A field trial to assess the effects of rabbit grazing on spring barley

A field trial was established in 1994 in Prince Edward Island, Canada, to determine the effects of 2- and 3-year crop rotations, with either conventional or minimum tillage treatments, on the severity of potato diseases caused by soil-borne pathogens. The 2-yr rotation consisted of spring barley and potato (cv. Russet Burbank) and the 3-yr rotation was barley (undersown with red clover), red clover and potato. In the potato years only, the main plots were split to examine conventional and minimum tillage (sub-plot) treatments. Potato diseases were assessed during the period 2000–2002, 6–8 yr after the initial establishment of the field trial. In each year of the study, potato plants grown in 3-yr rotations developed significantly (P = 0.05) lower levels of stem and stolon canker and black scurf (Rhizoctonia solani) compared with those from 2-yr rotations. Overall, rotation duration (not tillage type) was the main factor contributing to reduction of disease caused by R. solani. The severity of silver scurf (Helminthosporium solani) was significantly (P = 0.05) lower in tubers from plots managed in 3-yr rotations under minimum tillage practices in 2000, significantly higher in plots managed with minimum tillage in 2001, and unaffected by treatment in 2002. The severity of dry rot (Fusarium spp.) was significantly (P = 0.05) lower in tubers from plots managed with 3-yr rotations under minimum tillage practices in 2000, but was unaffected by either tillage regime in 2001 and 2002. The severity of common scab (Strep tomyces scabiei) was low and not influenced by tillage or rotation in any year of study. In summary, a 3-yr crop rotation combined with minimum tillage reduced potato diseases caused by R. solani and did not affect disease caused by other soil-borne pathogens. From a crop health perspective, there appear to be no constraints to the use of minimum tillage practices in association with 3-yr rotations in potato production in regions of temperate humid agriculture. Key words: Crop rotation, minimum tillage, potato, Solanum tuberosum, soil-borne pathogens, Rhizoctonia solani

Download Full-text

The impact of different soil tillage on weed infestation of spring barley in conditions of dryer climatic areas Czech Republic

Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis ◽

10.11118/actaun200856050235 ◽

2008 ◽

Vol 56 (5) ◽

pp. 235-242 ◽

Cited By ~ 3

Author(s):

Jan Winkler

Keyword(s):

Czech Republic ◽

Correspondence Analysis ◽

Field Trial ◽

Spring Barley ◽

Conventional Tillage ◽

Soil Tillage ◽

Weed Species ◽

Minimum Tillage ◽

Weed Infestation ◽

The Impact

The impact of soil tillage on weeds in spring barley was observed on the field trial. The field trial was established in very warm and dry climatic region (experimental field station in Žabčice, Mendel University of Agriculture and Forestry Brno, Czech Republic). In the experiment there was used 7-strip crop rotation and three variants of soil tillage: conventional tillage (CT), minimum tillage (MT), when soil is shallow loosened and no tillage (NT) what means direct sowing without any soil tillage. The weed infestation was evaluated by counting method before herbicide application. Analysis of variance (ANOVA) and then LSD methods, DCA (Detrended Correspondence Analysis) and CCA (Canonical Correspondence Analysis) were used for evaluation of results. The obtained results showed, that different soil tillage did not statistically influenced weed infestation in spring barley. The number of weed species depended on the depth of soil tillage, the variant of minimum tillage had lower number of weed species. These species were more common on the variant of conventional tillage: Chenopodium album, Silene noctiflora, Sinapis arvensis, Veronica polita. The variant of minimum tillage was more suitable for these species: Cirsium arvense, Convolvulus arvensis, Amaranthus sp., Galium aparine. On the variant of direct sowing there appeared mainly these species: Sonchus oleraceus, Lactuca serriola, Tripleurospermum inodorum.

Download Full-text

Supplemental Material for Reliability of Family Maltreatment Diagnostic Criteria: 41 Site Dissemination Field Trial

Journal of Family Psychology ◽

10.1037/a0017011.supp ◽

2009 ◽

Keyword(s):

Diagnostic Criteria ◽

Field Trial

Download Full-text

Jet Lag In Military Operations: Field Trial Of L-Tryptophan In Reducing Sleep-Loss Effects

PsycEXTRA Dataset ◽

10.1037/e538182006-001 ◽

1986 ◽

Author(s):

Cheryl L. Spinweber ◽

Schuyler C. Webb ◽

Christian Gillin

Keyword(s):

Field Trial ◽

Sleep Loss ◽

Jet Lag ◽

Military Operations

Download Full-text

On-line Tropical Epidemiology -A Case-Study from The Gambia

Methods of Information in Medicine ◽

10.1055/s-0038-1635490 ◽

1987 ◽

Vol 26 (02) ◽

pp. 73-76 ◽

Cited By ~ 3

Author(s):

Kathryn Rowan ◽

P. Byass ◽

R. W. Snow

Keyword(s):

Data Collection ◽

Field Trial ◽

Error Rates ◽

Database Management System ◽

Bed Nets ◽

Completion Rates ◽

On Line ◽

Access To Data ◽

Rapid Processing

SummaryThis paper reports on a computerised approach to the management of an epidemiological field trial, which aimed at determining the effects of insecticide-impregnated bed nets on the incidence of malaria in children. The development of a data system satisfying the requirements of the project and its implementation using a database management system are discussed. The advantages of this method of management in terms of rapid processing of and access to data from the study are described, together with the completion rates and error rates observed in data collection.

Download Full-text