Using a stochastic version of the POLYSYS modeling framework, an examination of projected variability in agricultural prices, supply, demand, stocks, and incomes is conducted. Random yield and export shocks are introduced in each of 100 iterations of a ten-year simulation and planted acreage, production, total use, ending stock, stock-to-use, season average price, and net return results are pre...

The European corn borer, Ostrinia nubilalis (Hübner) (Lepidoptera: Crambidae), is a widely distributed and serious economic pest to corn production in the U.S. Genetic variability of O. nubilalis was studied in 18 sub-populations in the upper Midwestern United States using amplified fragment length polymorphism. The relatively low GST values indicate that more variation exists within population...

in order to evaluate the interference effect natural population weeds and plant density, an experiment with randomized complete block design in factorial arrangement with 4 replications was conducted in 2006 in a field experiment at ramin agricultural and natural resources university, khouzestan. treatments included two factor, plant density of corn at three levels (4, 7 and 10 plants m-2) and ...

the aim of this study was investigation the energy flow and global warming potential (gwp) of corn farm in gorgan city. for this purpose, data were collected from three conventional planting methods (spring planting, summer planting in wheat residue and summer planting without wheat residue) by using a face-to-face questionnaire performed with farmers in summer 2012. after the required data in ...

in order to study the effects of different sowing dates by some of companion crops on the weeds control, morphological traits and yield of corn sc 504, a field experiment was carried out of research field at tabriz university during 2010 growing season. treatments were arranged in a factorial experiment using randomized complete blocks design with three replicatins. factors was include four lev...

The objectives of this presentation are to evaluate and compare the environmental burdens of the two different concentrate feed supply systems to Japanese domestic livestock industry. Life-Cycle Assessment (LCA) method is used on the two systems such as the conventional system depending on US-imported corn and the proposed new system. Japanese domestic livestock industry could reduce 78,462 ton...

Nitrogen applied before planting is more vulnerable to lobs to the environment than nitrogen applied during the gro~ving season, but the growing season application can increase the risk o f lower yields c;iused by adverse weather that prohibits farmers to cornplete N application. An expected utility framework is used to illustrate the potential econo~nic benefit of insurance for :I farmer to re...

Large scale planting of Bt crops began in 1996 and grew quickly to more than 10 million ha per year. The cumulative area of Bt crops grown globally from 1996 to 2002 exceeded 62 million ha, enough to cover the states of California and Iowa. More than 99% of this area was planted with either Bt corn or Bt cotton producing Bt toxins Cry1Ab or Cry1Ac to kill larvae of lepidopteran pests. These Bt ...

Two experiments were conducted in north-central Florida to examine the effects of various winter cover crops on plant-parasitic nematode populations through time. In the first experiment, six winter cover crops were rotated with summer corn (Zea mays), arranged in a randomized complete block design. The cover crops evaluated were wheat (Triticum aestivum), rye (Secale cereale), oat (Avena sativ...