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Dryland pea production and water use in responses to tillage , crop rotation, and weed management practice. Pea has been used to replace fallow and sustain dryland crop yields in arid and semiarid regions, but information to optimize its management is required.
We evaluated pea growth, yield, and water use in response to tillage , crop rotation, and weed management practice from to in the norther Potato Response to Tillage and Nitrogen Management. Potato responses to different rates of pre-plant and in-season N management are evaluated under reduced and conventional tillage under center pivot irrigation.
Tuber yield, tuber size distribution, and tuber specific gravity were largely similar across different tillage and N management practices. Ammonia volatilization from surface-applied poultry litter under conservation tillage management practices. Land application of poultry litter can provide essential plant nutrients for crop production, but ammonia NH 3 volatilization from the litter can be detrimental to the environment.
A multiseason study was conducted to quantify NH 3 volatilization rates from surface-applied poultry litter under no-till and paraplowed conservation tillage managements. Litter was applied to supply 90 to kg N ha Evaluation of NH 3 volatilization was determined using gas concentrations and the flux-gradient gas transport technique using the momentum balance transport coefficient. Ammonia fluxes ranged from 3. Ammonia volatilization was rapid immediately after litter application and stopped within 7 to 8 d.
Precipitation of 17 mm essentially halted volatilization, probably by transporting litter N into the soil matrix. Application of poultry to conservation-tilled cropland immediately before rainfall events would reduce N losses to the atmosphere but could also increase NO 3 leaching and runoff to streams and rivers.
Conservation tillage and the weed diversity are two hot issues in the modern ecological agriculture. Although it is known that the diversity of weed would increase slightly in the farmland under conservation tillage , the interaction effects between the tillage and the nutrient management on the weed community are not clear. In this study, one wheat-maize rotation field located in Ji'nan, Shandong Province, was selected as the studying site.
Different tillage methods no- tillage , deep subsoiling, rotary tillage , deep tillage and different nutrient managements farmers routine, kg N hm -2 per year; high production and efficiency, kg N hm -2 per year; optimal management , kg N hm -2 per year were carried out for 3 years. The characteristics of the spring weed communities under different managements were investigated and compared.
The showed that there were 15 species in the spring weed communities in the test filed and Digitaria sanguinalis and Echinochloa crusgalli were the dominant species. The plots under no- tillage or deep subsoiling had higher weed densities compared with those under the deep tillage or rotary tillage. In terms of the effect of tillage on the weed community diversity, both species richness index and species evenness index were lowest but the community dominance index was highest in the plots under deep tillage. In terms of the effect of the nutrient management , with the increase of fertilizer application, both species richness and evenness index increased under the different tillage methods.
The community dominance increased with the increasing fertilizer application under deep tillage or rotary tillage and vice versa under no- tillage , deep subsoiling. In terms of weed biomass, the plots under no- tillage or deep subsoiling had ificantly higher weed biomass than those under the other two tillage methods.
The plots under routine nutrient management had higher weed biomass than those under the other two nutrient managements. Quantification and fragment analysis of soil and cotton root-associated fungal and bacterial populations under different tillage managements. Background: Conservation tillage is a common management practice utilized in the hopes of reducing soil erosion and increasing soil carbon.
Evidence suggests that conservation tillage may lead to habitat improvement for soil microorganisms, in particular rhizospheric bacteria and arbuscular mycorrhi Variability in carbon dioxide fluxes among six winter wheat paddocks managed under different tillage and grazing practices. Wagle, Pradeep; Gowda, Prasanna H. Carbon dioxide CO2 fluxes from six winter wheat Triticum aestivum L.
Large variations in CO2 fluxes were observed among paddocks. Seasonal sums of NEE ranged from to g C m Long-term measurements from our clustered and paired eddy covariance towers will provide insights into the effects of tillage and different grazing practices on CO2 dynamics in winter wheat. Evaluating agricultural management effects on alachlor availability: Tillage , green manure, and biochar.
Agricultural and soil management practices have been reported to affect alachlor sorption-desorption and degradation rates. The objectives of this study were to: a assess differences in alachlor sorption due to tillage treatments chisel plow and ridge tillage on soils from three Midwestern U. Long-term no- tillage and organic input management enhanced the diversity and stability of soil microbial community. Intensive tillage and high inputs of chemicals are frequently used in conventional agriculture management , which critically depresses soil properties and causes soil erosion and nonpoint source pollution.
Conservation practices , such as no- tillage and organic farming, have potential to enhance soil health. However, the long-term impact of no- tillage and organic practices on soil microbial diversity and community structure has not been fully understood, particularly in humid, warm climate regions such as the southeast USA. We hypothesized that organic inputs will lead to greater microbial diversity and a more stable microbial community, and that the combination of no- tillage and organic inputs will maximize soil microbial diversity.
We conducted a long-term experiment in the southern Appalachian mountains of North Carolina, USA to test these hypotheses. The showed that soil microbial diversity and community structure diverged under different management regimes after long term continuous treatments. Organic input dominated the effect of management practices on soil microbial properties, although no- tillage practice also exerted ificant impacts. Both no- tillage and organic inputs ificantly promoted soil microbial diversity and community stability.
