Solving Geography Class 12 Exercise 23: Analyzing Agricultural Structural Shifts

Solving Geography Class 12 Exercise 23: Analyzing Agricultural Structural Shifts

Exercise 1 (page 98 Geography Class 12 textbook): Given the following data table:

Table 23.1. Production Values of Agricultural Sector (based on 1994 comparative prices)

(Unit: billion dong)

a) Calculate the growth rate of agricultural sector production values by crop group (taking 1990 as 100%)
b) Based on the calculated data, plot on the same coordinate system the lines representing the growth rates of production values for each crop group.

* Solution:

a, Data Processing

GROWTH RATE OF PRODUCTION VALUE OF AGRICULTURAL SECTOR BY CROP GROUP (BASED ON 1990 = 100%)

b, Line Chart
c) Observations
· From 1990 to 2005, the production value of the agricultural sector by crop groups increased steadily.
· Industrial crops experienced the fastest growth rate. Within 15 years, they increased by 382.3%, with the highest increase during 1995-2000 (144%). This was followed by vegetables and legumes. These two crops exhibited growth rates higher than the average...
· Cereals, fruit trees, and other crops showed lower growth rates compared to the average.
· There is a close relationship between growth rate and structural shift. Industrial crops and vegetables and legumes have growth rates higher than the average, hence their proportions tend to increase. On the other hand, cereals, fruit trees, and other crops have growth rates lower than the average, leading to a decrease in their proportions.
· The structural changes in the production value of the agricultural sector indicate:
· In cereal production, diversification of food products is evident, with an emphasis on vegetable and legume production.
· The strengths of tropical agriculture, particularly land and climate, are being increasingly utilized with efficiency.
· Industrial crop production has seen the fastest increase, driven by the expansion of areas specialized in industrial crops, especially tropical industrial crops.
 

Exercise 2 (page 99 Geography Class 12 textbook):

Analyzing the following data table

* Solution:

To analyze the trends in annual and perennial industrial crop cultivation areas from 1975 to 2005, and to address question (b), data processing is required, resulting in the following table:

STRUCTURE OF INDUSTRIAL CROP CULTIVATION AREA (1975 - 2005) (%)

a. Analyze the trends in the changes in the area of annual industrial crop cultivation compared to perennial industrial crops from 1975 to 2005. Both areas of annual and perennial industrial crops increased. The area of perennial industrial crops increased significantly (from 1975 to 2005, increased by 1,460.8 hectares, nearly 9.5 times), especially during the period from 1995 to 2000 (increased by 549 hectares; 1.6 times). The area of annual industrial crops increased slower than perennial industrial crops (from 1975 to 2005, increased by 651.4 hectares, 4.1 times); decreased from 1985 to 1990, then experienced significant growth during the period from 1990 to 1995 (increased by 174.7 hectares; 1.32 times). b. Comments on the relationship between the changes in the structure of industrial crop cultivation area and the changes in the distribution of industrial crop production. Changes in the structure of industrial crop area (especially the rapid increase in the proportion of perennial industrial crops in the structure of industrial crop area) are closely related to changes in the distribution of industrial crops, primarily perennial industrial crops (coffee, tea, cashew, pepper expanding distribution) and the establishment, development of specialized industrial crop areas (mainly in the Central Highlands and Southeast regions).