Soil fertility changes in the long-term experimental plots at Kybybolite, South Australia. I. Changes in pH total nitrogen, organic carbon, and bulk density.

1960 ◽  
Vol 11 (6) ◽  
pp. 902 ◽  
Author(s):  
JS Russell
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
Organic Carbon ◽  
Bulk Density ◽  
Soil Nitrogen ◽  
Organic Matter Content ◽  
Matter Content ◽  
Water Soluble ◽  
Research Centre ◽  
Rate Of Increase

Variously treated grassland plots at the Kybybolite Research Centre established in 1919 on solonetzic soils were sampled in 1957–58. Analyses of the soils and for pH and nitrogen were made and compared with earlier analyses made in 1938. Bulk density and organic carbon were also determined. Treatment with phosphorus fertilizers and grazing with sheep has resulted in large increases in the organic matter content of the surface soil. A large part of the increase has been concentrated in the 0–2 in. horizon. At the 6–8 in. level, increases have been small. When considered on the basis of pounds per acre, the increase in soil nitrogen in the surface 6 in. of some plots appears to be linear with time, and even after 39 years shows no signs of approaching an asymptotic value. However, there appears to be differential behaviour within the soil profile. The rate of increase of the 0–2 in. horizon in recent years shows signs of being much less than in the earlier years of the experiment. On the other hand, in the 2–4 and 4–6 in. horizons the recent rate of increase is similar to or greater than that in earlier years, which indicates that a deepening of the organic matter profile is occurring. There appears to be some relation between the increase in soil nitrogen and sheep-carrying capacity. The increase in soil nitrogen on the soils from the plots has been, on the average, equivalent to 14 lb of soil nitrogen per sheep per acre per year. Additional calcium applied with water-soluble phosphorus appears to result in higher levels of soil organic matter. Lime, in particular, appears to result in the highest levels of soil organic matter. Analysis of the soils shows that the increase in soil organic matter is associated with a slight decrease in pH. The soils also show a decrease in bulk density which is closely related to changes in organic matter content. Various aspects of organic matter accumulation are discussed, particularly the importance of the time factor in this process and the lack of a causal relationship between the amount of superphosphate applied and the increase in organic matter.

scholarly journals Soil nitrogen supply of peat grasslands estimated by degree days and soil organic matter content

2020 ◽  
Vol 117 (3) ◽  
pp. 351-365
Author(s):  
J. Pijlman ◽  
G. Holshof ◽  
W. van den Berg ◽  
G. H. Ros ◽  
J. W. Erisman ◽  
...  
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
Soil Nitrogen ◽  
Organic Matter Content ◽  
Matter Content ◽  
Nitrogen Supply ◽  
Degree Days ◽  
Soil Organic Matter Content ◽  
Soil Nitrogen Supply

scholarly journals Soil properties during transition from conventional to organic farming system in Kavre District, Nepal

2018 ◽  
Vol 13 (1) ◽  
pp. 76-84
Author(s):  
Biboss Maharjan ◽  
Anon Chaulagain ◽  
Parikrama Sapkota ◽  
Dhurva P. Gauchan ◽  
Janardan Lamichanne
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
Bulk Density ◽  
Organic Farming ◽  
Ph Value ◽  
Organic Matter Content ◽  
Farming System ◽  
Matter Content ◽  
Soil Samples ◽  
Organic Farming System

 The aim of this study was to investigate the response of soil physical and chemical properties during the transition from conventional to organic farming system. Soil samples were collected from five different farms: “Hasera organic farm” under 10 years of organic farming, “Everything organic nursery” under 5 years of organic farming, “Grameen Krishi” under 3 years of transition from conventional to organic, “Gautamshree farm” under 1 years of transition from conventional to organic and “Kuntabeshi farm” under IPM practice as reference. Soil bulk density, moisture content, texture, NPK, CEC and soil organic matter was evaluated in soil samples collected at 0-15 cm. Soil organic matter (5.45%) was highest in Hasera farm, whereas lowest bulk density (1.02gcm-3) was also in Hasera farm. Lowest soil organic matter content was found in Gautamshree farm. Soils of all farms were under loam texture. Soil macronutrients were highest in Grameen Krishi farm. The overall pH value of all soil samples was slightly acidic to acidic.Kathmandu University Journal of Science, Engineering and TechnologyVol. 13, No. 1, 2017, Page: 76-84

