Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 20 for “"Weed biomass"”.
-
Corncob Grit Application as an Alternative to Control Weeds in Two Crop Production Systems
<p>Weed management is one of the most challenging production problems in organic cropping systems because of limited weed control methods. Grits, derived from agricultural residues, have been demonstrated to control weed seedlings selectively in corn. This research examined weed efficacy and crop …
-
Evaluation of Flame Weeding in Southeastern South Dakota
<p>Weed management is the main yield-limiting factor in production of organic crops. Currently, organic producers have limited resources available for in-row weed management. Flame weeding has been recognized for its potential as one part of an integrated approach at weed management in organic …
-
Efficacy of Hercides for weed control in soyabean(glycine max)under a no-Tillage cultivation system in Zambia
… herbicides. They were compared with hand hoe weeding (14 and 28 days after planting) and no weeding. The seedbed was prepared by two applications of 0.6 kg a.i/ha paraquat before planting and this effectively controlled the first and second flush of weeds respectively. However, Euphorbia …
-
The Effects of Agricultural Waste-Based Compost Amendments in Organic Pest Management
… limited and sustainable management of pathogens, weeds, and arthropods is important for staying profitable and reducing the use of harmful chemicals. Organic soil amendments play an important role in supplying some of the nutritional needs of vegetable crops and improving soil structure, while …
-
Diversity Relationships in Native, Warm-Season Plant Communities used for Agriculture
… mixtures and management methods on productivity, weed biomass, nutritive value, and community composition, and 2) to identify mechanisms that generate any positive diversity-productivity relationships over a three-year establishment period. In 2008, two experiments were established to evaluate the …
-
The implications of improving the conservation value of field margins on crop production
… of field margin management on crop yield and weed biomass in the crop edge (headland) was investigated. Treatment did not have any significant effect on cereal yields, and taking a one metre strip out of crop production to establish a sterile, natural regeneration or sown strip, did not …
-
The Influence of Elevated Carbon Dioxide and Water Availability on Herbaceous Weed Development and Planted Loblolly Pine (Pinus taeda) and Coppice Sweetgum (Liquidambar styraciflua) Growth
… were grown in competition with a native weed community using soil and seed bank collected near Appomattox, Virginia. Seedlings and weeds were exposed to CO₂ (ambient and elevated) and water (water stressed and well watered) treatments for approximately one growing season in closed top …
-
Impacts of Spring-interseeded Cover Crops on Late-emerging Weed Suppression and Ground Cover in Corn (Zea mays L.) Production Systems
… or provides other beneficial features such as weed control or suppression. Corn production that incorporates a cover crop as an alternative weed control strategy and ground cover may support a sustainable system that is less dependent on herbicidal weed control. In addition, the cover crop may …
-
Effects of Sudangrass Cover Crop and Soil Solarization on Weed and Pathogen Management in Organic Strawberry Production
… and soil solarization on important agricultural weeds and pathogens in organic strawberry production in Central California. Lab experiments assessed the time needed to kill weed seeds at temperatures typically achieved during soil solarization (40<strong>°</strong>C, 45<strong>°</strong>C, …
-
Between-row mower design for weed control in organically grown no-till soybeans
Weeds are a major challenge in organic no-till soybean production. They impair crop growth and result in yield loss. Innovative weed control methods need to be developed and experimented with in organic no-till agriculture to reduce weed density and improve organic yield. In 2017, mowing between …
-
The effect of field pea (Pisum sativum L.) basal branching on optimal plant density and crop competitiveness
… at 50 plants m-2 to measure competitiveness with weeds. Plant emergence, number of branches, light interception, harvest index and grain yield were measured. Growth, seasonal temperature and rainfall were near normal in 2005. Severe terminal drought occurred in 2006 which may have lead to …
-
Soil solarization weed control in specialty crops
… for the control of crop diseases, nematodes and weeds. Target soils are tilled, irrigated to field capacity, covered, and sealed with transparent polyethylene (PE) plastic mulch during the hottest part of the year for a period of 4-6 weeks. Applied water in soil micropores is heated by high …
-
A Method for replacing serrated tussock (Nassella trichotoma) with kangaroo grass (Themeda triandra) in lowland native grassland remnants
… method was developed which replaces the noxious weed serrated tussock (Nassella trichotoma (Nees) Arech.) with indigenous kangaroo grass (Themeda triandra Forrsk.) in partly disturbed remnants of western (basalt) plains indigenous grassland, a community listed as vulnerable to extinction. …
-
Double-crop corn (zea mays) weed control in Virginia
… In each experiment, dependent variables included weed control by species evaluated throughout the season, as well as weed biomass and corn yield evaluated at the end of the growing season. Generally, nonselective herbicides were not required in the double-crop system where atrazine was applied as …
-
Soil solarization and soil additives as alternatives to preplant fumigation in annual plasticulture strawberry production
… evaluate the sterilization-mulching effects on weeds, plant health and stand count, yield and fruit parameters (as size and sweetness). A container-grown plant study determined if there was any phytotoxic effect of paper pellets and mustard seed meal on pansies (Viola tricolor). Another study …
-
Agroecological approaches to warm-season cover cropping in northern climate vegetable systems and building collaborations with farmers
… by physically protecting soil, contributing biomass to soil organic matter (SOM), suppressing weed growth, and enhancing nutrient cycling, but their use may be limited in the short growing season of northern climates. Evaluating the effects of cover crops on soil nutrient cycling and SOM in …
-
Legacy effects of cover crop monocultures and mixtures on soil inorganic nitrogen, total phenolic content, and microbial communities on two organic farms in Illinois
… affect the total phenolic content of the soil. Weedy contributions to total plant biomass were also important in determining soil inorganic nitrogen levels, and weed biomass was positively correlated with soil PMN intensity. The second part of this study addressed the changes in microbial …
-
Overseeding Clovers into Permanent Pastures
… sowing and grass, white clover, red clover, and weed biomass were periodically measured during the experiment. Broadcast seeding treatment had 93% more clover seedlings than drill treatment (P = 0.1087) two months after sowing. No difference (P > 0.10) for clover biomass was observed between …
-
Do benefits from cover crops vary by species or mixture composition?
"Cover crops are often used to manage weeds and increase productivity on organic farms, but questions remain about which species or combinations of species have the strongest impacts as living cover and which species and combinations are financially feasible for adoption in organic systems. An …
-
Soil erosion and conservation potential of row crop farming in mountainous landscapes of South Korea
… multiple vegetation parameters of crops and weeds of conventional and organic farms cultivating bean, potato, radish, and cabbage, and we simulated long-term soil loss rates with the Revised Universal Soil Loss Equation (RUSLE). We found that organic farming reduced erosion for radish, as a …