The construction of agricultural high-tech demonstration parks in the process of agricultural modernization is an advanced leader. In the park, environmental factors and management levels are relatively consistent, and the main factor affecting soil productivity is the level of soil fertility. Fertilizer absorption characteristics of different varieties of rice are also different, according to fertility conditions and agronomic measures in different regions (such as small plots), combined with fertility evaluation, soil fertigation and formula fertilization, provide the most various fertilizers and trace elements Good dosage, fertilization time and methods guide farmers to properly fertilize crops without losing time. Soil nutrients are the core part of soil fertility. Comprehensive and objective evaluation of soil nutrient levels is the basis for scientific fertilization, and also the basis for all agricultural technology promotion and precision agriculture implementation. The soil tester plays an important role in the determination of soil nutrients and is also the only way to modern agricultural development.
The selection of participating factors and the classification of grading indicators are the basis and core work of soil nutrient evaluation. This study follows as much as possible the principle of comprehensiveness and dominance, the principle of combining quantitative and qualitative, the principle of accuracy and practicality. Based on the biological characteristics of rice and its special requirements for soil and a large number of investigations and analysis, the following factors were selected for the soil nutrient evaluation in the park: organic matter, available nitrogen, available phosphorus, available potassium, and pH.
Through the determination of the soil tester, the soil nutrient level was objectively evaluated, the quantitative indicators of soil nutrient evaluation were given, and a quantitative method for soil nutrient evaluation was implemented in the computer, providing comprehensive and quantitative evaluation of nutrients. Thoughts. This not only ensures the control of the amount of fertilizer, but also improves the benefits, and it also protects the environment.
Automatic L-Bar Shrink Packing Machine
Automatic L Bar Sealer Bottle Shrink Packing Machine
widely used in pipelining work for large quantity package with high work efficiency, installed with pin hole device, adjustable film feeding system and adjustable conveying table, meets different requirements for different products and it has a kissing device for packing the small products.
1. Introduced into the international advanced technology; using high speed fan motor and lead wind adjustable blowing system to expedite heating up. According to the product's size and output, it can adjust the speed of conveyor belt, flowing volume and temperature.
2. Unique wind adjustable device which can adjust the flowing volume to fit for product's dimension and packing speed.
3. Advanced and special model to heat up centralized.
4. Accelerates the heating time to reduce the power wasting.
5. Hot-wind cycle channel, the structure of which inside tunnel is designed by recycled style to remain the hot-wind circulated in the channel, to prevent energy wasting from the hot-wind leaked out.
L Sealer Machine,Automatic L-Bar Shrink Packing Machine,Automatic L Sealer Machine,L Type Sealing Shrinking Packing Machine
Hangzhou Xiaoshan Wanfeng Mechanical & Electrical Equipment Factory , https://www.hfweldingmachinery.com