2. Manure is to add humus to the soil.
3. If soil is low in nitrogen, legume crops are often plowed under.
4. The aim of using green manure crops was to prevent the leaching of plant nutrients from the soil.
5. Sometimes plant growers have to turn under leguminous plants in order to raise the supply of nitrogen in the soil.
6. In our country we have a lot of areas with highly fertile soil.
7. The soil of our farm is rich in phosphorus and potash.
8. Many important problems are to be solved in agriculture.
9. The value of soil fertility is well known to agriculturists.
10. To increase the yields we have to use barnyard manure and fertilizers.
11. Our plan is to obtain good stands by seeding high quality seed.
12. The value of humus has been recognized since early times.
6. Specify the sentences where the conjunction (« который ») is omitted.
1. The optimum temperature the seed will germinate at varies with different kinds of seeds.
2. The farm our agronomist spoke about is a good producer of forage crops.
3. Cereals that are widely grown in this region are used as food both for man and for livestock.
4. To obtain good stands plant growers should follow the recommendations which are given by the agronomist.
5. The crops farmers grow for plowing under are called green manure crops.
6. We use fertilizers and barnyard manure to supply nutrients the plants have removed.
7. Identify sentences containing verbs with the meaning of obligation.
1. Seed should be sown at a proper rate.
2. If we were asked we should recommend to start harvesting next week.
3. Our farm is to plant legumes on larger area next year.
4. We shall grow more fiber crops in order to obtain more oil.
5. To germinate uniformly seed must be planted at the same depth.
6. At present plant breeders can influence some characteristics of plants.
7. These improved potato varieties have been obtained through hybridization.
8. If the soil is not sufficiently moist, we shall have to irrigate it.
9. Green manures are to be used to increase the yields of crops that will follow.
10. Cover crops should be grown to protect the soil surface.
11. Most vegetable crops should be grown on the soil high in organic matter.
Listening and Speaking Focus
Watch the video and answer the following questions:
1. What is the usual limit of salt per acre?
2. What can farmers do with liquid manure?