Soil Characteristics and Grass Rooting Habits of Two Soil Types in East-Central Texas

1970 ◽  
Vol 14 (4) ◽  
pp. 377 ◽  
Author(s):  
G. L. Van Amburg ◽  
J. D. Dodd
Keyword(s):  
Soil Characteristics ◽  
Soil Types ◽  
East Central ◽  
Central Texas

scholarly journals Relações entre características químicas do solo e crescimento de Araucaria angustifolia (Bert.) O. Ktze., em Passo Fundo, RS

1983 ◽  
Vol 5 (5) ◽  
pp. 95
Author(s):  
Carmeli Antonia Cassol ◽  
Ari Zago
Keyword(s):  
Soil Characteristics ◽  
Soil Samples ◽  
Soil Types ◽  
Chemical Characteristics ◽  
Araucaria Angustifolia ◽  
Gley Soil ◽  
Growth Variation ◽  
Chemical Soil

The present work shows chemical soil characteristics and growth in plantings of Araucaria angustifolia, implanted in different soil types, in Passo Fundo, RS National Forest.Soils types were classified as Latosol Roxo, Lithosol Eutrophic Soil and Low-Humic Gley. Soil samples were taken randomly at 0 - 20cm deep in 400 m² area square plots. The chemical characteristics of the studied soils were related to growth variables by simple linear correlation.According to the findings, the chemical soil chemical characteristics were not considered adequate parameters to explain the growth variation observed for Araucaria angustifolia.

scholarly journals Methods for soil enhancement in geoheritage research: a case study from Veglia-Devero Natural Park (Lepontine Alps)

2021 ◽  
Author(s):  
Anna Masseroli ◽  
Irene M. Bollati ◽  
Luca Trombino ◽  
Manuela Pelfini
Keyword(s):  
Late Quaternary ◽  
Chemical Properties ◽  
Soil Characteristics ◽  
Parent Material ◽  
Soil Types ◽  
Conservation Strategies ◽  
Soil Profiles ◽  
Mountain Environments ◽  
Natural Park ◽  
Lepontine Alps

<p>In mountain environments, the high variability of soil forming factors (i.e., parent material, climate, relief, organism, time) is responsible for the presence of different soil types, which not only contribute to the pedodiversity but are also a component of the local cultural heritage.</p><p>Up to now, scarce attention has been paid to the soil in the geoheritage/geoconservation scientific analyses.</p><p>To promote soil as element concurring to mountain geoheritage definition, we propose a strategy to include pedological topics within a multidisciplinary trail planned in the Veglia-Devero Natural Park (Lepontine Alps). The geomorphological dynamicity and environmental change affecting during times the small mountain catchment of Buscagna hydrographic basin are illustrated with a specific address to soil characteristics. The physical and chemical properties, and pedological features of soils reflect the interaction among the other ecosystem components (i.e. geology, geomorphology and vegetation), underlining the role of soil as natural archive for reconstructing landscape evolution and for achieving a more complete assessment of Late Quaternary geomorphic events, especially surface processes.</p><p>Geopedological researches carried out in the study area, allowed to detect 7 soil profiles as potential sites of pedological interest, located in safe and accessible places, along already existing hiking paths. The selected soil profiles not only mirror the main soil types that characterize the area but also represent evidence of past environmental conditions and geomorphic dynamics.</p><p>The opportunities for hikers and mountaineers, to observe the exposed soils along the Buscagna valley, thanks to the presence of erosional scarps and subsidence areas, allow also to get more awareness of the need of geoheritage conservation strategies addressed to soil, especially in the mountain landscape where soil characteristics reflect the striking influence of its forming factors.</p>

Influence of Johnsongrass (Sorghum halepense) Density and Period of Competition on Cotton Yield

Weed Science ◽  
1987 ◽  
Vol 35 (1) ◽  
pp. 63-67 ◽  
Author(s):  
David C. Bridges ◽  
James M. Chandler
Keyword(s):  
Yield Loss ◽  
Sorghum Halepense ◽  
Yield Potential ◽  
Yield Response ◽  
Cotton Yield ◽  
Critical Periods ◽  
East Central ◽  
Central Texas ◽  
Competition Period ◽  
Significant Yield

Research was conducted from 1982 through 1984 on a Shipps clay soil (Udic chromustert) in east-central Texas to determine the density-dependent effects and critical periods of johnsongrass [Sorghum halepense(L.) Pers. # SORHA] competition with cotton (Gossypium hirsutumL.). Two experiments were conducted each year, one to assess cotton yield response to increasing johnsongrass density and the second to establish the johnsongrass-free requirement of cotton and the johnsongrass competition period. A critical minimum density of 2 plants/9.8 m of row was observed. Full-season johnsongrass competition densities exceeding 2 plants/9.8 m of row resulted in seed cotton yield reductions each year. Yield decline was most rapid as density increased from 2 to 8 plants/9.8 m of row. Yield loss averaged 1, 4, 14, 40, 65, and 70% for johnsongrass densities of 1, 2, 4, 8, 16, and 32 plants/9.8 m of row, respectively. Percent yield loss was proportional to yield potential at johnsongrass densities of 4 and 8 plants/9.8 m of row. Three to four weeks of rhizome johnsongrass competition or 6 weeks of seedling johnsongrass competition resulted in significant yield reductions. Maintaining cotton johnsongrass free for 4 weeks did not prevent significant yield reductions.

scholarly journals U-Pb detrital zircon geochronology of the Upper Paleocene to Lower Eocene Wilcox Group, east-central Texas

Geosphere ◽  
2016 ◽  
Vol 12 (5) ◽  
pp. 1517-1531 ◽  
Author(s):  
Preston J. Wahl ◽  
Thomas E. Yancey ◽  
Michael C. Pope ◽  
Brent V. Miller ◽  
Walter B. Ayers
Keyword(s):  
Detrital Zircon ◽  
Zircon Geochronology ◽  
Lower Eocene ◽  
East Central ◽  
Detrital Zircon Geochronology ◽  
Central Texas ◽  
Upper Paleocene

Take-all distribution and soil type on Chalky Boulder Clay

1986 ◽  
Vol 106 (1) ◽  
pp. 61-66 ◽  
Author(s):  
J. A. Catt ◽  
R. J. Gutteridge ◽  
D. B. Slope
Keyword(s):  
Winter Wheat ◽  
Grain Yield ◽  
Soil Type ◽  
Soil Characteristics ◽  
Soil Types ◽  
Exchangeable Potassium ◽  
Boulder Clay ◽  
Extractable Phosphorus ◽  
Take All ◽  
Partial Immunity

SUMMARYIn 1980 a field of winter wheat at Little Raveley, Cambridgeshire (U.K.) suffered a bad attack of take-all, which was confined mainly to areas dominated by Ragdale series, one of five soil types on the field. Take-all and yield were assessed on experimental areas within the field in the three subsequent years (1981–3). On a strip 50 m wide, which was sown with wheat in each of these years, take-all was in decline and although slight differences in take-all occurred between some of the soil types, they had no effect on grain yield. Following a break crop of beans in 1981, the remainder of the field carried wheat in 1982 and 1983. Here take-all was generally less and yields generally greater in the area that suffered the 1980 attack, probably because it had developed a natural partial immunity to the disease. However, measurements of takeall in relation to soil characteristics on 1 m2 plots suggested that the disease was becoming more prevalent on soils that are less well drained in winter, are more deeply decalcified, and contain less extractable phosphorus or more exchangeable potassium.

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