代写论文：城市化及其对农业用地的影响

代写论文：城市化及其对农业用地的影响

表层土壤:土壤的最上部层和最适合农业的目的,因为它富含有机质和生育,寿命长。如果它被侵蚀,被抬出在一段时间内由于自然物理水和风的力量,它将填入排水通道(里斯,1992)。水土流失导致生产力的农业土地的减少,也造成在邻近水体的污染,湖泊和湿地。

测试来评估土壤的丰富:

i)粘土土壤:土壤,如果放在手将保持其形状,当戳它仍将是一种顽固的对象在其原来的形式。

ii)沙:那就是土壤将流出的手就会被打开。

iii)壤土:它是有利于农业的土壤,因为它含有大量的腐烂植物和其它遗物和不包含太多的粘土和沙子。如果它将保存在一方面,它将保持其形状略有戳,它瓦解。

城市化的含义:

(一)社会经济影响:

(二)环境影响:

3)政策影响:

(四)体积密度:

这是一个给定体积重量的土壤。它往往与压实和随深度增加。根的生长受到限制,如果土壤体积密度高于1.6克/立方厘米。

 

代写论文：城市化及其对农业用地的影响

Top soil: It is the upper most layer of the soil and is best for agricultural purposes as it is high in organic matter and is of fertility and has a long life. If it gets eroded and being carried away over a period of time due to natural physical forces of water and wind, it will fill in the drainage channels (Rees, 1992). Soil erosion results in the reduction of productivity of agricultural land and it also contribute in the pollution of adjacent water bodies, lakes and wet lands.
Tests to evaluate the richness of soil:
i) Clay soil: It is that soil which if kept in hand will hold its shape, and when poked it will remain as a stubborn object in its original form.
ii) Sand: It is that soil which will flow out of hand as soon as the hand will be opened.
iii) Loam: It is the soil which is good for agricultural purposes as it contains a lot of decayed plants and other remains and does not contain too much clay and sand in it. If it will be kept in hand, it will hold its shape and when poked slightly, it crumbles.
Implications of Urbanization:
i) Socioeconomic impacts:
ii) Environmental impacts:
iii) Policy Implications:
iv) Bulk density:
It is a weight of soil in a given volume. It tends to increase with compaction and increases with depth. The growth of root is restricted if the soil has a higher bulk density than 1.6g/cm3.