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Marco Bittelli

Soil water content has an important impact on many fundamental biophysical processes. It affects the germination of seeds, plant growth and nutrition, microbial decomposition of the soil organic matter, nutrient transformations in the root zone, as

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Clinton C. Shock and Feng-Xin Wang

. Plant water stress can be measured either by the negative water potential in plant tissues or by the incremental heating of the crop canopy resulting from water stress. Other irrigation scheduling options rely on the measurement of soil water content or

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Sarah E. Cathey, Jason K. Kruse, Thomas R. Sinclair, and Michael D. Dukes

quality was also tracked to establish an understanding of the relationship between soil water status and canopy aesthetics. Plant-available water, a subset of total soil water, has been correlated with a number of plant responses from leaf expansion to

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Travis Culpepper, Joseph Young, David T. Montague, Dana Sullivan, and Benjamin Wherley

provided by turfgrasses capable of maintaining green cover, photosynthetic production, and reduced canopy temperatures under combined heat and soil water deficit resulting from summertime landscape irrigation restrictions. Physiological adaptation and

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Cheryl A. Parris, Clinton C. Shock, and Michael Qian

harvest yields increased to 15.25 Mg·ha −1 ·(3 yr) −1 . Several irrigation monitoring methods are available to growers when managing crop production including pan evaporation (PE), reference evapotranspiration (ET o ), or soil water measurements. Soil

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Lusheng Zeng, Jiayang Liu, Robert N. Carrow, Paul L. Raymer, and Qingguo Huang

Soil water repellency (SWR) is a condition in which a soil does not spontaneously wet when a drop of water is applied to the surface, indicating that the soil is hydrophobic ( Müller and Deurer, 2011 ). In recent years there has been greater

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Salvatore S. Mangiafico, Julie Newman, Donald J. Merhaut, Jay Gan, Ben Faber, and Laosheng Wu

compacted soil, weed cloth, or gravel. Given these considerations, soil water samples extracted with suction lysimeters from below the root zone may serve as indicators of solute concentrations in leachate, but should be interpreted cautiously, especially

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Sanjit K. Deb, Manoj K. Shukla, and John G. Mexal

Irrigation application in orchards should be timed so that tree water status is maintained at a level sufficient for optimum production. Irrigation scheduling decisions based on plant responses rather than measurements of soil water status have

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James M. White

`Orlando Gold' carrots (Daucus carota L.) were grown in plastic containers filled with an organic soil and placed in a greenhouse in the fall and spring. Three (high, medium, and low) soil water concentrations of 48% (low), 54% (medium), and 60% (high) were used. The number of marketable roots was higher following the fall than the spring planting. The high and low soil water concentrations significantly reduced the number of marketable roots over the medium concentration, but only the high concentration reduced the total marketable weight in both plantings. Application of the high soil water concentration reduced root length but not width measured at 2.5 cm below the crown relative to the medium and low soil water concentrations. Carrots will produce marketable roots when grown in a wide range of soil water concentrations, but the high concentration reduced yield more than the low concentration.

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Michael J. Costello

–water relations. Celette et al. (2005) , working in a nonirrigated vineyard in Languedoc-Roussillon, France, found that soil water content with a tall fescue ( Festuca arundinacea Shreb.) cover crop was higher at a depth of 0.75 m from spring to midsummer, but