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Evaluation of Normalized Root Length Density Distribution Models

Field Crops Research, 2019
Abstract The root length density (RLD) distribution is an essential parameter for modeling crop growth and root uptake in soil–plant systems, but it is difficult to measure under field conditions. Several RLD models contain many parameters that vary with the crop growth season and they are difficult to measure, and thus they have limited ...
Songrui Ning
exaly   +3 more sources

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Kiwifruit root systems 1. Root‐length densities

New Zealand Journal of Crop and Horticultural Science, 1988
Abstract Root‐length densities (RLD; root length per unit volume of soil) were measured in core samples taken from nine North Island kiwifruit orchards. Despite differences in vine spacings, root‐stock ages and types, soils, climates, and management, there was a consistent pattern to root systems.
P. W. Gandar, K. A. Hughes
openaire   +1 more source

Distribution of Roots and Root Length Density in a Maize/Soybean Strip Intercropping System

Agricultural Water Management, 2010
Abstract In a field experiment in the Yellow River Basin conducted in 2007 and 2008, it was found that, under full irrigation, the roots of maize not only penetrated deeper than those of soybean but also extended into soybean stands underneath the space between inner rows of soybean.
Aiwang Duan, Jingsheng Sun, Zugui Liu
exaly   +2 more sources

Root Length Density from Minirhizotron Observations

Agronomy Journal, 1988
AbstractRoot length density (L; cm root/cm3 soil) measurements are important for developing and testing many water extraction equations. Clear tubes buried in the soil (minirhizotrons) allow continuous and nondestructive observations of rooting that may be used to estimate L. In a field experiment, counts of roots at the walls of horizontally installed
William A. Bland, William A. Dugas
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Soil Core and Minirhizotron Comparison for the Determination of Root Length Density

Plant and Soil, 1994
Detailed knowledge of the distribution of roots in the soil is important in understanding the extraction of water and nutrients from soil. Various techniques have been developed to monitor root-length density under field conditions. Excavation techniques, including soil cores, have long been considered to give reliable estimates of root-length density,
Thomas R Sinclair, Benjamin K Samson
exaly   +2 more sources

Predicting Root Length Density in Stream Banks

2005 Tampa, FL July 17-20, 2005, 2005
Roots from riparian vegetation increase soil resistance to stream bank erosion; therefore, knowledge of root density and distribution in stream banks is useful in describing the resistance of stream banks to erosion. The objective of this study was to develop empirical models to predict stream bank root density in three size classes: very fine, fine,
null Candice Piercy, null Theresa Wynn
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ESTIMATING ROOT LENGTH DENSITY AND BIOMASS IN ASPARAGUS

Acta Horticulturae, 2002
Soil type, crop management practices, annual plant growth patterns and seasonal changes in the soil environment all influence asparagus roots. This study describes the changes that occur in root growth over time in two contrasting soils and crop management systems.
D. Drost, D. Wilson
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Regulation of length and density of Arabidopsis root hairs by ammonium and nitrate

Journal of Plant Research, 2015
Root hairs expand the effective root surface to increase the uptake of nutrients and water from the soil. Here the local effects of the two major nitrogen sources, ammonium and nitrate, on root hairs were investigated using split plates. In three contrasting accessions of A. thaliana, namely Col-0, Tsu-0 and Sha, root hairs were differentially affected
Thomas, Vatter, Benjamin, Neuhäuser, Markus, Stetter, Uwe, Ludewig   +3 more
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Root-Length Densities of Various Annual Crops Following Crops With Contrasting Root Systems

Soil and Tillage Research, 2014
Abstract The aim of this study was to evaluate how soil structure and root-length densities of annual crops can be influenced by preceding crops. Three different annual field crops (spring wheat, Triticum aestivum L., winter barley, Hordeum vulgare L.
Ralf Pude, Miriam Athmann, Stephan Peth
exaly   +2 more sources

Converting Root Numbers Observed at Minirhizotrons to Equivalent Root Length Density

Soil Science Society of America Journal, 1994
Abstract Root length density (RLD) is the measure of plant root growth having greatest general utility. The use of clear material observation tubes, known as minirhizotrons (MR), in field soil has proved to be an effective method for measurement of root growth dynamics.
S. D. Merrill, D. R. Upchurch
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