Effects of harvest date on maize in the humid sub-tropical Mid-South USA. Bruns, H., A. & Abbas, H., K. Maydica, 49(1):1-7, Istituto Sperimentale per la Cerealicoltura, 2004. abstract bibtex Limited capacity for artificially drying maize (Zea mays) grain exists in the mid-south USA. Most of the area's production is field-dried and thus subjected to risks inherent to leaving mature crops in the field. A two-year experiment to assess some of the effects of delayed harvest on maize grain yield and other characteristics was conducted at Stoneville, Mississippi, USA. Six maize hybrids (3 Bt and 3 non-Bt) were grown in 2000 and 2001. Grain was hand-harvested and shelled at 14, 28, 42, 56 and 70 days post-physiological maturity (P-PM). Grain moisture levels declined with increased delays in harvest in both years. Levels safe for handling and storage (150 mg g-1) were acquired at 28 days P-PM in 2000 and 42 days P-PM in 2001. Grain moisture fell below 120 mg g-1 at 28 days P-PM in 2000 making it subject to mechanical damage. Declines in grain bulk density at 70 days P-PM may be explained by such damage. Bt hybrids had less stalk lodging than non-Bt hybrids, and lodging tended to increase as harvests were delayed. Aflatoxin contamination was minimum in 2000 and non-existent in 2001. Fumonisin levels were higher in 2001 than 2000. Adverse effects on yield and grain quality with delayed harvest appeared minimum, inherent risks of crop losses due to weather exist though, and monitoring grain moisture and the weather are recommended.
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title = {Effects of harvest date on maize in the humid sub-tropical Mid-South USA},
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abstract = {Limited capacity for artificially drying maize (Zea mays) grain exists in the mid-south USA. Most of the area's production is field-dried and thus subjected to risks inherent to leaving mature crops in the field. A two-year experiment to assess some of the effects of delayed harvest on maize grain yield and other characteristics was conducted at Stoneville, Mississippi, USA. Six maize hybrids (3 Bt and 3 non-Bt) were grown in 2000 and 2001. Grain was hand-harvested and shelled at 14, 28, 42, 56 and 70 days post-physiological maturity (P-PM). Grain moisture levels declined with increased delays in harvest in both years. Levels safe for handling and storage (150 mg g-1) were acquired at 28 days P-PM in 2000 and 42 days P-PM in 2001. Grain moisture fell below 120 mg g-1 at 28 days P-PM in 2000 making it subject to mechanical damage. Declines in grain bulk density at 70 days P-PM may be explained by such damage. Bt hybrids had less stalk lodging than non-Bt hybrids, and lodging tended to increase as harvests were delayed. Aflatoxin contamination was minimum in 2000 and non-existent in 2001. Fumonisin levels were higher in 2001 than 2000. Adverse effects on yield and grain quality with delayed harvest appeared minimum, inherent risks of crop losses due to weather exist though, and monitoring grain moisture and the weather are recommended.},
bibtype = {article},
author = {Bruns, H A and Abbas, H K},
journal = {Maydica},
number = {1}
}
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