Size and composition of weed seedbank in long-term organic and conventional low-input cropping systems

2012 ◽  
Vol 39 ◽  
pp. 52-61 ◽  
Author(s):  
Federica Graziani ◽  
Andrea Onofri ◽  
Euro Pannacci ◽  
Francesco Tei ◽  
Marcello Guiducci
Keyword(s):  
Agronomie ◽  
2003 ◽  
Vol 23 (7) ◽  
pp. 673-681 ◽  
Author(s):  
C. Clermont-Dauphin ◽  
J. M. Meynard ◽  
Y. M. Cabidoche
Keyword(s):  

2003 ◽  
Vol 67 (2) ◽  
pp. 637 ◽  
Author(s):  
Achmad Rachman ◽  
S. H. Anderson ◽  
C. J. Gantzer ◽  
A. L. Thompson

1993 ◽  
Vol 28 (3-5) ◽  
pp. 691-700 ◽  
Author(s):  
J. P. Craig ◽  
R. R. Weil

In December, 1987, the states in the Chesapeake Bay region, along with the federal government, signed an agreement which called for a 40% reduction in nitrogen and phosphorus loadings to the Bay by the year 2000. To accomplish this goal, major reductions in nutrient loadings associated with agricultural management practices were deemed necessary. The objective of this study was to determine if reducing fertilizer inputs to the NT system would result in a reduction in nitrogen contamination of groundwater. In this study, groundwater, soil, and percolate samples were collected from two cropping systems. The first system was a conventional no-till (NT) grain production system with a two-year rotation of corn/winter wheat/double crop soybean. The second system, denoted low-input sustainable agriculture (LISA), produced the same crops using a winter legume and relay-cropped soybeans into standing wheat to reduce nitrogen and herbicide inputs. Nitrate-nitrogen concentrations in groundwater were significantly lower under the LISA system. Over 80% of the NT groundwater samples had NO3-N concentrations greater than 10 mgl-1, compared to only 4% for the LISA cropping system. Significantly lower soil mineral N to a depth of 180 cm was also observed. The NT soil had nearly twice as much mineral N present in the 90-180 cm portion than the LISA cropping system.


Agriculture ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 445
Author(s):  
Jessica Cuartero ◽  
Onurcan Özbolat ◽  
Virginia Sánchez-Navarro ◽  
Marcos Egea-Cortines ◽  
Raúl Zornoza ◽  
...  

Long-term organic farming aims to reduce synthetic fertilizer and pesticide use in order to sustainably produce and improve soil quality. To do this, there is a need for more information about the soil microbial community, which plays a key role in a sustainable agriculture. In this paper, we assessed the long-term effects of two organic and one conventional cropping systems on the soil microbial community structure using high-throughput sequencing analysis, as well as the link between these communities and the changes in the soil properties and crop yield. The results showed that the crop yield was similar among the three cropping systems. The microbial community changed according to cropping system. Organic cultivation with manure compost and compost tea (Org_C) showed a change in the bacterial community associated with an improved soil carbon and nutrient content. A linear discriminant analysis effect size showed different bacteria and fungi as key microorganisms for each of the three different cropping systems, for conventional systems (Conv), different microorganisms such as Nesterenkonia, Galbibacter, Gramella, Limnobacter, Pseudoalteromonas, Pantoe, and Sporobolomyces were associated with pesticides, while for Org_C and organic cultivation with manure (Org_M), other types of microorganisms were associated with organic amendments with different functions, which, in some cases, reduce soil borne pathogens. However, further investigations such as functional approaches or network analyses are need to better understand the mechanisms behind this behavior.


2003 ◽  
Vol 67 (2) ◽  
pp. 637-644 ◽  
Author(s):  
Achmad Rachman ◽  
S. H. Anderson ◽  
C. J. Gantzer ◽  
A. L. Thompson

2021 ◽  
Vol 41 (5) ◽  
Author(s):  
Catherine Bonnet ◽  
Noémie Gaudio ◽  
Lionel Alletto ◽  
Didier Raffaillac ◽  
Jacques-Eric Bergez ◽  
...  

2007 ◽  
Vol 99 (5) ◽  
pp. 1297-1305 ◽  
Author(s):  
John R. Teasdale ◽  
Charles B. Coffman ◽  
Ruth W. Mangum

2013 ◽  
Vol 147 ◽  
pp. 68-78 ◽  
Author(s):  
T. Ndabamenye ◽  
P.J.A. Van Asten ◽  
G. Blomme ◽  
B. Vanlauwe ◽  
B. Uzayisenga ◽  
...  

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