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Full-Text Articles in Agriculture
Soil Quality Assessment After Weed-Control Tillage In A No-Till Wheat–Fallow Cropping System, T. A. Kettler, Drew J. Lyon, John W. Doran, W. L. Powers, Walter W. Stroup
Soil Quality Assessment After Weed-Control Tillage In A No-Till Wheat–Fallow Cropping System, T. A. Kettler, Drew J. Lyon, John W. Doran, W. L. Powers, Walter W. Stroup
Panhandle Research and Extension Center
Adoption of reduced-tillage fallow systems in the western USA is limited by winter annual grass weeds such as downy brome (Bromus tectorum L.). Moldboard plowing is an effective means of controlling downy brome in winter wheat (Tritcum aestivum L.)–fallow systems. The purpose of this study was to assess the influence of plowing and secondary tillage operations, for the purpose of weed control, on soil quality attributes of a silt loam soil that had been cropped in a subtill or no-till (NT) winter wheat–fallow system for more than 20 yr. Compared with undisturbed NT, downy brome populations in plowed …
First Report Of Aphanomyces Root Rot Of Sugar Beet In Nebraska And Wyoming, R. M. Harveson
First Report Of Aphanomyces Root Rot Of Sugar Beet In Nebraska And Wyoming, R. M. Harveson
Panhandle Research and Extension Center
Sugar beet (Beta vulgaris L.) plants exhibiting dull green and chlorotic foliage were first observed in a field near Dalton, NE, in late July 1999. Root symptoms included distal tip rot with internal, yellow-brown, watersoaked tissues. Isolations on MBV medium (1) consistently yielded Aphanomyces cochlioides Drechs. Water cultures produced primary zoospores that encysted at the tips of sporangiophores, followed by release of secondary zoospores within 12 h. Seedlings inoculated with zoospores began to die 2 weeks after emergence in a greenhouse. Symptoms on hypocotyls began as water-soaked lesions that turned black and thread-like. The causal agent was reisolated from …