Types of Non-Uniform Plant Spacing
- Misplaced plants due to worn planter parts
- Missing plants (skips)
- Extra plants (doubles)
- May decrease yield relative to a uniform stand
- Will decrease yield relative to a uniform stand
- Yield of adjacent plants will increase, but not enough to compensate for the missing plant
- May increase yield slightly if stand is below optimum
- Yield of doubled plants as well as adjacent plants will decrease, but the yield of the extra plant will compensate for this reduction
Grain yield of individual plants by position relative to skips and doubles (30,000 plants/acre)
Nafzinger, E.D. 1996. Effects of missing and two-plant hills on corn grain yield. Journal of Production Agriculture 9:238-240.
Pioneer studies show that individual plant yield reaches a maximum level when plants are within 2-3 inches of perfect equidistant spacing.