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Combine Effects On Commingling And Residual Grain, H. Mark Hanna, Darren H. Jarboe, Graeme R. Quick Feb 2007

Combine Effects On Commingling And Residual Grain, H. Mark Hanna, Darren H. Jarboe, Graeme R. Quick

Agricultural and Biosystems Engineering Conference Proceedings and Presentations

Emerging identity-preserved grain markets depend on avoidance of commingling grain at harvest. Knowledge of where grain resides in a combine, cleaning labor requirements, and resulting purity levels would assist producers. Measurements were made of grain and other material residing in different areas of rotary- and cylinder-type combines in replicated clean-outs during corn and soybean harvest and also in preliminary clean-outs during oat harvest. Concentration of the prior (i.e. commingled) grain was measured in the first grain harvested of the subsequent crop.

Total material remaining in the combine ranged from 84 to 186 lb, 61% of which was whole grain ...


Nozzle And Carrier Application Effects On Control Of Soybean Leaf Spot Diseases, H. Mark Hanna, Alison E. Robertson, W. Mark Carlton, Robert E. Wolf Jan 2007

Nozzle And Carrier Application Effects On Control Of Soybean Leaf Spot Diseases, H. Mark Hanna, Alison E. Robertson, W. Mark Carlton, Robert E. Wolf

Agricultural and Biosystems Engineering Conference Proceedings and Presentations

A two-site, two-year field application experiment investigated fungicide coverage in a fully-developed soybean canopy. Application treatments included “high-rate” (187 l/ha; 20 gal/acre) and “low-rate” (112 l/ha;12 gal/acre) with fine-droplet two-orifice tips, medium-droplet two-orifice tip at 187 l/ha (20 gal/acre), a coarse-droplet single-orifice “herbicide-style” tip at 168 l/ha (18 gal/ac), and an air-assisted spray treatment. Droplet coverage and size, and foliar disease severity in the lower, middle, and top parts of the plant canopy, and crop yield were measured.

Droplet size generally followed expected manufacturer specifications. Percentage area covered and drops/cm ...


Insect-Mediated Cross-Pollination In Soybean [Glycine Max (L.) Merrill] : I. Agronomic Performance, E. Ortiz-Perez, S. R. Cianzio, H. Wiley, Harry T. Horner, W. H. Davis, R. G. Palmer Jan 2007

Insect-Mediated Cross-Pollination In Soybean [Glycine Max (L.) Merrill] : I. Agronomic Performance, E. Ortiz-Perez, S. R. Cianzio, H. Wiley, Harry T. Horner, W. H. Davis, R. G. Palmer

Genetics, Development and Cell Biology Publications

In soybean, manual cross-pollination to produce large quantities of F1 hybrid seed for yield trials is difficult and time-consuming. Conversely, insect-mediated cross-pollination has been shown to produce large quantities of hybrid seed in soybean and could facilitate the identification of heterotic patterns. The objective of our study was: (1) evaluate F1hybrid soybean plants from single crosses for yield and agronomic traits over several environments and (2) compare hybrid performance of the single crosses to lines developed from three-way crosses and backcrosses. In 2003, F1 seed of single-crosses and their parent lines were evaluated in replicated experiments ...