Safe agricultural products mainly include pollution-free, green, and organic foods. Each category has distinct standards and production requirements to ensure safety and environmental sustainability.
Organic farming requires strict adherence to natural methods. The production area must be free from synthetic chemicals for at least three years, allowing the soil to transition into an organic state. No chemical pesticides, fertilizers, or growth hormones can be used during cultivation. Instead, farmers may use organic fertilizers, biological bacterial fertilizers, and plant- or mineral-based pesticides. Processing must also avoid synthetic preservatives, additives, or artificial colors.
For green food and pollution-free agricultural products, the production environment is tested for air, soil, and water quality before planting. Fertilizer use focuses on organic options with limited chemical support. Farmers are encouraged to use composted manure, microbial fertilizers, and formula fertilization based on crop needs. Chemical fertilizers are allowed only when combined with organic ones, ensuring safe nitrogen levels. Composting must reach high temperatures to destroy pathogens and weed seeds, meeting health standards.
Pesticide management follows a "prevention first" approach, emphasizing non-chemical methods like crop rotation, biological control, and physical barriers. Biological and mineral-based pesticides are promoted, while synthetic options are restricted. Only low-toxicity, low-residue chemicals are permitted, with strict limits on usage frequency. Highly toxic, carcinogenic, or mutagenic pesticides are strictly banned.
The pesticide safety interval is crucial, with different durations depending on the type of pesticide. Proper diagnosis, dosage control, and equipment cleaning are essential to minimize risks. Farmers are advised to monitor pests closely, rotate chemicals, and dispose of waste responsibly to protect both the environment and human health.
Overall, safe agricultural practices aim to produce healthy, sustainable food while preserving the ecosystem for future generations.
Blind Flanges are manufactured without a bore and used to blank off the ends of piping, Valves and pressure vessel openings.
From the standpoint of internal pressure and bolt loading, blind flanges, particularly in the larger sizes, are the most highly stressed flange types.
However, most of these stresses are bending types near the center, and since there is no standard inside diameter, these flanges are suitable for higher pressure temperature applications.
Blind Flange,Blank Flange,Blind Plate,Pipe Blind Flange
Fuyuan Marine Accessories Co., Ltd , https://www.fymarineparts.com