In agricultural growth, we often need to trim and cultivate the farmland. What impact will there be on the soil nutrients of farmland when we farm and plough the farmland? Or do you need to pay attention to which areas can reduce the destructiveness of the soil when the farmland is leveled? Today, we use soil nutrient tester to measure the soil nutrients before and after farmland finishing, and then determine the impact of farmland land leveling on soil nutrients.
In the global soil, there is a large amount of carbon in the form of organic matter. On average, it is about three times as much as the carbon stock of vegetation (5.5×1017g) and twice as much as the atmospheric carbon stock (7.5×1017g). Therefore, the soil cannot be ignored. The huge carbon pool. It is estimated that the historical loss of soil organic carbon in the United States is 5×1015 g, but after the adoption of protective measures, the annual increase in farmland soil organic carbon is about 1.4×1014 g. Therefore, the soil carbon pool has a strong ability to fix carbon. However, with the increasing influence and interference of human activities on soil carbon pools, the accelerated release of organic carbon into the air may increase global climate change. As land formation progresses in China in large scale, this strong disturbance to soil carbon pools will inevitably break the carbon balance of the original ecosystem and increase the impact of human activities on soil carbon pools.
Land leveling is the reorganization and re-optimization of land resources and their utilization methods. While improving land use conditions, it must also pay attention to the ecological and environmental effects it brings. At present, the study of the dynamic changes of carbon storage in terrestrial ecosystems during the consolidation process from the perspective of land leveling is rare. Most of them focus on the analysis of the impact of land use on carbon storage. From a theoretical point of view, land leveling may destroy the physical structure of soil and lead to the formation of carbon sources. It may also result in carbon sequestration by improving soil quality. Therefore, it is of great significance to study the effect of land leveling on carbon storage in farmland soils. In particular, for China, which is experiencing an economic take-off phase, it is necessary to find alternative means to reduce or offset carbon emissions by reducing the unit GDP by 40% to 45% on the basis of the 2005 base period by 2020. It is of great practical significance to study the effect of land leveling on surface soil carbon fixation in farmland.
A load moment indicator is an instrument used in determining whether a certain load could be carried by the Tower Crane
or not. When the operator runs the tower crane, load moment
indicator could show the comprehensive working condition of the tower
crane, which help him run the tower crane safe and effective.
Models of load moment indicator: RC-A5-I load moment indicator, RC-A5-I Tower Crane Load Moment Indicator, Load Moment Indicator CXT30.
When more than one set of tower crane work at the same time, Tower Crane Anti-collision Safety System will be required. A multi-function Safety System for Tower Crane integrated load moment indicator with anti-collision & zone protection system and remote online monitoring system. It indicates real time working states of tower crane and tower crane group both in operator cabin and online. In the meantime it combines functions including black box, anti-collision & zone protection.The system is applicable to various types of level-jib and luffing tower cranes. It adopted the most advanced ARM embedded intelligent microprocessor technology, high precision digital azimuth sensor, weighing sensor, angle sensor.which greatly enhanced data processing capability with higher precision and higher stability.
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