Advantages of a high-density orchard can include improved production (e.g., earlier and increased yield, higher fruit quality, improved fruit packout) and efficiencies (e.g., labor, pesticides). Disadvantages can include higher establishment costs and greater need for management (e.g., training, pruning) than in a traditional orchard.
High-density apple production is a relatively new system and most research to-date has been performed in Michigan, Washington, New York and North Carolina. Missouri-specific recommendations for this system are not available, although the system is being widely deployed amongst new apple orchards in the lower Midwest. Networking with local and regional growers, and staying up to date on current research can help guide management decisions in this system.
Site Selection
Location and scale are important for a commercial orchard site. Apple orchards need full sun, well-drained soils and protection from frost and wind. Avoid low areas; rolling land with some elevation can provide frost protection. For wind protection, avoid hill tops or ridges. To help minimize investment costs, avoid land that needs clearing or drainage. Several web-based tools such as the U.S. Department of Agriculture (USDA) National Resources Conservation Service’s (NRCS) Web Soil Survey and MU Extension’s AgSite Assessment Tool can help assess the soil and hydrologic characteristics of a given site.
Scale is important to allow for efficiencies in equipment (when fixed costs are spread over more acres, cost per acre decreases), purchasing discounts for bulk inputs and access to better markets.
Rootstock and Cultivars
Dwarf rootstocks are required for high-density apple orchards. Many factors such as climate, soil type, apple variety, planting system and disease/pest resistance affect rootstock selection. Select scion cultivars that match your end-market needs and grow well in your area. Use a reputable nursery and plan to order well in advance of planting up to two years beforehand.
Source : missouri.edu