Land use relates to the tangible benefits of our farmer's production. Therefore, we will use land area measuring instruments and other scientific instruments to accurately measure the land area in order to protect the peasant's tangible interests. Today, we mainly deal with land use and management. Some of the questions are simply analyzed. The role of land use in the land science discipline system Due to the incomparable importance and particularity of land and land use issues to human society, research work on land in China has advanced by leaps and bounds in the past 10 years. The current sub-discipline of land has reached 10 Multiple gates (if further subdivided, even more than 20 gates) form a subject group in the field of land research - that is, LandScience. Therefore, before constructing the basic framework of land use, it is necessary to analyze the status of land use in the land science discipline system. Since the 1990s, the land science community in China has conducted extensive discussion on land science. Most scholars believe that land science is a general term for the subject system of land knowledge, or a group of disciplines composed of related land disciplines. In the system of land science disciplines (or groups of disciplines), there must be one leading discipline as the core of this discipline system. The research task of the leading discipline is the core of the overall research task of the discipline system of land science, and the development of the leading discipline provides the major research tasks for other disciplines. In the construction of the land use research content system, the following three principles need to be considered: (1) Embody the basic tasks and content of the discipline and highlight the core tasks; (2) Consider the inheritance, development and innovation of disciplines; (3) The need to safeguard the national land management and realize the strategy of sustainable land use. Based on the above-mentioned existing land use research content system, we built a new type of land use study in accordance with the basic tasks of the discipline and the country’s implementation of the scientific development concept and the implementation of the land sustainable use strategy for land use disciplines. Research content system. The basic framework of this system is based on the theory and evaluation methods of sustainable land use under the guidance of the scientific concept of development and the concept of sustainable development. It is based on the theory of related disciplines, supported by scientific research methodology and "3S" technology. Based on the time scale of land use research, it is vertically divided into three basic parts: past land use research, current land use research, and future land use (namely, land rational use) research. system. Dibenzoylmethane (DBM) is a chemical substance with a molecular formula of C15H12O2 and a molecular weight of 224.25. Dibenzoylmethane is used as a co-stabilizer in the calcium/zinc hydroxy acid salt stabilization system for the manufacture of PVC mineral water bottles. , an analytical reagent for the determination of carbon disulfide and thallium. Dibenzoylmethane is a colorless rhombic flaky crystal, easily soluble in chlorohydrin and chloroform, soluble in sodium hydroxide solution, insoluble in sodium carbonate solution, very slightly soluble in water. Dibenzoyl Methane,Dibenzoyl Methane For Plastic Heat Stabilizer,Dibenzoyl Methane Dbm,Pvc Heat Stabilizer Dibenzoylmethane Shandong Hanteng International Trade Co.,Ltd , https://www.dibenzoylmethane.com