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Full-Text Articles in Life Sciences
Column-Scale Unsaturated Hydraulic Conductivity Estimates In Coarse-Textured Homogeneous And Layered Soils Derived Under Steady-State Evaporation From A Water Table, Morteza Sadeghi, Markus Tuller, Mohammed R. Gohardoust, Scott B. Jones
Column-Scale Unsaturated Hydraulic Conductivity Estimates In Coarse-Textured Homogeneous And Layered Soils Derived Under Steady-State Evaporation From A Water Table, Morteza Sadeghi, Markus Tuller, Mohammed R. Gohardoust, Scott B. Jones
Plants, Soils, and Climate Faculty Publications
Steady-state evaporation from a water table has been extensively studied for both homogeneous and layered porous media. For layered media it is of interest to find an equivalent homogeneous medium and define ‘‘effective’’ hydraulic properties. In this paper a new solution for steady-state evaporation from coarse-textured porous media is presented. Based on this solution, the evaporation rate represents a macroscopic (column-scale) measure of unsaturated hydraulic conductivity at the pressure head equal to the maximum extent of the hydraulically connected region above the water table. The presented approach offers an alternative method for determination of unsaturated hydraulic conductivity of homogeneous coarse-textured …
Economic Analysis Of Greenhouse Lighting: Light Emitting Diodes Vs. Intensity Discharge Fixtures, Jacob A. Nelson, Bruce Bugbee
Economic Analysis Of Greenhouse Lighting: Light Emitting Diodes Vs. Intensity Discharge Fixtures, Jacob A. Nelson, Bruce Bugbee
Plants, Soils, and Climate Faculty Publications
Lighting technologies for plant growth are improving rapidly, providing numerous options for supplemental lighting in greenhouses. Here we report the photosynthetic (400-700 nm) photon efficiency and photon distribution pattern of two double-ended HPS fixtures, five mogul-base HPS fixtures, ten LED fixtures, three ceramic metal halide fixtures, and two fluorescent fixtures. The two most efficient LED and the two most efficient double-ended HPS fixtures had nearly identical efficiencies at 1.66 to 1.70 micromoles per joule. These four fixtures represent a dramatic improvement over the 1.02 micromoles per joule efficiency of the mogul-base HPS fixtures that are in common use. The best …
Association Mapping Of Agronomic Qtls In U.S. Spring Barley Breeding Germplasm, D. Pauli, G. J. Muehlbauer, K. P. Smith, B. Cooper, David Hole
Association Mapping Of Agronomic Qtls In U.S. Spring Barley Breeding Germplasm, D. Pauli, G. J. Muehlbauer, K. P. Smith, B. Cooper, David Hole
Plants, Soils, and Climate Faculty Publications
The use of genome-wide association studies (GWAS) to detect quantitative trait loci (QTL) controlling complex traits has become a popular approach for studying key traits in crop plants. The goal of this study was to identify the genomic regions of barley (Hordeum vulgare L.) that impact five agronomic and one quality trait in U.S. elite barley breeding lines, as well as to identify markers tightly linked with these loci for further use in barley improvement. Advanced recombinant inbred lines submitted to the U.S. Barley Coordinated Agricultural Project (CAP) were genotyped using a platform of 3072 single nucleotide polymorphism (SNP) markers …
Variability In Salt Tolerance Of Sorghum Bicolor L., Youping Sun, Genhua Niu, Pedro Osuna, Lijuan Zhao, Girisha Ganjehunte, Gary Peterson, Jose R. Peralta-Videa, Jorge L. Gardea-Torresdey
Variability In Salt Tolerance Of Sorghum Bicolor L., Youping Sun, Genhua Niu, Pedro Osuna, Lijuan Zhao, Girisha Ganjehunte, Gary Peterson, Jose R. Peralta-Videa, Jorge L. Gardea-Torresdey
Plants, Soils, and Climate Faculty Publications
Salt tolerance of ten sorghum (Sorghum bicolor L. Moench) varieties (‘1790E’, ‘BTx642’, ‘Desert Maize’, ‘Macia’, ‘RTx430’, ‘Schrock’, ‘Shallu’, ‘Tx2783’, ‘Tx7078’, and ‘Wheatland’) was evaluated in two greenhouse experiments. In the first experiment, sorghum were sown in substrates moistened with either nutrient solution (no addition of salts, control) at electrical conductivity (EC) of 1.2 dS·m-1 or salt solution at EC 5, 10 or 17 dS·m-1. Seedling emergence percentage decreased in all varieties only at EC of 17 dS·m-1 compared to the control. Seedling emergence percentage of sorghum ‘Macia’ and ‘1790E’ irrigated with salt solution at EC of 17 dS·m-1 decreased by …