- mass selection: selecting the largest and biggest
- pure line selection: selecting certain traits
- cross-breeding: breeding two plants that have two different desired traits
Tissue Culturing Technology
- Obtain cells from the meristem
- Grow the cells through mitosis. The mass of cell is called a callus
- Apply hormones such as auxin and cytokinin so that roots and shoots can grow
Gene transfer: splicing the genes of one species into another to get the desired traits
- Cold resistant gene: obtained from a kind of fish
- Bt gene: codes for proteins that paralyze and kill insects
Solutions:
- Crop rotation: rotate the kind of crops grown on a farmland. Different crops will require different nutrients
- Farm manure: spread animal wastes on soil
- Plant manure: crops are planted but not harvested
- Fertilizers: Inorganic minerals that contain the missing nutrients from the soil
Pest Control
- Pesticide: killing the bugs using chemicals
- Sex attractant control: make the male bugs infertile
- Biological control: introduce other species that can kill the pests
- Hydroponic environment: grow the plants such that the roots are underwater