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Soil salinity is a common problem in agricultural regions of the southwestern United States as a result of low rainfall, high evapotranspiration, and poor quality of irrigation water. High soil salinity leads to poor germination, delays stand

postcard displaying the fruits on a field of spineless cacti. The use of prickly pear as a forage crop began with the introduction of cattle to the New World by the Spanish to their territories in Mexico and the southwestern United States where Opuntia

in leaf anatomical structure ( Ojeda-Barrios et al., 2012 ). Pecan orchards affected by Zn deficiency are usually established in soils with low organic matter such as the alkaline, calcareous soils found in the southwestern United States and northern

United States. In these alkaline soils, Zn binds with hydroxyls and carbonates to form low-solubility compounds, making it less available to plants ( Udo et al., 1970 ). Lack of Zn availability frequently leads to Zn deficiency in desert-grown pecans

. Biotechnol. 82 257 265 Routson, K.J. Reilley, A.A. Henk, A.D. Volk, G.M. 2009 Identification of historic apple trees in the southwestern United States and implications for conservation HortScience 44 589 594 Tamura, K. Peterson, D. Peterson, N. Stecher, G

Safe application of reclaimed water reuse in the southwestern United States. University of California Division of Agriculture and Natural Resources Bul. 8357

, but have not been pursued for verticillium wilt ( Simko et al., 2014 ). The majority of U.S. iceberg lettuce is produced year round in the southwestern United States. In Coastal California, lettuce is harvested from April to October. Later in the year

good, chlorophyll indices from these trees may be considered to represent acceptable readings for established ‘Wichita’ pecan trees in the irrigated southwestern United States. In several other crops, a SPAD index reading of 50 to 52 represented

these species are native to North America and thrive in well-drained soils with full sun conditions in southwestern United States and northern Mexico ( Stubbendieck et al., 2003 ). Materials and Methods Greenhouse experiment. Seeds of selected

adjacent northern Mexico. Like many perennials native to southwestern United States, especially in New Mexico or Texas, most of the species aforementioned are considered drought tolerant ( Lady Bird Johnson Wildflower Center, 2015 ); however, their salt