home    about    browse    search    latest    help 
Login | Create Account

Effects of Reduced Tillage on Weed Pressure, Nitrogen Availability and Winter Wheat Yields under Organic Management

Hofmeijer, Merel A.J.; Krauss, Maike; Berner, Alfred; Peigne, Joséphine; Mäder, Paul and Armengot, Laura (2019) Effects of Reduced Tillage on Weed Pressure, Nitrogen Availability and Winter Wheat Yields under Organic Management. Agronomy, 9 (4) (180), pp. 1-11.

[thumbnail of hofmeijer_etal_2019_Agronomy_Vol9_Issue4_article180_p1-11.pdf] PDF - English

Document available online at: https://www.mdpi.com/2073-4395/9/4/180


Reduced tillage reduces soil erosion and increases topsoil organic matter compared with conventional tillage. However, yields are often reported to be lower, presumably, due to increased weed pressure and a slower N mineralization under organic farming conditions. The effects of reduced tillage compared with ploughing on weed infestation and winter wheat performance at four different crop stages, i.e., tillering, stem elongation, flowering, and harvest, was monitored for a single season in an eleven-year-old organic long-term tillage trial. To disentangle the effects of weed presence on crop yield and potential crop performance, subplots were cleaned from weeds during the whole cropping season. Weed biomass was consistently higher under reduced tillage. Soil mineral nitrogen contents under reduced tillage management were higher, which could be explained by the earlier ley termination in autumn compared with the conventional tillage system. Nitrogen status of wheat assessed with SPAD measurements was consequently higher under reduced tillage throughout the season. At harvest, wheat biomass and grain yield were similar in both tillage systems in the presence of weeds, but 15–18% higher in the reduced tillage system when weeds were removed. The negative impact of weeds on yields were not found with conventional tillage with a low weed infestation. Results suggest that reduced tillage can provide equivalent and even higher yields to conventional tillage in organically managed winter wheat if weed management is improved and good nutrient supply is assured.

EPrint Type:Journal paper
Keywords:reduced tillage, weed-crop competition, ploughing, perennials, wheat, Bodenwissenschaften
Agrovoc keywords:
Subjects:"Organics" in general
Crop husbandry > Production systems > Cereals, pulses and oilseeds
Crop husbandry > Soil tillage
Crop husbandry > Weed management
Research affiliation: Switzerland > FiBL - Research Institute of Organic Agriculture Switzerland > Soil
France > ISARA - Institut supérieure d’agriculture Lyon
Netherlands > Wageningen University & Research (WUR)
Deposited By: Krauss, Maike
ID Code:37115
Deposited On:24 Jan 2020 13:53
Last Modified:22 Apr 2022 08:31
Document Language:English
Refereed:Peer-reviewed and accepted

Repository Staff Only: item control page


Downloads per month over past year

View more statistics