RELATIONS ENTRE LA TENEUR EN MATIÈRE ORGANIQUE ET LA MASSE VOLUMIQUE APPARENTE DU SOL

1986 ◽  
Vol 66 (4) ◽  
pp. 743-746 ◽  
Author(s):  
D. A. ANGERS ◽  
R. R. SIMARD
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
Key Words ◽  
Bulk Density ◽  
Soil Compaction ◽  
Organic Matter Content ◽  
Soil Bulk Density ◽  
Matter Content ◽  
Soil Organic Matter Content ◽  
Masse Volumique

As a part of a study on soil compaction, measurements of soil bulk density were taken three times during the season at five sites and three depths. Strong negative correlations were obtained between soil organic matter content and (1) soil bulk density and, (2) the increase in bulk density during the season. Key words: Bulk density, compaction, organic matter

scholarly journals KAJIAN SIFAT FISIKA EMPAT TANAH UTAMA DI SUMATERA BARAT

Jurnal Solum ◽  
2007 ◽  
Vol 4 (2) ◽  
pp. 81
Author(s):  
Yulnafatmawita Yulnafatmawita ◽  
Asmar Asmar ◽  
Ari Ramayani
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
Bulk Density ◽  
Organic Matter Content ◽  
Total Porosity ◽  
Matter Content ◽  
Available Water ◽  
Physical Study ◽  
West Sumatra ◽  
Plant Available Water

A research about soil physical study of four main soils found in West Sumatra was conducted in 2006.  The research was aimed to determine some soil physical properties of four soil which are mostly found in West Sumatra.  The four soil orders assessed were Ultisol from Agricultural Expreriment Station Limau Manis, Oxisol from Lubuk Minturun, Entisol from Tabing Kecamatan Koto Tangah Padang, dan Andisol from Bukik Gompong Kabupaten Solok.  The result showed that at the depth of 0-20 cm soil profile.  Ultisol and Oxisol had finer texture than those of Andisol and Entisol.  Andisol was dominated by silt while Entisol was dominated by sand particles.  Andisol had the lowest bulk density and the highest soil organic matter and total porosity.  Soil Organic matter content of Entisol, Oxisol, and Ultisols was low in criteria.  Plant available water (PAW) was higher in Oxisol, then followed by Andisol, Ultisol, and Entisol.Key words: Organic matter, bulk density, texture, porosity, plant available water

scholarly journals Organic carbon dynamics in interrows of Vitis vinifera with different years of soil use and management

2021 ◽  
Vol 10 (3) ◽  
pp. e10610311840
Author(s):  
Caroline Valverde dos Santos ◽  
Renato Levien ◽  
Michael Mazurana ◽  
Lucas Zulpo
Keyword(s):  
Organic Matter ◽  
Organic Carbon ◽  
Vitis Vinifera ◽  
Bulk Density ◽  
Carbon Stock ◽  
Organic Matter Content ◽  
Carbon Stocks ◽  
Matter Content ◽  
Native Grassland ◽  
Reference Samples

This study aimed to evaluate the effects of soil use and management on organic carbon stocks in the interrows of Vitis vinifera with different years of cultivation. A vineyard located in Rio Grande do Sul state, with 4, 9 and 16 years of management, was evaluated. Soil samples from different layers, 0.0-0.10, 0.10-0.20, 0.20-0.30, 0.30-0.40, 0.40-0.50 and 0.50-0.60 m, were collected on wheel tracks, between wheel tracks and under the planting rows. As a reference, samples were collected in native grassland of the region. Organic matter content, bulk density and soil porosity were evaluated. Carbon stock was determined according to the correction of the sampled thickness. The results were subjected to analysis of variance and means were compared by Tukey test at 0.05 probability level. Soil management caused alterations in its structure and organic matter content, observed mainly in the first 30 cm, regardless of the area studied. Highest values of bulk density were observed on the tractor wheel tracks, followed by under the planting row and between wheel tracks. Alteration in soil cover for vineyard planting led to a reduction in the carbon stock, compared to the native grassland. The area under management for 4 years showed higher carbon stocks between the wheel tracks, whereas the areas under 9 and 16 years of management showed highest values in the wheel tracks.

