Materials and Methods The Neely-Kinyon Long-term Agroecological Research (LTAR) site was established in 1998 to study the long-term effects of organic production in Iowa. Treatments at the LTAR site, replicated four times in a completely randomized design, include the following rotations: conventional corn-soybean (C-S), organic corn-soybean-oats/alfalfa (C-S-O/A), organic corn-soybean-oats/alf...

Glyphosate-resistant corn and soybean are grown in rotations in the Midwest, including Nebraska. Volunteer corn is a problematic weed in soybean fields because it causes harvest problems, reduces yield and seed quality, and potentially harbors insects, pests, and diseases. Several pre-packaged herbicides have been registered in soybean in recent years, but response of volunteer corn to these he...

intercropping may be helpful manner to increase interception and utilization. the aim of this study was to compare radiation use efficiency and radiation interception in intercropping with sole cropping. an experiment was conducted at the agricultural research station, ferdowsi university of mashhad in the growing season of the year 2008. the experimental treatments were: 1- sole crop of bean 2...

Identifying and using native insect resistance genes is the core of integrated pest management. In this study, 10 experimental corn, Zea mays L., hybrids and 10 inbred lines were screened for resistance to major ear-feeding insects in the southeastern Coastal Plain region of the United States during 2004 and 2005. Ear-feeding insect damage was assessed at harvest by visual damage rating for the...

Progress in corn improvement research has produced varieties with higher concentrations of certain nutrients. Normally, corn contains about 3.5% ether extract which is relatively well utilized by pigs. Three varieties of corn with higher oil content and improved fatty acid profile relative to conventional corn were recently developed. The utilization of varieties of corn that contain higher oil...

To investigate the development of resistance to mCry3A, a laboratory colony of the western corn rootworm, Diabrotica virgifera virgifera LeConte, was established from field survivors of mCry3A-expressing (MIR604) corn, Zea mays L. Feral adults emerging from MIR604 (selected) and isoline (control) field plots were collected and returned to the laboratory. Progeny of each colony was reared one ge...

Preconditioned steer calves weighing 690 lbs were fed diets containing on a dry basis 0, 24.9 and 47.0 percent modified wet distillers grains (DGS) for 186 days. Wet DGS replaced a portion of corn and supplement in a diet containing dry rolled corn, corn silage, tub-ground corn stalks and supplement. Steers were implanted initially with Component E-S and terminally with Component TE-S. Daily ga...

introduction intercropping as a common method in sustainable agricultural systems, plays an important role in increasing productivity and yield stability to improve utilization of resources )alizadeh et al., 2010). studies in different countries showed that intercropping causes increase in diversity, production and more efficient use of water resources, land, labor and nutrients and also reduce...