The effects of soil physical parameters on corn (Zea mays L. ) emegence were determined in a growth chamber experiment. The treatments included three different soils, four soil temperature regimes (5-15, 10-20, 15-25, and 20-30 degree C), four soil matric potentials ( minus 10, minus 33, minus 100, and minus 500 kPa), and seven aggregate size distributions (geometric mean diameter equals 0. 5, 1. 0, 1. 9, 3. 6, 5. 6, 6. 8, and 11. 1 mm). Corn was planted at 50 mm depth in soil aggregate mixtures contained in aluminum cylinders 152 mm in height by 76 mm inside diameter. Cylinders were placed in a growth chamber with a 10 degree C diurnal fluctuation and time to corn emergence was determined. Based on the growth chamber study, guidelines are developed that define best seedbed conditions for corn emergence. Time to corn emergence was influenced by the independent variables in the following order: soil temperature VM GT TH soil matric potential greater than soil aggregate size distribution. Refs.
|Original language||English (US)|
|Number of pages||8|
|Journal||Soil Science Society of America Journal|
|State||Published - Jan 1 1985|