Ответ:

1. Agricultural economics is developing rapidly because it is important for most countries of the world.

2. In order to understand agricultural economics it is necessary to know how crops are sown, cultivated, fertilized, and harvested, how livestock are bred, raised, fattened, and sold.

3. The main characteristic of agriculture is its great dependence on natural conditions, such as climate, weather, soil, etc.

4. Farms of the same type in different regions use different livestock breeds, crop varieties and machinery because they work under different natural conditions.

5. The main reasons for rising efficiency in agriculture in the developed countries are:

a) better agricultural technology;  

b) better capital inputs, such as machinery;  

c) achievements in biological sciences.

6. There are two main factors limiting further rise in productivity in agriculture: 1. increasing energy scarcity as well as the loss of topsoil 2 and water.

7. Farm incomes vary from year to year because they depend on weather conditions and changes in demand for and supply of most farm products.

Объяснение: