"control crosses can be performed in pea plant or some other organisms ,are not possible in case of human beings,study of family history about inheritance of particular trait is alternative"
pls explain this statement.
what is mean by control cross??
why is this impossible in humans???
Answers
Explanation:
Traditional methods of irrigation are the oldest method used in the earlier years., which are more affordable, efficient than the modern methods. Some of these methods of irrigation are still followed today.
The traditional methods of irrigation include the following:
Check Basin Method
Furrow Irrigation Method
Strip Irrigation Method
Basin Irrigation Method
Check Basin Method
It is one of the best methods of irrigation for levelled fields. The field is divided into basins according to the water capacity. A small drain connects the basin. The basin size is as per the water inflow. The topmost place in the field is the main source of water. This method does not require any technique. Also, it is rather inexpensive. It prevents soil erosion as the rainwater stays in the basin. A large area can be efficiently irrigated by this method.
Furrow Irrigation
Furrow irrigation is very prominent in crops planted in rows. ‘Dol’ (meaning: to sprout) is formed along the sides of the rows and the water flows between two ‘Dols’. If the furrow is filled, there is no need to provide water again. It is comparatively cheap but is labour-intensive. Food crops planted in large areas get a huge amount of water by this method.