The farmer said, "One grain will be buried and ten thousand grains will be returned to the warehouse." This simple saying reflects the essence of agriculture—planting a small seed and reaping a large harvest. But have you ever wondered what kind of food or nutrients the crops actually grow in? Through extensive research, scientists discovered that crops require 16 essential nutrients to thrive. These include nitrogen, phosphorus, potassium, sulfur, calcium, magnesium, carbon, hydrogen, oxygen, boron, iron, molybdenum, copper, zinc, manganese, and chlorine. While hydrogen and oxygen are mainly absorbed from air and water, the rest must be supplied through fertilizers to ensure healthy crop growth. Among these nutrients, nitrogen, phosphorus, and potassium are considered macronutrients, required in larger quantities. Sulfur, calcium, and magnesium fall into the category of secondary nutrients, while the rest are classified as micronutrients. Additionally, some elements like silicon are considered beneficial for plant growth and soil health. Common types of fertilizers used in farming include: - **Nitrogen Fertilizers**: These provide the essential nutrient nitrogen, which is crucial for leaf and stem development. Examples include ammonium bicarbonate, urea, ammonium nitrate, ammonia, ammonium chloride, and ammonium sulfate. - **Phosphate Fertilizers**: These supply phosphorus, which supports root development and energy transfer within plants. Common types are superphosphate, triple superphosphate, calcium magnesium phosphate, and others like bone meal and defluorinated phosphate fertilizer. - **Potassium Fertilizers**: Potassium is vital for overall plant health, especially in fruit and flower development. Major types include potassium sulfate, potassium chloride, and potash from plant ash. - **Micronutrient and Secondary Nutrient Fertilizers**: These include fertilizers containing elements like boron, zinc, iron, manganese, copper, and molybdenum. For example, borax is commonly used for boron, zinc sulfate for zinc, and ammonium molybdate for molybdenum. - **Compound Fertilizers**: These contain two or three of the primary nutrients (N, P, K) in one product. Though widely used, they still cannot fully replace organic fertilizers. Combining chemical and organic fertilizers improves nutrient efficiency and soil health. For instance, the "Green Living Machine" organic-inorganic balance fertilizer is an innovative blend that combines the long-term benefits of organic matter with the quick action of inorganic nutrients. It also helps improve soil structure and promote sustainable agricultural practices. Using such balanced fertilizers can lead to better yields, healthier crops, and a more environmentally friendly farming system.

Color Doppler Ultrasound Scanner

"Color Doppler Ultrasound Scanner" is a high-definition black-and-white B-ultrasound plus color Doppler. Its main advantages are: it can quickly and intuitively display the two-dimensional plane distribution of blood flow; it can display the running direction of blood flow; it is beneficial to distinguish between arteries and veins; it is beneficial to identify vascular disease and non-vascular disease; it is beneficial to understand the nature of blood flow ; It is convenient to understand the phase and speed of blood flow; it can reliably detect shunt and regurgitation; it can quantitatively analyze the origin, width, length and area of blood flow. These ultrasound manifestations and parameters play a very important auxiliary role in the diagnosis of clinical diseases.

Color Doppler Ultrasound Scanner,Color Doppler Scanner,Color Doppler Ultrasonic,Laptop Ultrasonic Scanner

Mianyang United Ultrasound Electronics Co., Ltd , https://www.uniultrasonic.com