Adsorption, Mobility, and Efficacy of Metribuzin as Influenced by Soil Properties

Weed Science ◽  
1985 ◽  
Vol 33 (6) ◽  
pp. 868-873 ◽  
Author(s):  
C. John Peter ◽  
Jerome B. Weber
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
Surface Area ◽  
Water Solubility ◽  
Organic Matter Content ◽  
Matter Content ◽  
Water Soluble ◽  
Soil Parameters ◽  
Glycol Monoethyl Ether ◽  
Highly Correlated

The effect of various soil parameters on metribuzin [4-amino-6-(1,1-dimethylethyl)-3-(methylthio)-1,2,4-triazin-5(4H)-one] efficacy was studied on seven soils and metribuzin adsorption was investigated in nine soils. Soil organic-matter and clay contents were correlated with metribuzin activity. Specific surface area, as measured by ethylene glycol monoethyl ether (EGME) was highly correlated with metribuzin activity. Soil organic-matter content and EGME surface area measurements were also highly correlated with metribuzin adsorption in soils. Since metribuzin is highly water soluble (water solubility greater than 1000 ppm), it was probably adsorbed at the hydrophilic sites on the soil surfaces that were measured by EGME. Metribuzin was much more mobile than atrazine [6-chloro-N-ethyl-N′-(1-methylethyl)-1,3,5-triazine-2,4-diamine] in a leaching study.

scholarly journals Effect of Clay, Soil Organic Matter, and Soil pH on Initial and Residual Weed Control with Flumioxazin

Agronomy ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1326
Author(s):  
Calvin F. Glaspie ◽  
Eric A. L. Jones ◽  
Donald Penner ◽  
John A. Pawlak ◽  
Wesley J. Everman
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
Weed Control ◽  
Soil Ph ◽  
Organic Matter Content ◽  
Amaranthus Retroflexus ◽  
Matter Content ◽  
Weed Species ◽  
Soil Organic Matter Content ◽  
Field Soils

Greenhouse studies were conducted to evaluate the effects of soil organic matter content and soil pH on initial and residual weed control with flumioxazin by planting selected weed species in various lab-made and field soils. Initial control was determined by planting weed seeds into various lab-made and field soils treated with flumioxazin (71 g ha−1). Seeds of Echinochloa crus-galli (barnyard grass), Setaria faberi (giant foxtail), Amaranthus retroflexus (redroot pigweed), and Abutilon theophrasti (velvetleaf) were incorporated into the top 1.3 cm of each soil at a density of 100 seeds per pot, respectively. Emerged plants were counted and removed in both treated and non-treated pots two weeks after planting and each following week for six weeks. Flumioxazin control was evaluated by calculating percent emergence of weeds in treated soils compared to the emergence of weeds in non-treated soils. Clay content was not found to affect initial flumioxazin control of any tested weed species. Control of A. theophrasti, E. crus-galli, and S. faberi was reduced as soil organic matter content increased. The control of A. retroflexus was not affected by organic matter. Soil pH below 6 reduced flumioxazin control of A. theophrasti, and S. faberi but did not affect the control of A. retroflexus and E. crus-galli. Flumioxazin residual control was determined by planting selected weed species in various lab-made and field soils 0, 2, 4, 6, and 8 weeks after treatment. Eight weeks after treatment, flumioxazin gave 0% control of A. theophrasti and S. faberi in all soils tested. Control of A. retroflexus and Chenopodium album (common lambsquarters) was 100% for the duration of the experiment, except when soil organic matter content was greater than 3% or the soil pH 7. Eight weeks after treatment, 0% control was only observed for common A. retroflexus and C. album in organic soil (soil organic matter > 80%) or when soil pH was above 7. Control of A. theophrasti and S. faberi decreased as soil organic matter content and soil pH increased. Similar results were observed when comparing lab-made soils to field soils; however, differences in control were observed between lab-made organic matter soils and field organic matter soils. Results indicate that flumioxazin can provide control ranging from 75–100% for two to six weeks on common weed species.

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