Mechanical Mod Kit Series
Mechanical MOD Kits of Various of products, including AV Mods Kits,Resin Mod Kits,Brass Mod Kits,Copper Mod Kits and Stainless steel Mod Kits with various colors, provide product pictures and basic parameters, we are committed to supply chain management, we are a professional Chinese manufacturer of Mechanical Mods Kit and we are looking forward to your cooperation.
Mechanical Mod Vape,Pen Starter Kit Vape,Stab Wood Mod Vape,Pc Material E Vape Dongguan Marvec Electronic Technology Co.,Ltd , http://www.marvec-cn.com
Kind of pollution-free vegetables
With the improvement of people’s living standards, people’s demand for pollution-free vegetables is increasing, and many farmers are trying to plant them. At present, our so-called pollution-free vegetables refer to Grade A green vegetables. The following describes the main cultivation techniques. First, the selection of varieties to adapt to local ecological conditions, there is a market demand for high-quality, resilience varieties. Before sowing (or planting), seed (or seedling) selection must be carried out. Seeds need to be large, full, disease-free, more than 85% buds, and more than 98% pure. Seedlings should use healthy seedlings with well-developed root system, strong seedlings, good color, and no disease. Second, land selection should choose land that has no pollution and good ecological conditions. The soil should be fertile, well-ploughed, flat, and not easy to accumulate water, with good irrigation conditions and a sustainable production capacity. Third, crop rotation and soil preparation require more than three years of rotation for planting varieties. The former must select unused herbicides or high-toxicity, high-residue insecticide plots. The site preparation should be deep-rooted to facilitate warming up. Fourth, fertilization choose to use more than 30,000 kilograms of cooked and harmless farmyard fertilizer per hectare, can use manure, manure, green manure and crop stalks. Allows the use of commercial organic fertilizers, humic acid fertilizers, and microbial fertilizers. The general principle of fertilization is to apply more farmyard manure and less fertilizer, and the ratio of organic nitrogen to inorganic nitrogen cannot exceed 1:1. Phosphorus fertilizer is less than 225 kg per hectare and potassium fertilizer is less than 90 kg per hectare. The use of nitrate nitrogen fertilizer is prohibited. The last fertilization must be carried out 30 days before harvest. Fifth, drug selection is strictly prohibited the use of highly toxic, highly toxic, high-residue pesticides, such as dicofol, insecticides, avermectins, carbofuran and so on. Herbicides and organically synthesized plant growth regulators are prohibited. If the fungal diseases occur in vegetables, use can be made of kasugamycin, Jinggangmycin, and Nongkang 120. Bacterial diseases can occur with Bacillus thuringiensis, Bacillus cereus, etc. Controlling aphids can use Liuyangmycin, Huaguangmycin, sulphur suspoemulsion and so on. Pesticides such as pyrethrin and rotenone can be used for pest control. China Agricultural Network Editor