Search Results

You are looking at 51 - 60 of 1,240 items for :

  • All content x
Clear All
Free access

Qi Zhang and Kevin Rue

Salinity is a major limiting factor in turfgrass management in arid and semiarid regions ( Carrow and Duncan, 1998 ). Salinity inhibits turfgrass growth and development, resulting in poor turfgrass stands and reduced aesthetic and playable functions

Free access

Sanjit K. Deb, Parmodh Sharma, Manoj K. Shukla, Theodore W. Sammis, and Jamshid Ashigh

Salinity stress is an ever-present environmental constraint to crop productivity in arid and semiarid regions. The quality of irrigation water remains a primary factor influencing soil salinity. In the arid and semiarid southwestern United States

Free access

Carolina Aparicio, Miguel Urrestarazu, and María del Pilar Cordovilla

In the Mediterranean region, the olive is considered to be the most important fruit tree in the area ( International Olive Oil Council, 2003 ). In this region, olive tree cultivation is being extended to irrigated land where salinity is becoming a

Free access

Yun Kong and Youbin Zheng

can result in soil salinization ( Varlagas et al., 2010 ). One of the most important factors limiting the reuse of nutrient solutions for hydroponic production of common vegetables (e.g., cucumber, tomato, and pepper) is elevated salinity ( Van Os

Free access

James D. Oster, D.E. Stottlmyer, and M.L. Arpaia

California. For both the irrigation treatments, sufficient water was applied to maintain the soil water matric potential greater than −20 kPa at the 30-cm and 60-cm depths beneath the tree canopy. The salinities of saturated paste extracts (ECe) of soil

Free access

Sharon J.B. Knewtson, M.B. Kirkham, Rhonda R. Janke, Leigh W. Murray, and Edward E. Carey

and management of the experimental plots, we were able to investigate soil quality under high tunnels compared with adjacent fields under both conventional and organic management. Measures of soil quality were: pH, salinity, total soil C, and POM C

Free access

Maren E. Veatch-Blohm, Dorothy Chen, and Matthew Hassett

Salinity is a major problem affecting up to one-third or more of agricultural land worldwide with the affected amount expected to increase ( Carter et al., 2005 ; Cassaniti et al., 2009 ; Munns and Tester, 2008 ; Shibli et al., 2007 ). In

Full access

Brian J. Boman, Mongi Zekri, and Ed Stover

Although citrus (Citrus spp.) is sensitive to salinity, acceptable production can be achieved with moderate salinity levels, depending on the climate, scion cultivar, rootstock, and irrigation-fertilizer management. Irrigation scheduling is a key factor in managing salinity in areas with salinity problems. Increasing irrigation frequency and applying water in excess of the crop water requirement are recommended to leach the salts and minimize the salt concentration in the root zone. Overhead sprinkler irrigation should be avoided when using water containing high levels of salts because salt residues can accumulate on the foliage and cause serious injury. Much of the leaf and trunk damage associated with direct foliar uptake of salts can be reduced by using microirrigation systems. Frequent fertilization using low rates is recommended through fertigation or broadcast application of dry fertilizers. Nutrient sources should have a relatively low salt index and not contain chloride (Cl) or sodium (Na). In areas where Na accumulates in soils, application of calcium (Ca) sources (e.g., gypsum) has been found to reduce the deleterious effect of Na and improve plant growth under saline conditions. Adapting plants to saline environments and increasing salt tolerance through breeding and genetic manipulation is another important method for managing salinity.

Open access

Lakshmy Gopinath, Matthew Barton, and Justin Quetone Moss

The degradation of existing freshwater resources and variations in rainfall patterns are straining water resources needed for a growing population. Recycled irrigation water, although often high in salinity, is becoming a more prevalent solution for

Full access

Nydia Celis, Donald L. Suarez, Laosheng Wu, Rui Li, Mary Lu Arpaia, and Peggy Mauk

as the seventh largest producer at 0.175 million tons ( FAO, 2018 ). Avocado production in California (the major U.S. producer) is increasingly affected by the scarcity of freshwater and relies on more saline waters as well as salinization of existing