Crop yield = a measure of the yield of cereal per unit area of land under cultivation,
- the seed generation of the plant itself
Involve the process of phloem translocation which is a process in plants responsible for transporting the photosynthate materials to all parts of a vascular plant.
The movement of materials(photoassimilate) from leaves to other part of tissues throughout the plant. Carbohydrates produced by plants in their leaves by photosynthesis - Non photosynthetic part of plant also require carbohydrate, organic and non-organic materials. Nutrients translocated : SOURCE (areas of supply/region of excess carbohydrate-mature leaves) TO SINK (areas of metabolism/region where carbohydrate is needed-roots, tubers, developing fruits, immature leaves.) How is translocation affected by drought? - Insufficient amount of water will affect the movement of solute from source to sink)
Materials translocated ?
Nitrogen in the form of amino acids
*photoassimilate is one of a number of biological compounds formed by assimilation using light-dependent reaction . TRANSLOCATION
Earliest method. Choosing individual plants that exhibit the best traits and saving their seeds to sow the following year.
Process of combining different varieties or species of organisms to create a hybrid . The pollen grains from a plant with desired characters are transferred to the stigmas of female flowers of other plant
Process of genome doubling that gives rise to organisms with multiple sets of chromosomes. Polyploids generally grow larger than normal plants.
Used to provide raw water (water taken from environment) feed to water treatment plants. 5 thousand year ago, the crater of extinct volcanoes in Arabia used as reservoir by farmer for their irrigation water. Dry climate and water scarcity in India led to early development of water management techniques, include the building of reservoir that ensure the continuity of water supply for crops.