Written in English
|Statement||by William Edgar Albeke.|
|The Physical Object|
|Pagination||54 leaves, bound :|
|Number of Pages||54|
The influence on winter wheat yields of competitive weedy species Public Deposited. (Bromus tectorum) were the two weed species studied. Under high winter rainfall and ryegrass competition yields of wheat were seriously impaired in both the short and tall growing wheat varieties tested. As rates of nitrogen increased yields of wheat did not Author: William Edgar Albeke. The influence on winter wheat yields of competitive weedy species. By. (Bromus tectorum) were the two weed\ud species studied.\ud Under high winter rainfall and ryegrass competition\ud yields of wheat were seriously impaired in both the\ud short and tall growing wheat varieties tested. As rates\ud of nitrogen increased yields of wheat did. The late seeding resulted in stands that are not as competitive with weeds and younger plants that can be more susceptible to herbicide injury. These conditions increase the importance of a good weed management plan. In addition, good weed control in winter wheat can increase success with the following crops. Winter wheat cultivars that are competitive with weeds help control weeds in crop rotations. Ten winter wheat cultivars were evaluated for interference with summer annual grasses in the wheat and the subsequent grain sorghum crop in a winter wheat-ecofallow sorghum-fallow rotation in which there are two mo fallow periods and two crops in 3 yr during to
but are usually not as competitive with wheat as the fall-germinating weeds are. Germination depends on soil temperatures and precipitation. Management of Soft Red Winter Wheat 11 Table 3. Percent crop yield loss associated with common winter annual weeds found in Missouri. Weed species Density per sq. feet Yield loss potential (%) Field. CROP PROTECTION () 5 (3), The influence of weeds on aphid-specific natural enemies in winter wheat W. POWELL, THE LATE G. J. DEAN AND N. WILDING Rothamsted Experimental Station, Harpenden, Herts AL5 2,7Q, UK ABSTRACT. Downy brome significantly reduced winter wheat grain yields of all cultivars by 9 to 21% at Lincoln, while at North Platte yield reduction ranged from 20 to 41% depending upon cultivar. Reducing crop row spacing and delaying time of weed emergence may provide crops a competitive edge over weeds. Field experiments were conducted to evaluate the effects of crop row spacing (11, 15, and cm) and weed emergence time (0, 20, 35, 45, 55, and 60 days after wheat emergence; DAWE) on Galium aparine and Lepidium sativum growth and wheat yield losses.
Winter wheat works well in mixtures with other small grains or with legumes such as hairy vetch. It is an excellent nurse crop for frostseeding red clover or sweetclover, if rainfall is sufficient. In the Corn Belt, the legume is usually sown in winter, before wheat’s vegetative growth resumes. A field experiment was conducted during the winter (rabi) seasons of at Varanasi, enhancing sustainability in wheat production though irrigation regimes and weed management practices in. Competitive ability of winter-wheat cultivars with wild oat (Avena ludoviciana). Fertilisation and weed control effects on yield and weeds in durum wheat grown under rain-fed conditions in a Mediterranean climate. Crop canopy development and structure influence weed suppression. Weed Res. 39 – /jx. Key words: winter wheat, tillage system, nitrogen fertilisation, weed species, weed density, weed dry weight, Galium aparine dry weight Introduction Cereal production based on deep tillage, high fertilizer and herbicide rates are becoming less rational because of economic and ecological problems.