To improve the stubble avoidance rate of no-till wheat seeders under environment corn stubble, side-shift system was developed in present study based on deviation-perception fusion technology. Firstly, amount implement deviation compensation accurately obtained by information sensing system. Then, a fuzzy PID algorithm proposed to optimize performance control Finally, simulation model Matlab/Si...

The European corn borer, Ostrinia nubilalis (Hübner), is a serious pest of commercial maize throughout the U.S. Corn Belt. Adults in the central and eastern Corn Belt aggregate in grassy areas around and within the cornfield where they spend the daylight hours resting and where mating activity occurs at night. Mated females leave the aggregation sites at night to oviposit in cornfields, thus us...

During the spring and summer of 1986, I studied the distribution and breeding biology of five rare birds in the Oklahoma Panhandle: Ferruginous Hawk (Hrrtcv regalis), Golden Engle (Aquiln cht-pctos), Prairie Falcon (Fnlco incsicn~rzrs), Mountain Plover (Clmradrirrs nzontnirrrs) and Long-billed Curlew (N~rinriiirrs ainrricn~iris). Longbilled Curlewsare regular migrants through the western half o...

BACKGROUND AND AIMS The regrowth dynamics after defoliation of the invasive grass Calamagrostis epigejos were studied. As nitrogen (N) reserves have been shown to play an important role during plant regrowth, the identity, location and relative importance for regrowth of N stores were determined in this rhizomatous grass. METHODS Plant growth, nitrate uptake and root respiration were followed...

The principal spring staging areas of the midcontinent population of sandhill cranes (Grus canadensis) are along the Platte and North Platte rivers in south-central Nebraska. Most of these lands are privately owned and managed for corn and cattle production. Diurnal habitat use by radio-tagged cranes was primarily in cropland (55%), native grassland (28%), and tame hayland (15%). Ninety-nine pe...

The reduction in the manure application rates through enrichment with mineral fertilizer has potential to reduce costs, decrease environmental pollution, and extend benefits greater acreage. A pot experiment was carried out assess ammonia emissions from dairy amended fertilizers applied on wheat stubble. treatments were: control (no fertilization), urea (U), calcium ammonium nitrate (AN), (MAN)...

Abstract Cereal production in Australia is severely impacted by diseases such as Fusarium crown rot (caused predominantly pseudograminearum ) and common root Bipolaris sorokiniana ). These are particularly difficult to manage because inoculum can survive at least three years within cereal stubble, or four soil the case of B. . Microwave radiation may be able reduce eliminate stubble soil. Sever...

Fall is burning season in the wheat fields of eastern Washington State. To prepare for planting in 1998, farmers burned about 229,000 acres of wheat stubble, an increase over recent years. Although a tighter state permitting system substantially reduced the acreage burned in 1999, dean air activitists are concerned that the state has not tightened up enough. The fires are used to help control c...