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You searched for: Journal name Agronomy journal Remove constraint Journal name: Agronomy journal Source 1993 v.85 no.3 Remove constraint Source: 1993 v.85 no.3 Subject term soil water content Remove constraint Subject term: soil water content
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1. Bahiagrass Canopy Size, Soil Water, and Establishment of Aeschynomene

Author:
R. S. Kalmbacher; F. G. Martin; L. C. Hammond; K. J. Boote; P. Mislevy
Source:
Agronomy journal 1993 v.85 no.3 pp. 535-540
ISSN:
0002-1962
Subject:
Aeschynomene americana; pasture plants; Paspalum notatum; sward; canopy; soil water potential; soil water content; seedlings; evapotranspiration; rain; Florida
Abstract:
... Aeschynomene americana L. is a tropical pasture legume, and in Florida, where it is usually grown with bahiagrass (Paspalum notatum Flügge), there are about 5000 ha. Limited soil water is a primary reason for stand failure of this annual. Soil water in three bahiagrass canopy sizes: small (2.2 leaf area index [LAI]), medium (4.5 LAI) and large (7.7 LAI) was measured at seeding and related to aesch ...
DOI:
10.2134/agronj1993.00021962008500030003x

2. Development of Double-Crop Soybean under Different Soil Water Regimes

Author:
R. C. Pearce; L. J. Grabau; J. H. Grove; H. Lin
Source:
Agronomy journal 1993 v.85 no.3 pp. 576-583
ISSN:
0002-1962
Subject:
Glycine max; double cropping; Triticum aestivum; soil water content; crop yield; seeds; rain; dry environmental conditions; water stress; drought; sowing date; Kentucky
Abstract:
... Double-crop soybean [Glycine max (L.) Merr.] comprises nearly one-third of the total soybean hectarage in the southeasteirn USA. This study was initiated to investigate the water relations of soybean following winter wheat [Triticum aestivum (L.) emend. Thcll], with emphasis on the role of stored soil water. A treatment scheme was devised in which wheat was killed at heading, mid-grain fill, and m ...
DOI:
10.2134/agronj1993.00021962008500030011x

3. ENWATBAL.BAS: a Mechanistic Evapotranspiration Model Written in Compiled Basic

Author:
S. R. Evett; R. J. Lascano
Source:
Agronomy journal 1993 v.85 no.3 pp. 763-772
ISSN:
0002-1962
Subject:
simulation models; evapotranspiration; soil temperature; soil water content; data analysis; statistical analysis; computer software; microcomputers; prediction
Abstract:
... ENWATBAL, a mechanistic energy, water balance model originally written in the Continuous System Modeling Program (CSMP) simulation language, was largely incompatible with personal computers (PCs). ENWATBAL.BAS was developed to extend the model application to PCs using BASIC, which is widely available. BASIC functions or subprograms were provided to emulate CSMP language commands including integrat ...
Handle:
10113/718
DOI:
10.2134/agronj1993.00021962008500030044x

4. Leaf Expansion in Field-Grown Sunflower in Response to Soil and Leaf Water Status

Author:
V. O. Sadras; F. J. Villalobos; E. Fereres
Source:
Agronomy journal 1993 v.85 no.3 pp. 564-570
ISSN:
0002-1962
Subject:
Helianthus annuus; leaf area; leaves; leaf water potential; soil water content; dry environmental conditions; root systems; irrigated conditions; spring; summer; water stress; Spain
Abstract:
... Leaf responses to soil water deficits in controlled environaments may be mediated by nonhydraulic root signals (RS). The aim uf this study was to evaluate in the field the effects of RS and leaf water potential (Ψ¹) on leaf expansion rate (LER) of sunflower (Helianihus annuus L.). Two experiments were performed on a deep sandy-loam soil (Typic Xerofluvent) in a Mediterranean environment under spri ...
DOI:
10.2134/agronj1993.00021962008500030009x

5. Light Transmittance, Soil Temperature, and Soil Moisture under Residue of Hairy Vetch and Rye

Author:
J. R. Teasdale; C. L. Mohler
Source:
Agronomy journal 1993 v.85 no.3 pp. 673-680
ISSN:
0002-1962
Subject:
Secale cereale; Vicia villosa; cover crops; crop residues; biomass; weeds; seed germination; soil temperature; soil water content; cultural control; weed control; crop residue management; Maryland; New York
Abstract:
... Cover crop residue on the surface of soils in no-tillage systems can suppress weed emergence and growth. Although allelopathy often is invoked to explain weed suppression by residue, physical alterations of the seed environment could be important as well. This experiment was conducted to determine the light, temperature, and moisture conditions under cover crop residue. Hairy vetch (Vicia villosa ...
DOI:
10.2134/agronj1993.00021962008500030029x

