Quackgrass control with glyphosate and SC-0224 in corn and soybean

1995 ◽  
Vol 75 (1) ◽  
pp. 293-299 ◽  
Author(s):  
Allan S. Hamill ◽  
Jianhua Zhang
Keyword(s):  
Key Words ◽  
Ammonium Sulphate ◽  
Effective Rate ◽  
High Rate ◽  
Repeated Application ◽  
Economic Return ◽  
Soybean Field ◽  
Soybean Yield ◽  
Initial Control ◽  
Low Rate

Studies on quackgrass control were conducted using a factorial combination of glyphosate or SC-0224, each at 0.28, 0.56 and 0.84 kg ha−1, and ammonium sulphate at 0 and 2.5 kg ha−1 in corn and soybean plots on a severe infestation in southwestern Ontario during 5 yr. The two herbicides at a given rate provided similar degrees of quackgrass control. With the addition of ammonium sulphate, the effective rate of both herbicides was reduced from the recommended rate of 0.9 kg ha−1 to 0.56 kg ha−1, which results in a higher economic return. Although a lower rate, 0.28 kg ha−1, also provided satisfactory initial control of quackgrass, there was a tendency to increasing quackgrass coverage with time despite the repeated application of herbicides over years. After 5 yr of treatment at a consistently low rate (0.28 kg ha−1), quackgrass coverage approached the original level in the soybean field. The increase in quackgrass coverage caused a corresponding reduction in soybean yield. The results suggest that glyphosate or SC-0224 at about 0.56 kg ha−1 is effective when applied in conjunction with ammonium sulphate. Lower rates may be acceptable if used with a high rate at properly chosen intervals. Key words: Quackgrass control, glyphosate, SC-0224, ammonium sulphate, soybean, corn

A Note on Groove Depth Changes Without Wear

1980 ◽  
Vol 8 (1) ◽  
pp. 10-12
Author(s):  
F. C. Brenner
Keyword(s):  
Weight Loss ◽  
Wear Test ◽  
Groove Depth ◽  
High Rate ◽  
Weight Changes ◽  
Wear Rates ◽  
Weight Loss Method ◽  
Loss Method ◽  
And Storage ◽  
Low Rate

Abstract Tread wear rates during first wear measured by groove depth and weight changes do not always agree. Sometimes, the groove depth method shows a high rate and the weight loss method a low rate. Reported here are experiments designed to determine if grooves show depth changes without wear. Four tires were measured before mounting on a wheel, after mounting and inflation, and after inflation and storage. The mounted and inflated tires showed shallower shoulder grooves and deeper center grooves than the unmounted tires. In a second experiment, tires were measured immediately after a tread wear test and then stored mounted for two weeks before remeasuring. Each groove became deeper, and there was no change in the crown radius of any tire.

PROGNOSTIC VALUE OF COMBINATION AIMS65 AND MELD SCORES IN CIRRHOTIC PATIENTS WITH ACUTE VARICEAL BLEEDING

2019 ◽  
pp. 35-40
Author(s):  
Thi Nhung Nguyen ◽  
Trung Nam Phan ◽  
Van Huy Tran
Keyword(s):  
Clinical Practice ◽  
Portal Hypertension ◽  
Key Words ◽  
Variceal Bleeding ◽  
Prognostic Value ◽  
High Rate ◽  
Central Hospital ◽  
Acute Variceal Bleeding ◽  
Cirrhotic Patients ◽  
Sensitivity Specificity

Bacground: Variceal bleeding is a severe complication of portal hypertension due to cirrhosis with high rate of motality, hence, predicting early rebleeding and mortality in cirrhotic patients with acute variceal bleeding is vital in clinical practice. Objectives: To evaluate the prognostic value of the combination of AIMS65 and MELD scores in predicting first 5 days in-hospital rebleeding and mortality in cirrhotic patients with acute variceal bleeding. Materials and Methods: 44 cirrhotic patients with acute variceal bleeding hospitalized at Hue Central Hospital. MELD and AIMS65 scores were calculated within the first 24 hours and monitoring rebleeding and mortality in the first 5 days in these patients. Results: AIMS65, MELD scores can predict first 5 days rebleeding and mortality with AUROC are 0.81, 0.69 and 0.92, 0.95, respectively. Combination of AIMS65 and MELD scores can predict first 5 days in hospital rebleeding with AUROC is 0.84, sensitivity 83.3%, specificity 81.6% (p<0.001) and mortality with AUROC is 0.96, sensitivity 100%, specificity 92.7% (p<0.001). Conclusions: The combination of AIMS65 and MELD scores increased the sensitivity, specificity and prognostic value in predicting first 5 days in-hospital rebleeding and mortality in cirrhotic patients with acute variceal bleeding in compare to each single scores. Key words: AiMS65 score, MELd, acute variceal bleeding

scholarly journals Combining High- and Low-Rate Geodetic Data Analysis for Unveiling Rapid Magma Transfer Feeding a Sequence of Violent Summit Paroxysms at Etna in Late 2015

