pore water Articles
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Brassica cover crops for Nitrogen retention in the mid-Atlantic coastal plain
Received for publication February 5, 2008. Brassica cover crops are new to the mid-Atlantic region, and limited information is available on their N uptake capabilities for effective N conservation. Forage radish (Raphanus sativus L. cv. Daikon), oilseed radish (Raphanus sativus L. cv. Adagio), and rape (Brassica napus L. cv. Dwarf Essex) were compared with rye (Secale cereale L. cv. Wheeler), a ...
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Life stage sensitivity of the marine mussel Mytilus edulis to ammonia
Ammonia is an important contaminant to consider in all toxicity tests. It is especially important to consider the impacts of ammonia in test methods that use sensitive water column organisms exposed to sediments or sediment extracts, such as pore water and elutriate toxicity tests. Embryo‐larval development toxicity tests, such as the 48‐h method using Mytilus mussel species, are particularly ...
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Soil nitrogen mineralization and microbial biomass relation, and nitrogen conservation in humid-tropics
The reciprocal relationship between microbial biomass C (MB-C) and net nitrification in the seasonally dry tropics can reduce nitrate (NO3–) leaching losses, and be regarded as a mechanism of N conservation. The objective of the present study was to determine the influence of high seasonally prolonged rainfall on water-filled pore space (WFPS), net-nitrification rates (NNR), net-ammonification ...
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Impacts of elemental S applied under various temperature and moisture regimes on pH and available P in acidic, neutral and alkaline soils
We evaluated the effect of elemental S (S0) under three moisture (40, 60, 120% water-filled pore space, WFPS) and three temperature regimes (12, 24, 36°C) on changes in pH and available P (0.5 N NaHCO3-extractable P) concentrations in acidic (pH 4.9), neutral (pH 7.1) and alkaline (pH 10.2) soils. Repacked soil cores were incubated for 0, 14, 28 and 42 days. Application of S0 did not alter the ...
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Effect of N-(n-butyl) Thiophosphoric Triamide and 3,4 Dimethylpyrazole Phosphate on gaseous emissions from grasslands under different soil water contents
The intensification of grassland systems is leading to serious environmental risks due to the large input of nitrogen (N) in fertilizers and the subsequent gaseous losses. Addition of nitrification inhibitors (NI) or urease activity inhibitors to fertilizers could reduce these losses to the atmosphere. In the present study, the effects of the nitrification inhibitor 3,4-dimethylpyrazole phosphate ...
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Nitrous oxide production in an eastern corn belt soil: sources and redox range
Nitrous oxide derived from soils is a main contributor to the greenhouse gas effect and a precursor to ozone-depleting substrates; however, the source processes and interacting controls are not well established. This study was conducted to estimate the magnitude and source (nitrification vs. denitrification) of N2O production as affected by the form of N fertilizer, soil water content, and redox ...
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Assessing the risk to green sturgeon from application of imidacloprid to control burrowing shrimp in Willapa Bay, Washington. I: Exposure characterization
Willapa Bay and Grays Harbor, Washington comprise the largest region of commercial oyster cultivation on the Pacific Coast. The activities of two species of burrowing shrimp impair growth and survival of oysters reared on the intertidal mudflats. In order to maintain viable harvests, the oyster growers have proposed controlling the shrimp by applying the insecticide imidacloprid onto harvested ...
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Assessing the risk to green sturgeon from application of imidacloprid to control burrowing shrimp in Willapa Bay, Washington. II: Controlled exposure studies
The activities of two species of burrowing shrimp have a negative impact on the growth and survivalofoysters reared on intertidal mudflats in Willapa Bay and Grays Harbor, Washington. In order to maintain viable harvests, oyster growers proposed the application of the neonicotinoid insecticide imidacloprid onto harvested beds for the control of burrowing shrimp. In test applications, water ...
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Clock House Farm, Kent - WET Sensor - Case Study
Using the WET Sensor to optimise growing conditions and irrigation efficiency in high volume strawberry and raspberry production Clock House farm nestles in the rolling hills of Kent, a few miles south of Maidstone in the UK. The expansive 250 acre farm grows a variety of fruit, including strawberries, raspberries and blackberries. Notable innovators in horticulture, Clock House Farm were one ...
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Near-saturated hydraulic properties in the surface layer of a sandy loam soil under conventional and reduced tillage
Information on the quantitative tillage effects on pore space and near-saturated hydraulic characteristics is important to improve decision support systems for soil and environmental management. The purpose of this study was to determine the effect of conventional (CT) and reduced tillage (RT) on water retention and infiltration properties of an Agrudalf sandy loam surface soil under long-term ...
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Axle-load impacts on hydraulic properties and corn yield in no-till clay and silt loam
Wheel traffic-induced compaction in no-till (NT) farming can alter soil hydraulic properties and reduce crop yields, but specific information on the impacts of different levels of axle loads on the relationships between soil hydraulic properties and crop yields under long-term NT systems is limited. Thus, this study set out to measure the differences in soil hydraulic properties including ...
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Six effects of organic matter on maintaining soil fertility
The content of soil organic matter is closely related to the level of soil fertility. Although organic matter only accounts for a small part of the total amount of soil, it plays a significant role in maintaining soil fertility. The manufacturer of organic fertilizer production equipment introduces six important functions of organic matter to maintain soil fertility. 1. Provide nutrition for ...
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Formation and emissions of ammonia and greenhouse gases from stored and composted solid animal manure
Beside other branches of industry, agriculture is an important source of methane (CH4) and nitrous oxide (N2O) emissions and the most important source of ammonia (NH3). In spite of several investigations concerning ammonia and greenhouse gas emissions during storage and composting of liquid and solid animal manure, the real extent of these emissions is still unknown. This is mainly because of the ...
By ORBIT e.V.
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The Ultimate Guide to Soil Moisture
Introduction You need to get the right amount of water to crops at the right time. Water and nutrients are used most efficiently when your crops have access to the amount of water the crop needs and the soil can hold. This article describes how to use the data provided by soil moisture probes to more effectively manage your farm. Observing and understanding the consequences of soil moisture ...
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Composting: Art and science of organic waste conversion to a valuable soil resource
Raw organic materials such as grass clippings and manure are transformed into stable soil-like humic compounds through decomposition in the composting process. Composting is an age-old practice found in various settings, ranging from domestic to industrial. Compost maker machine is becoming an increasingly practical method of organic waste disposal when landfills reach capacity ...
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Types Of Soil Sensor-Which Is Best For You
What is soil sensor? Soil sensors are instruments monitor soil moisture conditions. They can be categorized into sensors that monitor moisture, conductivity, temperature, nutrients, pH, and salinity. All these different types of instruments are collectively referred to as soil sensors. With advancements in technology, there are now more advanced soil sensors available that can simultaneously ...
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