Fertilizer is the food of crops. In general, there are many chemical fertilizers, high yields, and good economic returns. However, this is not entirely the case. In the practice of production, it is often not worthwhile to pay attention to scientific work and blind fertilization, resulting in low yield, poor quality, and poor efficiency. In order to obtain the best economic benefits for fertilization, we must master the characteristics of fertilizers. According to the basic principles of fertilization, we must proceed from reality, adapt to local conditions, adapt to local conditions, adapt to the conditions of the crops, and apply scientific fertilization methods.
First, fertilize according to soil fertility
Fertilizing according to soil fertility is also called soil testing and formula fertilization, also called balanced fertilization. In accordance with the principle of lacking what the soil lacks, how much it is lacking, and how much it can make up, it will be used for fertilization.
Soil testing and formula fertilization is simply based on soil testing. Based on the soil fertility, crop manure requirements, and fertilizer effects, based on the rational application of organic fertilizers, reasonable application quantities of nitrogen, phosphorus, potassium, and trace elements are proposed. , fertilization period and methods to achieve the purpose of improving fertilizer utilization and crop yield, and improving the quality of agricultural products.
Second, in accordance with the characteristics of soil fertilization
1 The red soil, brick red soil, yellow soil, yellow brown soil and brown soil in the southern area are acidic or slightly acidic, and it is advisable to use alkaline calcium magnesium phosphate fertilizer for the application of phosphate fertilizer.
(2) In the northern soil, chernozem, chestnut soil, lime-calcium soil and cinnamon soil are mostly alkaline. It is advisable to use slightly acidic superphosphate in the application of phosphate fertilizer.
3 Continuous greenhouses and old vegetable fields that have been continuously fertilized for many years tend to be gradually acidified, and the calcium and magnesium elements are lacking. Phosphate fertilizers should use alkaline calcium magnesium phosphate fertilizers, phosphate rock powder, etc., which can adjust soil acidity, but also supply calcium and magnesium .
(4) Phosphogypsum can be applied to alkaline earths and saline soils characterized by salinization, especially to coastal saline soils, and potassium sulfate should be used for the application of potash fertilizers.
Third, in accordance with the characteristics of crops fertilizer requirements
When fertilizing, it should be rationally applied according to the characteristics of different crops in order to increase the utilization rate of fertilizer and achieve the purpose of high yield and quality of crops.
1 Cereal crops, such as wheat, corn, and rice, require more nitrogen, followed by potassium. Generally, nitrogen fertilizers or high-nitrogen compound fertilizers should be added to the fields, and high-yield fields should pay attention to the application of potash fertilizers.
2 The leguminous plants themselves have root nodules, nitrogen can be taken from the air, and more phosphorus is needed. Low nitrogen and high-phosphorus compound fertilizers should be selected.
3 If tubers and rhizomes such as sweet potato and potato need more potassium, high potassium compound fertilizer should be used.
4 Cotton, hemp and other fiber crops require sodium as a nutrient, making the fiber tight and increasing its strength. It is also a good potassium crop.
5 Tobacco, grapes, apples, tea and other crops should not use chlorine-containing fertilizers.
Fourth, master two key periods of fertilization
Crop critical period of nutrition: generally in the seedling stage, this period is characterized by the fact that the crop needs nutrients is not much, but it is urgent, if the lack of nutrients will have a great impact on future growth and development.
Fertilizer maximum efficiency period: Generally during the vigorous growth period of crops, a large amount of nutrients is required at this time, and the top dressing effect is very good. Such as: corn in the big bell-mouth period, wheat in the jointing stage, booting stage, cotton in the flowering period.
Fifth, master the scientific fertilization method
A complete crop fertilization program consists of three fertilization methods: base fertilizer, seed fertilizer, and top dressing. Basal fertilizers are fertilizers applied before or during the planting of crops. Organic fertilizers are the main fertilizer, and part of the fertilizer is often used in combination. Fertilizer is the fertilizer applied near the seed when the crop is sown, mainly for the nutrient used during the seedling period. Top dressing is a fertilizer applied during the growth of a crop. It can timely meet the nutrient requirements in the later stages of the crop. Top dressing mainly uses chemical nitrogen fertilizer. According to the actual situation, the three fertilization methods should be flexible and do not insist on consistent.
Autumn and winter is an important basal application period of fruit trees. Whether scientific fertilization directly relates to the level of fruit production and fruit quality is good or bad. Therefore, attention should be paid to avoiding fertilizer misunderstandings and adopting scientific fertilization measures.
IT02S, is JRT new product in the early 2019, which is a single-point LiDAR sensor, also called tof distance sensor. With a micro size of 46x17x7mm, customers can widely use in many Laser Measurement Solutions. The lidar distance sensor can measure 12m short-range with high frequency up to 100hz. It's great for Unmanned Aerial Systems. If you need us send you data sheet and spec for this products, offering sample as well, pls tell us, thank you.
Accuracy
+/-8cm@ 0.1~3.5m
Measuring Unit
cm
Measuring Range (without Reflection)
0.1-12m
Measuring Time
0.1~3 seconds
Measuring Frequency
100 Hz
Laser Class
Class II
Laser Type
650nm, <1mw, red
Weight
About 5g
Voltage
DC2.5V~+3.5V
Serial Level
TTL 3.3V
Size
46*17*7mm
Operating Temperature
0-40 ℃ (32-104 ℉ )
Storage Temperature
-25~60 ℃ (-13~140 ℉)
IT02S Mini Tof Sensor Module Diagram
Parameters of IT02S:
IT02S – the High performance-price ratio measurement solution
* low power consumption of single transmit and single receive
* small size: 46*17*7mm
* low cost
* proffessional techinical support
2D Laser Distance Sensor,2D Lidar Sensors,Tof Lidar Distance Sensor, Flight Distance Sensor
Chengdu JRT Meter Technology Co., Ltd , https://www.accuracysensor.com