2021 ◽  
Vol 11 (10) ◽  
pp. 4630
Author(s):  
Alessandro Bonforte ◽  
Flavio Cannavò ◽  
Salvatore Gambino ◽  
Francesco Guglielmino
Keyword(s):  
Ground Deformation ◽  
High Rate ◽  
Rate Data ◽  
Scale Analysis ◽  
Feeding System ◽  
Magma Sources ◽  
Mt Etna ◽  
Multi Temporal ◽  
Gnss Measurements ◽  
Low Rate

We propose a multi-temporal-scale analysis of ground deformation data using both high-rate tilt and GNSS measurements and the DInSAR and daily GNSS solutions in order to investigate a sequence of four paroxysmal episodes of the Voragine crater occurring in December 2015 at Mt. Etna (Italy). The analysis aimed at inferring the magma sources feeding a sequence of very violent eruptions, in order to understand the dynamics and to image the shallow feeding system of the volcano that enabled such a rapid magma accumulation and discharge. The high-rate data allowed us to constrain the sources responsible for the fast and violent dynamics of each paroxysm, while the cumulated deformation measured by DInSAR and daily GNSS solutions, over a period of 12 days encompassing the entire eruptive sequence, also showed the deeper part of the source involved in the considered period, where magma was stored. We defined the dynamics and rates of the magma transfer, with a middle-depth storage of gas-rich magma that charges, more or less continuously, a shallower level where magma stops temporarily, accumulating pressure due to the gas exsolution. This machine-gun-like mechanism could represent a general conceptual model for similar events at Etna and at all volcanoes.

PARAMETERS FOR DYNAMIC SIMULATION OF W ASTEW ATER TREATMENT PLANTS WITH HIGH-RATE AND LOW-RATE ACTIVATED SLUDGE TANKS

1994 ◽  
Vol 30 (4) ◽  
pp. 211-214 ◽  
Author(s):  
E. Brands ◽  
M. Liebeskind ◽  
M. Dohmann
Keyword(s):  
Wastewater Treatment ◽  
Activated Sludge ◽  
Dynamic Simulation ◽  
Municipal Wastewater ◽  
Wastewater Treatment Plants ◽  
High Rate ◽  
Yield Coefficient ◽  
Municipal Wastewater Treatment ◽  
Municipal Wastewater Treatment Plants ◽  
Low Rate

This study shows a comparison of important parameters for dynamic simulation concerning the highrate and low-rate activated sludge tanks of several municipal wastewater treatment plants. The parameters for the dynamic simulation of the single-stage process are quite well known, but parameters for the high-ratellow-rate activated sludge process are still missi ng, although a considerable number of wastewater treatment plants are designed and operated that way. At present any attempt to simulate their operation is restricted to the second stage due to missing data concerning growth rate, decay rate, yield coefficient and others.

Noncontingent Nonreinforcement of a Response as the Aversive Event in a Cer Paradigm

1971 ◽  
Vol 29 (3_suppl) ◽  
pp. 1196-1198 ◽  
Author(s):  
Richard S. Calef ◽  
Richard A. Kaufman ◽  
Ronald N. Bone ◽  
Steven A. Werk
Keyword(s):  
Reinforcement Schedule ◽  
Present Experiment ◽  
High Density ◽  
High Rate ◽  
Aversive Event ◽  
Necessary Condition ◽  
Facilitation Effect ◽  
Response Facilitation ◽  
Early Training ◽  
Low Rate

The present experiment investigated the effects of noncontingent nonreinforcement as the aversive event in a CER paradigm. The results showed a significant response-facilitation effect during early training, but none during later training with a high rate-producing, high-density reinforcement schedule. The present results imply that a low rate-producing, high-density reinforcement schedule is not a necessary condition for response facilitation.

Scenario Prediction of China’s Natural Gas Consumption and Carbon Emissions in the Next Ten Years

2021 ◽  
Vol 16 (3) ◽  
pp. 569-587
Author(s):  
Chunzi Wang ◽  
◽  
Mingxiong Zhu ◽  
Keyword(s):  
Economic Growth ◽  
Natural Gas ◽  
Emission Reduction ◽  
Carbon Emission ◽  
Gas Production ◽  
High Rate ◽  
Carbon Emission Reduction ◽  
Gas Consumption ◽  
Natural Gas Consumption ◽  
Low Rate

Based on Johansen Cointegration Test, this paper sheds light on the long-run equilibrium relationship between natural gas consumption, gas production, and GDP in China. Three different natural gas demand scenarios of low, medium and high rates in the next ten years are considered, and a Neural Network Autoregression Model is used to predict the future carbon dioxide emission. We conclude: (1) In all three scenarios, the growth rates of natural gas consumption are all higher than those of natural gas production, while the gap between demand and domestic supply will gradually turn broader and China will largely rely on imports ; (2) In the scenario of low-rate economic growth, natural gas consumption will grow slowly, and it will be difficult to realize the carbon emission reduction targets by 2030 due to low-rate substitution of natural gas for coal; (3) If medium-rate to high-rate economic growth sustains, coupled with rapid increase in natural gas consumption and production, China’s Carbon Emission Reduction Targets for 2030 can be achieved with high-rate substitution of natural gas for coal.

