校园草坪的护养问题（Nursing problems of campus lawn）.docVIP

校园草坪的护养问题（Nursing problems of campus lawn） Nursing problems of campus lawn Sure, a problem -- a wise look lawn can not only purify the air, but also to provide a sports good to hear or see, for the students of the site. However, now the lawn has begun to appear yellow, alopecia areata phenomenon, which makes students are worried. Why not on the school lawn green, and then find the general method of lawn maintenance, the lawn seasons long green campus, everywhere lush dream, is a valuable and challenging topic. [comment] to determine the subject is the wisdom of the researchers vision, and strive to achieve the needs, feasible, innovative, dialectical unity of the three. Need means that the research subject should be practical, practical, scientific and research. Feasible means that the topic must conform to the basic conditions of the subjective and objective, and it is the subject that the researcher is familiar with, interested in, basic and controllable. The title should not big problem, too much research is not in place, analysis is not thorough, superficial, research value will be greatly reduced. Innovation generally refers to the textbooks do not have, or belong to the integration of several branches of knowledge, or the common things from a new perspective to examine and study, the content of the study has unique achievements. Topics are highly concentrated research content, with pertinent, eye-catching, proper text summary of the dramatic touch. By giving people a look at the subject, it becomes clear and produces interest in reading the full text. If the topic is written with the topic metal ions affecting plants, peoples interest in reading may be greatly reduced. Two, the implementation of the project - the joy of trying (1) preparation for winter - making research plans; 1., the purpose of this study is to understand the influence of trace elements in soil on plant growth through the study of lawn conservation, so as to master the reasonable conservatio