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Effects of plant population, row spacing, and relative maturity on dryland corn in the northern plains. I. Corn forage and grain yield
- Narrow rows or equidistant planting of corn (Zea mays L.) has been beneficial in the Corn Belt. The concepts were evaluated at Mandan, N. D., to determine their influence under dryland conditions and in combinations with early-maturing varieties which partially evade late season drought. The 68 and 85-day relative maturity hybrids were grown at plant populations of 20,000; 30,000; 40,000; 60,000 and 74,000 plants/ha in 50 and 100-cm spaced rows for 3 years. In 1968, a "wet" year, row spacing and maturity class significantly affected dry matter production, but only population influenced grain yield. Plant population and maturity class significantly affected grain yield in 1969 and 1970, but only population influenced dry matter in 1969. Interactions were not significant. Later-maturing corn averaged 12% greater forage yield, but early-maturing corn produced 19% more grain. Average grain yields increased from 2,600 to 3,070; 3,090; 2,960; and 2,680 kg/ha with progressive increases in population. Grain yield for 50 and 100-cm rows averaged 2,890 and 2,870 kg/ha, respectively. Number of barren stalks increased and ear weight decreased with increased population. Optimum plant population for grain and forage ranged from 30,000 to 40,000 plants/ha.
Alessi, J. , Power, J.F.
Zea mays , hybrids , high-yielding varieties , row spacing , planting , plant cultural practices , semiarid zones , grain crops , forage crops , crop yield , harvest index , grain yield , dryland farming , drought , early development , dry matter accumulation , relative humidity , North Dakota , Corn Belt region
- Includes references.
- Agronomy journal Mar/Apr 1974, 66 (2)
Journal Articles, USDA Authors, Peer-Reviewed
- Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.