PENGARUH PUPUK ORGANIK DAN ANORGANIK ZA DAN SP 36 TERHADAP HASIL DAN MUTU TEMBAKAU TEMANGGUNG PADA TANAH ANDISOL

2020 ◽  
Vol 8 (1) ◽  
pp. 32
Author(s):  
DJAJADI DJAJADI ◽  
M. SHOLEH ◽  
NUNUNG SUDIBYO
Keyword(s):  
Key Words ◽  
Ammonium Sulfate ◽  
Ammonium Sulphate ◽  
Organic Fertilizer ◽  
Growth Yield ◽  
Yield And Quality ◽  
Stable Manure ◽  
Grade Index

Effect of organic (biogrcen) and inorganic fetilizers (ammonium sulphate and SP36) on the yield and quality of the temanggung tobacco in andosol soil was studied at Galapansari - Temanggung, from Februai to December 2001. The organic and inorganic fetilizers were formulated in 10 packages, namely : (1) 570 kg ammonium sulphate (AS) ♦ 100 kg SP36; (2) the recommended rate for temanggung tobacco (20 000 kg stable manure 500 kg AS + 100 kg SP36; (3) 5 000 kg organic fetilizer (OF); (4) 7 500 kg OF; (5) 8 500 kg OF; (6) 10 000 kg OF; (7) 12 500 kg OF; (8) 14 500 kg OF; (9) 7 500 kg OF + 3 500 kg sUble manure (SM); (10) 7 500 kg OF + 4 500 kg SM. All the rates of fetilizers were based on one hectare planted area (16 500 plants) The expeiment was designed as a randomized block in four replicates. Results showed that organic fertilizer waa more effective than stable manure in improving die growth, yield and quality of temanggung tobacco. A the rate of 5 000 kg was sufficient to produce high ( 6 313 kg fresh or 800 kg sliced died leaves), grade index (51.68) and crop index (55.31). Key words : Organic fetilizer, ammonium sulfate, SP36, temanggung tobacco, andisol

China's Population Aging and New Urbanization

2016 ◽  
pp. 106-124
Author(s):  
Mingxing Chen ◽  
Hua Zhang ◽  
Yinghua Gong
Keyword(s):  
Chinese Population ◽  
Population Aging ◽  
High Rate ◽  
Natural Growth ◽  
The Sustainable Development ◽  
Aged Population ◽  
The World ◽  
Long Time ◽  
Low Rate ◽  
New Urbanization

In recent years, fast demographic transition, urbanizationand socio-economic development in China draws attention of the world. The reproduction type of Chinese population has changed from “high rate of birth, high rate of death, and low rate of natural growth” to “low rate of birth, low rate of death, and low rate of natural growth”, which promotes the population transition, bringing the problems of aging of population. In China, the scale of aged population is large, and its developing speed is fast. Along with the increasing of aged population in China, the advantage of labor quantity in China is challenged. China regards new urbanization as the important work content of state in the future for a long time, providing a large opportunity for the study in the field of urbanization. For China, new urbanization plan is just a beginning. The sustainable development of Chinese population and urbanization has important meaning in the world.

Herbicide Concentrations in Honey Mesquite Phloem

Weed Science ◽  
1972 ◽  
Vol 20 (3) ◽  
pp. 264-267 ◽  
Author(s):  
F. S. Davis ◽  
R. E. Meyer ◽  
J. R. Baur ◽  
R. W. Bovey
Keyword(s):  
Acetic Acid ◽  
Prosopis Juliflora ◽  
High Rate ◽  
Soil Line ◽  
Herbicide Concentration ◽  
Low Rate ◽  
Honey Mesquite

Herbicide content in honey mesquite(Prosopis juliflora(Swartz) DC. var.glandulosa(Torr.) Cockerell) phloem 48 hr after treatment was higher in stems within 20 cm of the foliage than in those near the soil line. Similar levels of (2,4,5-trichlorophenoxy)acetic acid (2,4,5-T) occurred from applications of either 0.56 or 1.12 kg/ha, whereas three times as much 4-amino-3,5,6-trichloropicolinic acid (picloram) occurred in plants sprayed with the high rate than in those sprayed with the low rate. Herbicide concentration was highest in June and lowest in August.

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