant between tree rows
- Incorporate into the soil before seed formation
- Avoid damaging flowers and fruits during incorporation
- Select species that do not share diseases with pistachio trees
