Wheat spring management pay attention to water and fertilizer

Watering From a water-saving perspective, it is recommended to apply spring irrigation to wheat in two fields. For normal wheat fields that have already been watered with frozen water, it is not advisable to re-apply green water if the soil conditions are good. The optimal time for spring irrigation is during the jointing stage of wheat, which typically occurs from late March to early April. The second irrigation should take place during the heading and flowering period, usually from late April to early May. The exact timing depends on the moisture level of the soil and local conditions. If irrigation facilities are available and the weather is dry, three irrigation sessions can be carried out. Fertilization When selecting fertilizers, low-yield wheat fields can benefit from applying single nitrogen fertilizers such as urea or ammonium bicarbonate. For medium and high-yield fields, it is recommended to use nitrogen and potassium topdressing based on soil testing and formula fertilizer programs. Specialized nitrogen and potassium topdressing follows the nutrient requirements of wheat, focusing on the proper ratio and form of nutrients. Experiments have shown that most soils have low potassium levels, and using only nitrogen-based fertilizers like urea or ammonium bicarbonate can lead to underdeveloped roots and lodging. Using specialized nitrogen and potassium topdressing helps promote root development, improve resistance to lodging, drought, cold, and disease, and increases the 1000-grain weight, significantly boosting yield. Compared to using urea alone, applying nitrogen and potassium topdressing at the same cost can increase production by 50 to 100 kg per mu. The proportion and content of nitrogen and potassium topdressing vary depending on the soil's potassium deficiency. Common formulations include 30% (25-0-5), 30% (22-0-8), and 30% (20-0-10). It is recommended to apply 25–30 kg per mu, adjusting based on the specific needs of the field. Fertilization Timing: 1. For weak wheat seedlings, spring management should focus on promotion. Apply green water along with fertilizer during the first irrigation, and apply the second dose during the jointing stage. 2. For average wheat fields, the spring management should balance promotion and control. Fields with poor soil fertility can receive two topdressings during the jointing stage, while fields with strong growth and fertile soil should be fertilized after the first internode has formed. 3. For strong-growing wheat fields, spring management should focus on control. Fertilization should be applied at the end of the jointing stage, avoiding excessive topdressing that could delay maturity. Author: Li Yan Road Source: China Agriculture News Network

Photocell For Street Lighting

A photo cell, also known as a photocell or light-sensitive resistor, is an electronic device that detects and measures light levels. It is commonly used in various applications such as automatic lighting systems, security systems, and photography equipment.
The main advantage of a photo cell is its ability to automatically respond to changes in light intensity. When exposed to light, the resistance of the photo cell decreases, allowing current to flow through it. Conversely, in the absence of light, the resistance increases, restricting the flow of current. This property makes photo cells highly efficient in controlling lighting systems, as they can automatically switch lights on or off based on the surrounding light conditions.
Another advantage of photo cells is their reliability and durability. They are designed to withstand harsh environmental conditions and can operate effectively for long periods of time without requiring maintenance. Additionally, photo cells have a fast response time, allowing them to quickly adjust to changes in light levels.
Furthermore, photo cells offer energy-saving benefits. By automatically controlling the lighting system, they can reduce unnecessary energy consumption by ensuring that lights are only used when needed. This not only helps to lower electricity bills but also contributes to environmental sustainability.
In conclusion, photo cells are versatile devices that provide a convenient and efficient solution for light detection and measurement. Their automatic response to light changes, reliability, and energy-saving capabilities make them a popular choice in various industries.

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