Kriging of Eocene Sand Channels From Depth-Averaged I Overburden pH, Jewett Lignite Surface Mine, East-Central Texas

1995 ◽  
Vol I (2) ◽  
pp. 173-190
Author(s):  
S. ALTIS ◽  
N. R. TILFORD
Keyword(s):  
Surface Mine ◽  
East Central ◽  
Central Texas

Natural Revegetation of an Unreclaimed Lignite Surface Mine in East-Central Texas

1990 ◽  
Vol 35 (4) ◽  
pp. 434 ◽  
Author(s):  
J. G. Skousen ◽  
C. A. Call ◽  
R. W. Knight
Keyword(s):  
Surface Mine ◽  
East Central ◽  
Natural Revegetation ◽  
Central Texas

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

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

ASSESSMENT OF THE APPLICABILITY OF AN ANOXIC LIMESTONE DRAIN FOR A SURFACE MINE IN EAST CENTRAL TENNESSEE

1996 ◽  
Vol 1996 (1) ◽  
pp. 384-390
Author(s):  
TERRY W. SCHMIDT ◽  
ROBERT S. HEDIN ◽  
P. R. LORELLO
Keyword(s):  
Surface Mine ◽  
East Central ◽  
Limestone Drain
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