保护耕地与我国农业可持续发展

我国耕地存在的主要问题是数量减少,质量下降,其原因可归结为掠夺式经营,制度安排不合理,生产,经济发展与土地资源协调不力。结果导致粮食总产减少,危及农业可持续发展,因此应创造良好的政策环境和保障制度推动农业技术进步,提高耕地的产出能力,认真贯彻执行新的《基本农田保护条例》,从生产技术和生产方式上保证农业的可持续发展。     

江西省耕地资源现状及保护对策的研究

江西是我国的一个农业大省,其耕地资源的状况与江西省农业发展休戚相关.本文探讨了江西省耕地基本状况,分析了耕地减少的基本类型,并提出了保护耕地的基本对策,以便能阻止耕地资源的退化,确保农业的可持续发展.     

石家庄市耕地总量动态平衡与可持续发展研究

耕地资源的有限性和社会经济发展对耕地需求的不断膨胀,已成为我国农业乃至整个国民经济发展的一大隐忧。石家庄市过高的耕地人口承载量、较高的耕地生产力以及较高的垦殖指数和有限的耕地后备资源,致使石家庄市人口与耕地的逆向发展这一矛盾更加突出。在对耕地减少的时空分布及其严酷事实宏观评析的基础上和在对适度人口容量与可持续发展对耕地需求规模的预测前提下,本文提出了石家庄市实现耕地总量动态平衡与可持续发展的具体对策和实施设想     

实施可持续发展战略是农业生产现代化的必由之路

我国农业生产现代化面临可持续发展的挑战。耕地的高强度开发和不合理利用使土壤结构受到严重损害,当务之急是发展绿色产业,走“生态农业”发展之路;推行节约资源,环境友好型的农业生产模式。     

中国耕地资源的可持续利用

人多地少是我国的基本国情，当前，我国耕地锐减、质量恶化，严峻形势。这种状况严重威胁着我国农业和经济社会的可持续发展。保护耕地。实现耕地可持续利用非常重要，非常紧迫。必须采取法律、行政、经济、技术等方面的综合措施来实现我国耕地的可持续利用。     

我国耕地保护面临的困境及其对策

2008年中国耕地资源总量为12171.6万公顷,占世界耕地总量的7.8%,人均耕地为0.0916公顷,为世界平均水平的38.2%。1997-2008年间,中国耕地减少量为1229.89万公顷,年均减少102.49万公顷。尽管中国实行最严格的耕地保护政策与措施,并取得了很大的成效,然而却面临着快速城市化与工业化发展、农业结构调整与生态环境保护等因素的挑战。借鉴其他国家耕地保护的成功经验,创新耕地保护的方法与手段,注重耕地质量与灌溉条件的改善,是中国耕地保护与可持续发展的关键。     

我国农业生态系统退化概况

农业生态系统退化是阻碍农业进步的障碍之一,它使农业资源日益枯竭,农业可持续发展失去生态基础。本文从土壤退化、土壤污染、水土流失及土壤荒漠化等四个方面论述了我国农业生态系统退化的概况与特征,提出恢复植被、使用绿色农药减少建设侵占耕地是遏止中国农业生态系统进一步退化的有效途径。     

浅谈吉林省粮食生产的可持续发展

吉林省是我国重要的粮食产区,所以吉林省的粮食生产的可持续性不仅关系到吉林省自身的发展,还影响到了国家的粮食安全,本文从水资源、耕地资源和农用科技三个方面探讨了农业粮食生产的可持续发展。     

论九龙县农业生态环境与农业可持续发展

该文首先论述了农业生态环境与农业可持续发展的关系；然后针对九龙县农村能源浪费严重，耕地肥力下降，抵抗自然灾害能力低，水土流失严重，耕地污染问题突出等存在的问题，分析了造成严峻问题的原因，提出了保护九龙县农业生态环境，促进农业可持续发展的对策建议。     

扬州市耕地资源的特点与可持续利用的对策

分析了扬州市耕地资源的特点和动态变化,指出扬州市耕地资源减少的主要原因是农业建设,非农建设和农业结构调整占用耕地,提出了扬州市耕地资源可持续利用的对策。     

卡思卡特城堡

It is worthy of noting that, whilst Crookston Castle witnessed the earlier and happier portion of Mary's variegated life,     

不同的吃喝玩乐

一、吃和喝吃苹果 eat an apple, 吃药 take medicine,吃糖 have some sweets,吃饭 have one's meals,吃馆子 dine out,吃惊 be surprised/     

漏洞百出的教育

Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help?     

Western and Eastern culture differences in commercial field

The communication of people partially is the communication of cultures. Culture has a direct effect on international commercial activities in all aspects. Different conceptions about time, space, equality, law and the like, lead people to deal with things in different ways. So to know cultures of the counterpart is to facil-itate our enterprises so as to have a smooth and successful communication in commercial activity.     

只要努力,不要后悔

There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love.     

浅谈移民问题

Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject.     

Sister Carrie, an Adherent of Desires

Sister Carrie is one of the most controversial characters in American literature.Thought as a "fallen woman" firstly,she was defined as a "new woman" by some critics later. However, by digging into the motivaton behind the whole process of Carrie's "success", the relationship between Carrie and her creator (the author), the social conditions of then American, it can be found that Carrie has never been free-standing on her thought and she has never found her real-sdf even after becoming a famous actress. In a society dominated by mass consumerism Carrie is only an adherent of her own desires. She also is a representative of all those country girls flooded into cities, a symbol and a sacrifice of the urbanization of America in a time countryside was overcome by cities.     

Improvement of one-cycle controller by use of proportional integral differential controller

1.IntroductionOne-cyclecontrolmethod,whichwasproposedaboutonedecadeago[1],hasbecomeanattractivemethodinspecialfieldssuchaspowerfactorcorrection[2-6],switchingamplifiers[7,8],etc.Themainideaofthiscontrollerisbasedonintegrationofdiodevoltageinone-cycleandforcesittobeexactlyequaltothereferencevalue.Themainadvantageofthiscontrollerisitsrealtimeabilitytorejectthevariationofinputvoltage[1].Despitethisgreatability,ithasnogoodperformancesinrejectingofloaddisturbanceandfollowingreferencecommands.Espec…     

风的曲线

Rosco and I wait for the fishermen to return.I sit at a wooden bench near the store at Mt.Baker Resort and watch the clouds change shape. Rosco has my belt around his neck and an eight foot tow chain hooked to a tree. Dogs must be on a leash. Ducks and rabbits are loose.