Aims of improved cropping: 

1. The main aims of crop improvement are to increase the productivity of economic product, which is possible by developing high yielding varieties. 

2. The plant crops are subjected to many biotic stresses, such as disease, insects, pests, nematode as well as abiotic stresses, such as draughts, water logging, salinity, heat, cold, etc. 

3. Better quality of crop regarding economic value, protein quality of pulses, oil quality in oil seeds and preservity of vegetables and fruits. 

4. Photo-in sensitive and thermo insensitive varieties of some crops can be cultivated in large areas, as they are not affected by light and temperature. 

5. Crop production, under different environmental conditions, can be stabilised by developing improved varieties of crops. 

6. Desired agronomic traits give higher produce, such as high tillering, tall professedly branching characters of fodder crops, and dwarf character of cereals. 

Examples of the high yielding variety of wheat are: Sonara 64, Hira, Moti, Kalyan Sona and Sharbati sonara. 

High yielding variety of paddy are: Pusa 205, IR 8, Padma and Jaya.