نتایج جستجو برای: land improvement
تعداد نتایج: 424261 فیلتر نتایج به سال:
Land consolidation is an important means to optimize land-use structure and improve the level of intensive economical use land, it also a critical measure coordinate economic social development promote cultivated-land protection. Therefore, scientific advancement land great significance comprehensively rural revitalization build modern agricultural power. In this study, we explore history China...
T he global surface temperature record is constructed by blending sea surface temperature (SST) with air temperature over land and ice (see also section S1 of the supplement , which is available online at http://dx.doi.org/10.1175/BAMS-D-15-00251.2). Both SST and land air temperature require adjustments to account for changes in, for example, depth or height of measurement, instrumentation, and...
Introduction The hill environment is characterized by high rainfall and wind speeds and a short growing season of sparse pastures. For the purposes of this paper, land classified for statutory purposes as hill land but which is strictly improved upland or upland capable of improvement is excluded from the discussion. The objective here is to examine the effects of nutrition on performance with ...
The land improvement project will level the unused through mechanical construction, which is conducive to eliminating terrain slope and reducing surface runoff. At same time, agricultural measures such as field management protective cultivation can effectively conserve water soil, especially in favor of increasing content soil nutrients organic matter. In addition, it an important means ensure ...
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