fields, complete the table.
The Parameters for Comparison
Ecosystems
Type of ecosystem
Meadow
Field
Components
The current selection
The diversity of species
Food chains
Energy source
Circulation of elements
Stability
Currently, there is a concern among plant breeders with how to find a suitable system of soil using and maintain soil fertility.
Russia and other countries use a range of techniques to preserve soil fertility. There is a No-Till system in Texas, which implements conservation tillage.
There are many different options for crop rotations which include various types of crops, such as culture of the cold and warm period.
2. - Individual work with the text in 33.
3. To answer the questions.
1. Why is soil quickly exhausted in agricultural lands?
2. What are the ways of returning nutrients to the soil?
3. What are the ways of improving the productivity of agricultural lands?
Object: The researchers found out that at 1 m small cabbage fields, there are an average of 69 larvae of cabbage butterflies, and at 1 m large fields - no more than one track. And pests are concentrated in the boundary strip of width 30-40 m. Why is the number of insect pests much higher at the edges of fields? What measures can be recommended to reduce the pest?
Generalization and systematization of knowledge.
Conclusion on the theme.
- Work in copybooks with the concepts of "Agroecosystems", "Soil fertility", "Moldboard less Soil," "Crop rotation", "Green manure"
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