Key Points
- A study of eleven maize planters measured the depth of seed and fertiliser placement, as well as the horizontal and vertical distances between them.
- The seed depth was around the target depth of 50 mm but fertiliser was shallower than expected, and in some cases, shallower than the maize seed.
- The horizontal distance between seed and fertiliser was less than expected even though direct measurements of the planter prior to sowing suggested adequate greater distance.
- It is advisable to regularly carry out in-field checks of seed and fertiliser placement, particularly where higher rates of starter fertiliser are used and the possibility of “seedling burn” is greater.