Regarding the site foundation and load-bearing capacity, the production workshop floor must undergo hardening and anti-seepage treatment, utilizing a reinforced concrete slab at least 15 cm thick. Areas housing heavy equipment—such as batching bins, mixers, and primary packaging units—require a localized floor thickness of 20 cm to prevent subsidence or cracking caused by prolonged pressure. The floor should feature a slope of 1‰ to 2‰, with drainage channels installed around the perimeter; this prevents water accumulation—critical given the hygroscopic nature of fertilizers—and avoids raw material caking or floor corrosion. Operations directly on soft soil are strictly prohibited; raw material storage areas must also be hardened to minimize the contamination of fertilizer with dust and soil impurities.

Spatial planning and zoning require a workshop clear width of at least 10 meters and a length exceeding 25 meters for small-scale lines (100-ton daily capacity), while large and medium-scale lines with multi-bin batching systems require a minimum workshop width of 15 meters. A vertical clearance of at least 3 meters above the material bins is necessary to facilitate sensor installation and conveyor maintenance. Additionally, 1.5-meter-wide pedestrian maintenance aisles must be reserved on both sides of the production line, along with 5 meters of maneuvering space at both ends. Raw material storage areas must be clearly demarcated; urea, potash, and ammonium phosphate should be stored separately with fire-safety aisles between zones, and stacking heights must not exceed 4 meters to prevent pressure-induced caking.

Ventilation, moisture protection, and environmental standards require the installation of high-capacity ventilation fans to ensure air circulation. Given the hygroscopic nature of fertilizers, the workshop roof must be waterproofed, and walls fitted with moisture-proof layers to prevent rainwater leakage. Provisions must be made for dust extraction equipment at batching and mixing stations, including space for dust ducts and waste recovery areas. Finally, a designated dust collection and storage point is required to prevent airborne dust from polluting the surrounding environment. If an organic-inorganic blended formula is used, a separate storage area must be designated for organic raw materials, isolated from single-nutrient fertilizers to prevent cross-contamination—specifically moisture absorption and caking—thereby ensuring smooth material feeding and precise mixing ratios.