Author: Virender KumarPublisher:
ISBN:
Category :
Languages : en
Pages : 360
Book Description
Effects of Summer Annual Cover Crops on Weed Population Dynamics
Author: Virender KumarDynamics of Weed Populations
Author: Roger CousensPublisher: Cambridge University Press
ISBN: 9780521499699
Category : Gardening
Languages : en
Pages : 352
Book Description
Puts the broad empirical knowledge on weed ecology into a theoretical framework.
Integrative Use of Perennial and Annual Cover Crops for Weed Management in Organic Citrus
Author: Jose Clemente Linares B.Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
In a greenhouse experiment, citrus and bermudagrass appeared to compete for N during summer, while citrus and PP did not compete. Citrus, bermudagrass, and PP competed for water uptake during the spring and summer seasons. In general, perennial and annual CC treatments did not affect soil pH, C, N, and C:N ratio during the initial 3 years of field studies. Nematode populations did not reach high levels. Cover crop treatments in row middles did not affect weed growth dynamics in the tree row. However, planting cowpea in the tree row did decrease bahiagrass and crabgrass populations in tree rows. Planting tall cover crops such as sunnhemp near young citrus trees reduced initial tree growth. Cover crop treatments did not affect citrus leaf N, fruit yield, and quality during initial growth. Additional research is needed to assess long-term effects of cover crops on soil quality and fruit yield.
Ecological Management of Agricultural Weeds
Author: Matt LiebmanPublisher: Cambridge University Press
ISBN: 1139427245
Category : Science
Languages : en
Pages : 546
Book Description
This book presents principles and practices for ecologically based weed management in a wide range of temperate and tropical farming systems. Special attention is given to the evolutionary challenges that weeds pose and the roles that farmers can play in the development of new weed-management strategies.
Cover Crop Management Effects on Weed Communities in a Planting Green System
Author: Teala FicksPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Integrated weed management (IWM) is essential for managing herbicide resistant weeds in no-till cropping systems. The use of cover crops as an integrated weed management tactic provides an opportunity to reduce herbicide selection pressure and increase control of herbicide resistant species. Cover crop management decisions made by growers depend on agronomic tradeoffs and input costs associated with cover cropping tactics. Planting green is a cover crop management tactic where cover crop termination is delayed until cash crop planting. In Pennsylvania, there has been increased interest in planting green. We investigated the effects of cereal rye seeding rates on weed suppression when using planting green tactics at two locations in Pennsylvania and one location in Delaware. Weed population responses were evaluated across four cereal rye seeding rate treatments: 0, 51, 101, 135 kg ha-1. Our results found that the presence of cereal rye improved weed suppression compared to the control treatment. Weed suppression was similar across cereal rye seeding rates 51 -- 135 kg ha-1. An additional field experiment evaluated the effects of cover crop termination timing and reduced herbicide inputs on weed suppression. This study was conducted at Rock Springs, PA across three growing seasons and included two cover crop termination treatments: planting green with reduced herbicide use and standard cover crop termination with standard herbicide use. Our results found that planting green provided similar summer annual weed suppression compared to standard cover crop termination. However, standard cover crop termination improved horseweed control compared to the planting green treatment. A third experiment investigated the effects cover crop surface mulch could have on weed community composition in a greenhouse experiment. Seedling establishment and resource allocation of ten weed and two crop species was evaluated across a seed mass gradient and cereal rye surface mulch levels, including 0, 3,360, 6,720, and 10,080 kg ha-1. Our results demonstrated that seed mass was positively correlated with seedling establishment rates under increasing cereal rye mulch levels. In response to increasing cereal rye surface mulch, resource allocation in broad-leaved species were diverted to aboveground biomass, particularly hypocotyl elongation, but surface mulch levels had no significant effect on monocotyledon species.
Managing Cover Crops Profitably (3rd Ed. )
Author: Andy ClarkPublisher: DIANE Publishing
ISBN: 1437903797
Category : Technology & Engineering
Languages : en
Pages : 248
Book Description
Cover crops slow erosion, improve soil, smother weeds, enhance nutrient and moisture availability, help control many pests and bring a host of other benefits to your farm. At the same time, they can reduce costs, increase profits and even create new sources of income. You¿ll reap dividends on your cover crop investments for years, since their benefits accumulate over the long term. This book will help you find which ones are right for you. Captures farmer and other research results from the past ten years. The authors verified the info. from the 2nd ed., added new results and updated farmer profiles and research data, and added 2 chap. Includes maps and charts, detailed narratives about individual cover crop species, and chap. about aspects of cover cropping.
Winter Cover Crop Impacts on Weed Dynamics in Eastern and Central Nebraska
Author: Elizabeth Ann OysPublisher:
ISBN:
Category : Cover crops
Languages : en
Pages : 0
Book Description
Reducing tillage in cropping systems causes weed management to be dependent on chemical and cultural methods for weed control. Over time, herbicide-resistant weeds have developed due to the continuous selection pressures from herbicides, particularly in the Midwest Corn Belt. Integrated weed management strategies, such as cover crops, can be used to mitigate some of these issues. Cover crops are primarily known for their soil health benefits, but there is evidence that cover crops can suppress weeds. However, less research has been done at the field-scale level to address cover crop impacts on the weed seedbank and aboveground weeds during the growing season. In response, two experiments were designed to investigate above and belowground weeds in eastern and central Nebraska. The soil seedbank was germinated from soil samples and weed density and biomass were measured at two points during the growing season. Our results show that cover crops did not influence the total seedbank density, but increased the density of Amaranthus spp. seeds in the seedbank. Aboveground, reductions in weed density and biomass reductions occurred at two sites. More importantly, larger pigweed seedbank densities in the cover crop treatments were not expressed aboveground, signifying cover crop suppression of the weed seedbank through reduced germination withdrawals. This research provides insight on above and belowground weed dynamics under cover crops and shows that cover crops may be a viable integrated weed management tool for Amaranthus spp. management and mitigating risks of herbicide resistance over time by preventing seedbank withdrawals through germination.
Cover Crops and Weed Dynamics in Organic Reduced Tillage
Author: Sandra Sophia WaymanWeed Control
Author: Nicholas E. KorresPublisher: CRC Press
ISBN: 1498787479
Category : Science
Languages : en
Pages : 664
Book Description
In light of public concerns about sustainable food production, the necessity for human and environmental protection, along with the evolution of herbicide resistant weeds, call for a review of current weed control strategies. Sustainable weed control requires an integrated approach based on knowledge of each crop and the weeds that threaten it. This book will be an invaluable source of information for scholars, growers, consultants, researchers and other stakeholders dealing with either arable, row, cash, vegetables, orchards or even grassland-based production systems. The uniqueness of this book comes from the balanced coverage of herbicide effects on humans and environment in relation to best weed control practices of the most important cropping systems worldwide. Furthermore, it amalgamates and discusses the most appropriate, judicious and suitable weed control strategies for a wide range of crops. It reviews the available information and suggests solutions that are not merely feasible but also optimal.
Author: Samuel F. Turner