What is gap filling ?

Gap filling involves spreading seeds or transplanting seedlings into gaps where early sown seeds have failed to sprout. These are usually done a week after seeding to a maximum of 15 days after sowing. Gap filling comes first in dryland agriculture. After 7 days after seeding, the seeds are dibbled. To avoid drought, thinning is done after gap filling. Mid-season correction is a management method that involves removing a percentage of the plant population to reduce stress.