耕作深度

Because of the activity of mankind that do to the transference and retroflexion of grains of soil, the intensity of soil erosion and nutrient losing has been enhanced, whether it is in the flat, farmland or woodland.

2~(137)Cs在土壤剖面中随深度的增加而呈下降趋势，在非耕作土和未扰动的土壤主要分布在土壤剖面的上部，并富集在土壤表层之间。

According to the tillage quality was guaranteed for the minimal tilth depth and the sgnthesize property was guaranteed for the specifed tilth depth.

分析了驱动式圆盘犁耕作深度问题：根据土顺利翻转决定的最大耕深、为保证耕作质量限制的最小耕深以及综合性能最优时的额定耕深。

Compared with upper layers, soil temperatures variation were lag in deeper layer.

所有耕作措施土壤温度随深度的增加出现滞后现象。

It showed that during the sowing time of spring wheat, the variations of soil temperature in three tillages pattern were consistent. The soil temperature that 5 cm under ground of NTS was 0.7~4.6℃ and 1.2~6.1℃ lower than CTS and CTB, respectively.

结果表明，在春小麦的播种期，3种耕作方式的平均日均地温变化趋势一致，均随着土壤深度的增加而减小，且在同一时间NTS的地温小于相同土层CTS和CTB，NTS在5cm处14：00的地温比CTS和CTB分别低0.7~4.6℃和1.2~6.1℃。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。