Data set ID:
Plant and soil samples were collected from mequite dunes sites which had not been irrigated (control) or had been irrigated (treatment) with water. Soil samples were collected (hand augered) under mesquite (Prosopis glandulosa) trees to three depths, 0-50 and 50-100, and 100-150cm. Soil samples were placed in plastic bags, tied, and stored in portable coolers. Soil samples were analyzed for zinc , cupper, iron, and manganese. Plant tissue was analyzed for total nitrogen and total phosphorous. This study has been completed.
Field and instrumental data sheets
Five mesquite dunes were irrigated by pumping water from storage tank located 200 m from the site. Water was applied to the dunes with an overhead sprinkler (later replaced by a drip irrigation system to minimize wind drift) located at the apex of each dune. Irrigation began in March with approximately 2.5 cm applied 2-3 times/week for 6 weeks to initially wet the dry soil. Thereafter high water availability was maintained by weekly irrigation. Five nonirrigated dunes served as control. Soil samples were collected (hand augered) under mesquite (Prosopis glandulosa) trees at sand dune site on the Jornada LTER site to three depths, 0-50 and 50-100, and 100-150cm. Soil samples were placed in plastic bags, tied, and stored in portable coolers. Plant Nutrient analysis: Total N (and TP) was digested by Kjeldahl digestion block techniques (Bremner and Mulvaney, 1982). Digest NH4-N was analyzed using an automated salicylate procedure (Technicon Industrial Method No. 329-74W/B). Available P was analyzed as NaHCO3-extractable (PO4) P (Olsen and Sommers, 1982).
Soil cores were collected under mesquite (Prosopis glandulosa) trees at the dune site on the Jornada LTER site located in the northern Chihuahuan Desert near Las Cruces, New Mexico. Precipitation is 230mm/yr, with half occurring during the summer. The vegetation is coppice mesquite dunes (30% cover) with scattered shrubs of saltbush and snakeweed.
Sampling occurred seven times during the course of the study. This study is completed.