Journal ArticleDOI
The Mechanism for Weed Suppression by a Forage Radish Cover Crop
TLDR
The results of the four experiments point to a common conclusion that fall weed competition is the dominant mechanism for early spring weed suppression following forage radish winter cover crops.Abstract:
Little is known about the mechanism of winter annual weed suppression by forage radish (Raphanus sativus L. variety longipinnatus) winter cover crops. Previous studies suggest that allelopathy from decomposing residue and competition due to rapid canopy development contribute to weed suppression by other Brassica cover crops. Four contrasting experimental approaches were used to identify the mechanism of weed suppression by forage radish cover crops. Results of a field based cover crop residue-transfer experiment supported the hypothesis that fall cover crop weed competition is the dominant mechanism of weed suppression following forage radish cover crops. A high level of early spring weed suppression was observed where forage radish grew in the fall regardless of whether residues were left in place or removed. In contrast, there was limited weed suppression in bare soil treatments that received additions of forage radish tissues. Bioassays using cover crop amended soil or aqueous extracts of cover crop tissues and amended soil did not reveal any allelopathic activity limiting seed germination or seedling establishment. In a field-based weed seed bioassay, forage radish cover crops did not inhibit emergence of winter-planted weed seeds relative to a no cover crop control. Forage radish amended soils stimulated seedling growth of lettuce (Lactuca sativa L.) in all types of bioassays. The results of the four experiments in this study point to a common conclusion that fall weed competition is the dominant mechanism for early spring weed suppression following forage radish winter cover crops.read more
Citations
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Journal ArticleDOI
A Definitive Book on Seed Ecology@@@Seeds: Ecology, Biogeography, and Evolution of Dormancy and Germination
TL;DR: A Geographical Perspective on Germination Ecology: Tropical and Subtropical Zones and Biogeographical and Evolutionary Aspects of Seed Dormancy.
Journal ArticleDOI
Quantitative synthesis on the ecosystem services of cover crops
TL;DR: In this paper, the authors quantitatively synthesized different ecosystem services provided by cover crops (e.g., erosion control, water quality regulation, soil moisture retention, accumulation of soil organic matter and microbial biomass, greenhouse gas (GHG) emission, weed and pest control, as well as yield of the subsequent cash crop) using data from previous publications.
Journal ArticleDOI
Weed Suppression in Cover Crop Monocultures and Mixtures
Barbara Baraibar,Mitchell C. Hunter,Meagan E. Schipanski,Abbe V. Hamilton,David A. Mortensen +4 more
TL;DR: The results suggest that cover crop mixtures require only low seeding rates of aggressive grass species to provide weed suppression, which creates an opportunity for other species to deliver additional ecosystem services, though careful species selection may be required to maintain mixture diversity and avoid dominance of winter-hardy cover crop grasses in the spring.
Quantitative synthesis on the ecosystem services of cover crops
TL;DR: In this article, the authors quantitatively synthesized different ecosystem services provided by cover crops (e.g., erosion control, water quality regulation, soil moisture retention, accumulation of soil organic matter and microbial biomass, greenhouse gas (GHG) emission, weed and pest control, as well as yield of the subsequent cash crop) using data from previous publications.
Journal ArticleDOI
Cover Crops for Weed Management in Southern Reduced-Tillage Vegetable Cropping Systems
TL;DR: Investigation is necessary to identify appropriate cover crop and tillage systems for use in other agricultural settings, such as vegetable crops and organic production systems, and resultados promisorios in varios sistemas.
References
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Seeds. Ecology, Biogeography, and, Evolution of Dormancy and Germination 2nd ed
Carol C. Baskin,Jerry M. Baskin +1 more
Book
Seeds: Ecology, Biogeography, and, Evolution of Dormancy and Germination
Carol C. Baskin,Jerry M. Baskin +1 more
TL;DR: A Geographical Perspective on Germination Ecology: Tropical and Sub-tropical Zones as discussed by the authors, Temperate and Arctic Zones, and Semi-Arctic Zones: Temperate, Subtropical, and Arctic zones.
Journal ArticleDOI
Rapid colorimetric determination of nitrate in plant tissue by nitration of salicylic acid
TL;DR: In this article, an analysis for the rapid determination of nitrate-N in plant extracts is described. And the complex formed by nitration of salicylic acid under highly acidic conditions absorbs maximally at 410 nm in basic (pH>12) solutions.
Journal ArticleDOI
Tolerance of vegetable crops to salinity
TL;DR: The salt tolerance of vegetables has been condensed and reported in a uniform format based on the best available data and how different measurements of salinity in solution cultures, sand cultures, and field studies can be reconciled to a common basis.
Journal ArticleDOI
Photomorphogenesis in plants
TL;DR: The 28 chapters written by leading experts from Europe, Israel, Japan and the USA, provide an advanced treatise on the excitingand rapidly developing field of plant photomorphogenesis.