6. Logistic Response of Bermudagrass and Bunchgrass Cultivars to Applied Nitrogen

Author:
A. R. Overman; M. A. Sanderson; R. M. Jones
Source:
Agronomy journal 1993 v.85 no.3 pp. 541-545
ISSN:
0002-1962
Subject:
interspecific variation; cultivars; mathematical models; forage crops; Panicum coloratum; application rate; soil water content; Cynodon dactylon; arid zones; dry matter accumulation; crop yield; rain; growth models; Eragrostis curvula; Cenchrus ciliaris; nitrogen fertilizers; Texas
Abstract:
... Models provide a quantitative means to evaluate yield response of forage grasses to applied N and water availability. The objective of this analysis was to estimate model parameters (A, b, c) for bermu. dagrasses and bunchgrasses grown at the same location and during the same time period. The logistic equation was used to relate annual dry matter production to applied N for three bermudagrasses [C ...
DOI:
10.2134/agronj1993.00021962008500030004x

7. Management and Environment Effects on Dry Matter Yields of Three Brassica Species

Author:
M. Hagemann Wiedenhoeft
Source:
Agronomy journal 1993 v.85 no.3 pp. 549-553
ISSN:
0002-1962
Subject:
harvest date; interspecific variation; Brassica rapa subsp. pekinensis; hybrids; sowing date; soil water content; grazing; air temperature; dry matter accumulation; regrowth; forage; crop yield; Brassica napus; Brassica rapa subsp. oleifera; cold; Maine
Abstract:
... Brassica crops have potential use as a forage during summer, fall, and early winter months. The influence of planting date and harvest date on the initial and regrowth herbage yields for three Brassica species: rape (B. napus L., ‘Winfred’ in 1987 and ‘Emerald’ in 1988 and 1989), turnip (B. rapa L., ‘Purple Top’), and a turnip hybrid (B. rapa × B. pekinensis L., ‘Tyfon’) were investigated. The spe ...
DOI:
10.2134/agronj1993.00021962008500030006x

8. Residual Effects of Soil Profile Modification on Water Infiltration, Bulk Density, and Wheat Yield

Author:
Paul W. Unger
Source:
Agronomy journal 1993 v.85 no.3 pp. 656-659
ISSN:
0002-1962
Subject:
Triticum aestivum; crop yield; site preparation; soil texture; clay loam soils; soil profiles; soil density; bulk density; soil water content; water use efficiency; residual effects; preplanting treatment; grains; Texas
Abstract:
... Fine-textured soils of the Southern High Plains, of which Pullman (fine, mixed, thermic Torrertic Paleustolls) is the dominant series,/ have inherently low water infiltration rates. Pullman soils have a moderately permeable surface horizon overlying and slowly-permeable Bt horizon, which limits deep water penetration, thus hampering water conservation efforts and reducing water-use efficiencies Ib ...
DOI:
10.2134/agronj1993.00021962008500030025x

9. Resumption of Water Uptake by Sorghum after Water Stress

Author:
X. Xu; W. L. Bland
Source:
Agronomy journal 1993 v.85 no.3 pp. 697-702
ISSN:
0002-1962
Subject:
Sorghum bicolor; water stress; duration; root systems; water uptake; transpiration; leaf water potential; soil water content; drought tolerance; dry environmental conditions; root shoot ratio; Texas
Abstract:
... Exposure of roots to dry soil may reduce their ability to absorb water when the soil is rewet. We sought to quantify the effects of the duration of exposure to dry soil and the availability of water in deeper soil layers on resumption of water uptake by roots of Sorghum bicolor (L.) Moench following rewetting of the soil. Plants were grown in a greenhouse in pots, half of which were fitted with a ...
DOI:
10.2134/agronj1993.00021962008500030033x

10. Soil Temperature, Soil Water, and No-Till Corn Development Following In-Row Residue Removal

Author:
M.-C. Fortin
Source:
Agronomy journal 1993 v.85 no.3 pp. 571-576
ISSN:
0002-1962
Subject:
height; plant characteristics; Zea mays; no-tillage; crop residues; dry environmental conditions; soil temperature; soil water content; vegetative growth; sexual reproduction; heading; crop yield; grains; conventional tillage; crop residue management; arid zones; Ontario
Abstract:
... In northern areas where corn (Zea mays L.) is grown, no-till plants develop more slowly and, consequently, could be more susceptible to soil water limitations than plants under conventional tillage. This study was conducted to determine if removing in-row residues by pushing them into the interrow can solve problems related to no-till corn development in droughty soils. Residues were removed to pr ...
DOI:
10.2134/agronj1993.00021962008500030010x

11. Sub-Root Zone Layering: Effects on Water Retention in Sports Turf Soil Profiles

Author:
D. H. Taylor; S. D. Nelson; C. F. Williams
Source:
Agronomy journal 1993 v.85 no.3 pp. 626-630
ISSN:
0002-1962
Subject:
gravel; soil water content; athletic fields; lawns and turf; mixtures; soil texture; soil profiles; soil water retention; drainage; sand
Abstract:
... Sports turf areas are often constructed by placing a root zone soil mixture over coarse-textured layers such as sand or gravel. The objective of this research was to determine the degree to which drainage from and water retention in soil mixtures were affected I~.y properties of the underlying layers. In a laboratory experiment, soil water matric potential energies (Ψₘ) and mass water contents (θₘ ...
DOI:
10.2134/agronj1993.00021962008500030020x