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Double Cropping for Hay and No‐tillage Corn Production as Affected by Sod Species with Rates of Atrazine and Nitrogen 1
Author(s) -
Bennett O. L.,
Mathias E. L.,
Sperow Charles B.
Publication year - 1976
Publication title -
agronomy journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.752
H-Index - 131
eISSN - 1435-0645
pISSN - 0002-1962
DOI - 10.2134/agronj1976.00021962006800020010x
Subject(s) - agronomy , loam , bromus inermis , dactylis glomerata , silage , atrazine , poa pratensis , festuca arundinacea , phleum , biology , tillage , panicum virgatum , mollisol , poaceae , soil water , bioenergy , pesticide , ecology , renewable energy
Studies comparing conventional tillage with no‐tillage practices for corn ( Zea mays L.) planted in one or two sod species have been conducted at several locations. Studies comparing growth of corn, when planted in several sod species at variable rates of N, have not been determined. We conducted field studies to determine the effect of two atrazine rates (1.7 and 3.4 kg/ha) and two N rates (135 and 225 kg/ha) at one location and two atrazine rates (2.2 and 4.5 kg/ha) at a second location on hay, corn grain, and silage yields when corn was sod planted in five grass species. Soils were classified as a Wheeling fine sandy loam, a member of the Ultic Hapludulf fine‐loamy mixed family, and a Wharton silty clay loam, a member of the Aquic Hapludult, clayey, mixed mesic family for the two locations, respectively. Grass species used for sod were smooth brcmegrass ( Bromus inermis Leyss.), orchardgrass ( Dactylis glomerata L.), timothy ( Phleum pratense L.), Kentucky‐31 tall fescue ( Festuca arundinacea ), and Kentucky bluegrass ( Poa pratensis L.). Significant differences in grain, silage, and hay yields were found due to associated grass and rates of atrazine. Highest grain and silage yields were produced in bromegrass sod at both rates of atrazine with the high N rate. Corn yields were reduced at the lower rate of atrazine at Point Pleasant when planted in orchardgrass, tall fescue, anti bromegrass. Yields were generally reduced by using the high rate of atrazine at Morgantown. Corn yields were increased by increasing N rate. Sod planted corn had significantly more yield than conventionally planted corn. Bromegrass, orchardgrass and fescue produced excellent regrowth and hay yields when field was treated with 1.7 kg/ha atrazine after a corn crop. Bromegrass had a stimulating effect on corn growth at both locations. Soil moisture was higher and soil temperature lower in sod‐planted corn than in tilled corn.