The combination of no- tillage and organic management increased soil microbial diversity over the conventional tillage and led to a microbial community structure more similar to the one in an adjacent grassland. These indicate that effective management through reducing tillage and increasing organic C inputs can enhance soil microbial diversity and community stability. All rights reserved. Agricultural management options for climate variability and change: conservation tillage. Adapting to climate variability and change can be achieved through a broad range of management alternatives and technological advances.
This publication is focused on the use of conservation tillage in crop production systems. The publication outlines ways that conservation tillage can reduce risk r Physical and hydraulic properties of a sandy loam soil under zero, shallow and deep tillage practices.
Over the centuries, tillage has been an important agronomic practice that has been used to mechanically alter soil properties and enhance the soil ecosystem for growth of crops. A 4-yr study investigated the impact of no- tillage NT , shallow tillage at a cm depth ST , and deep tillage at a c Simulated responses of soil organic carbon stock to tillage management scenarios in the Northwest Great Plains.
Background: Tillage practices greatly affect carbon C stocks in agricultural soils. Quantification of the impacts of tillage on C stocks at a regional scale has been challenging because of the spatial heterogeneity of soil, climate, and management conditions. The reduction in the rate of C emissions with conversion of CT to NT at the ecoregion scale is much smaller than those reported at plot scale and simulated for other regions.
Conclusion: For assessing the potential of agricultural soils to mitigate C emissions with conservation tillage practices , it is critical to consider both the crop rotations being used at a local scale and the composition of all cropping systems at a regional scale. Dust-associated microbiomes from dryland wheat fields differ with tillage practice and biosolids application. Schlatter, Daniel C. Wind erosion is a ificant threat to the productivity and sustainability of agricultural soils. In the dryland winter wheat Triticum aestivum L. In addition, some farmers in this dry region apply municipal biosolids to soils as fertilizer and a source of stable organic matter.
The impacts of soil management practices on emissions of dust microbiota to the atmosphere are understudied. We used high-throughput DNA sequencing to examine the impacts of conservation tillage and biosolids amendments on the transport of dust-associated fungal and bacterial communities during simulated high-wind events over two years at Lind, WA. The fungal and bacterial communities contained in windblown dust differed ificantly with tillage conservation vs.
However, the richness and diversity of fungal and bacterial communities of dust did not vary ificantly with tillage or fertilizer treatments. Taxa enriched in dust from fields under conservation tillage represented many plant-associated taxa that likely grow on residue left on the soil surface, whereas taxa that were more abundant with conventional tillage were those that likely grow on buried plant residue.
Dust from biosolids-amended fields harbored greater abundances of taxa that likely feed on introduced carbon. Most human-associated taxa that may pose a health risk were not present in dust after biosolids amendment, although members of Clostridiaceae were enriched with this treatment. show that tillage and fertilizer management practices impact the composition of bioaerosols emitted during high-wind events and have potential implications for plant and human health. Statistical learning algorithms for identifying contrasting tillage practices with landsat thematic mapper data.
Tillage management practices have direct impact on water holding capacity, evaporation, carbon sequestration, and water quality. Integrated palmer amaranth management in glufosinate-resistant cotton: II. A three-year field experiment was conducted to evaluate the role of inversion tillage , cover crops and spring tillage methods for Palmer amaranth between-row BR and within-row WR management in glufosinate-resistant cotton. Main plots were two inversion tillage systems: fall inversion tillage IT Stellite-based classification of tillage practices in the U.
The of applications based on Machine learning algorithms applied to satellite images has been increasing steadily in last few years. While in the context of agricultural monitoring these techiques are most commonly used for land cover type and crop classification, they also show a great potential for monitoring management practices.
In this study, we present some preliminary on classifying tillage practices in the U. Describes a computer program, Residue Management , which is deed to supplement discussions on the Universal Soil Loss Equation and the impact of tillage on soil properties for introductory soil courses. The program advances the user through three stages of residue management. Information on obtaining the program is also included. Tillage as a tool to manage crop residue: impact on sugar beet production.
Crop residues and plant cover represent a pool of organic matter that can be used either to restore organic matter in soils, and therefore maintain soil fertility, or that can be valorized outside of the field e. However, it is crucial that the exportation of residues is not done to the detriment of the system sustainability.
Three long term experiments have been settled in the loamy region in Belgium. All of them are deed to study the effect of residues management by several tillage systems conventional plowing versus reduced tillage on the whole soil-water-plant system. In this field, four contrasted crop residues managements are tested in order to contrast as much as possible the responses from the soil-water plant system.
Two practices characterize the four modalities: soil tillage ploughing at 25 cm depth or reduce tillage at 10 cm max and residue management exportation or restitution. In those fields cover crop management is also diverse: destruction of the cover crop by winter ploughing, spring ploughing, strip tillage with a chemical destruction if needed or shallow tillage with a decompaction before cover crop sowing.Women looking to suck in Limingzhuang
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