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Dr. Jabro joined his USDA colleagues in Sidney, MT in February, 2005. His general research goals include: environmental soil physics and management, irrigation management and water quality.

His specific research goals will address the following interrelated areas: 1) development and evaluation of diversified center pivot irrigated cropping systems that enhance nitrogen and water use efficiencies, and improve soil and water quality; 2) development and evaluation of soil and water management practices that reduce soil compaction and improve soil and water quality by reducing erosion and agricultural chemical losses to ground and surface waters; and, 3) development of databases that can be used to adapt and/or evaluate suitable soil-water-plant models. These research areas will be investigated independently and collaboratively with other NPARL scientists.
 

Dr. Jabro has made significant contributions as a researcher and teacher in the soils, computer modeling, and statistics/math areas. His career was launched at the Pennsylvania State University’s Department of Crops and Soil Sciences and The Environmental Research Resources Institute where he served as an Associate/Assistant Professor (1988-1999) and project leader or integral member on numerous interdisciplinary grants research projects. His research projects and publications focused on water flow under saturated and unsaturated conditions, nitrate transport and leaching, assessing spatial and temporal variability of soil physical and hydraulic properties, and evaluation of non-point source pollution models under various soils, crops and weather conditions during this time.

In 2000, Dr. Jabro accepted a position as a soil scientist with the USDA-ARS in Prosser, Washington (1/00-9/02), where he focused on honing his research expertise in the areas of nitrogen management, irrigation monitoring, water quality, and soil moisture sensors technology under potato cropping system.  Additionally, Dr. Jabro managed the experimental site for which he earned the appreciation award. 

In 2002, Dr. Jabro served as a Research Associate at the Irrigated Agriculture Research and Extension Center at WSU-Prosser, where he conducted research and wrote grants in the areas of irrigation practices, water quality, and soil moisture sensors technology under various cropping systems.  He also taught chemistry at the local community college and was involved in various environmentally-oriented community events.

In 2004, Jay joined the Pennsylvania Department of the Environmental Protection (PADEP) as a soil scientist. He evaluated site-specific soil conditions as they related to the feasibility and design of soil dependent sewage disposals systems and sprinkler and sub-drip irrigation systems.  Dr. Jabro has been privileged to share his knowledge with graduate and undergraduate students through graduate committee participation and instruction of numerous courses in soils, environmental sciences, statistics, and math, quantitative analysis, chemistry, and computer sciences at various universities.

• Jabro, J.D., B.G. Leib, and A.D. Jabro. 2005. Estimating Soil Water Content Using Site Specific Calibration of Capacitance Measurements from Sentex EnviorScan Systems. In press.  Applied Engineering in Agriculture.

• Leib, B.G., H.W. Caspari, P.K. Andrews, C.A. Redulla, J.D. Jabro, and D. Strausz. 2004. Fruit Yield and Quality of “Fuji” Apple Trees Managed by Deficit Irrigation and Partial Root zone Drying. Accepted. J. Am Soc. Hort. Science.

• Leib, B.G., J.D. Jabro and G.R. Matthews. 2003. Field Evaluation and Performance Comparison of Soil Moisture Sensors. Soil Science 168:396-408.

• Jabro, J.D., W.L. Stout, S.L. Fales, and R.H. Fox. 2001. SOIL-SOILN Simulations of Water Drainage and Nitrate-Nitrogen Transport from Soil Core Lysimeters. J. of Environ. Qual. 30:584-589.

• Davenport, J.R., and J.D. Jabro. 2001. Assessment of Hand Held Ion Selective Electrode Technology for Direct Measurement of Soil Chemical Properties. J. Comm. Soil and Plant Sci. Analysis, 32(19&20), 3077-3085.

• Fox, R.H., Zhu, Y., Toth, J.D., Jemison, J.M. Jr., and Jabro, J.D. 2001. Nitrogen Fertilizer Rate and Crop Management Effects on Nitrate Leaching from an Agricultural Field in Central Pennsylvania. In Optimizing Nitrogen Management in Food and Energy Production and Environmental Protection: Proceedings of the 2nd International Nitrogen Conference on Science and Policy. The Scientific World Vol. 1. 

• Jabro, J.D., W.S. Brown, A.D. Jabro, and R.H. Fox. 1999. SOIL-SOILN Simulations Accuracy for Water Drainage and Nitrate-N losses under Corn.  Advances in Environmental Research J. l 2: 447-455.

• Jabro, J.D., J.D. Toth, and R.H. Fox. 1998. Evaluation and Comparison of Five Simulation Models for Estimating Water Drainage Fluxes under Corn. J. of Environ Qual. 27:1376-1381.

• Jabro, J.D., W.L. Stout, S.L. Fales, and R.H. Fox. 1998. Evaluation of NCSWAP Model using Nitrate Leaching Data from Soil Core Lysimeters under Orchardgrass. J. of Environ. Qual. 27:390-394.

• Day, R.L., M.A. Calmon, J.M. Stiteler, J.D. Jabro and R.L. Cunningham. 1998. Water Balance and Flow Patterns in a Fragipan using In-situ Soil Block. Soil Science 163:517-528.

• Jabro, J.D., W.L. Stout, S.L. Fales, and R.H. Fox. 1997. Nitrate Leaching from Soil Core Lysimeters Treated with Urine or Feces Under Orchardgrass: Measurement and Simulation. Journal of Environ. Qual. 26:89-94.

• Mohtar, R., J.D. Jabro, and D. Buckmaster. 1997. Field Testing of the Grazing Simulation Model, GRASIM. Transactions of the ASAE 40(5):1495-1500.

• Jabro, J.D. 1996. Variability of Field-Saturated Hydraulic Conductivity in a Hagerstown Soil as Affected by Initial Water Content. Soil Science 161:735-739.

• Dou, Z., J.D. Toth, J.D. Jabro, R.H. Fox, and D.D. Fritton. 1996. Soil Nitrogen Mineralization during Laboratory Incubation: Dynamics and Model Fitting. Soil Biology and Biochemistry Journal 28:625-632.

• Jabro, J.D., J.D. Toth, Z. Dou, R.H. Fox, and D.D. Fritton. 1995. Evaluation of Nitrogen Version of LEACHM for Predicting Nitrate Leaching. Soil Science 160:209-217.

• Jabro, J.D., J.M. Jemison, Jr., R.H. Fox, and D.D. Fritton. 1994. Predicting Bromide Leaching under Field Conditions using SLIM and MACRO. Soil Science 157:215-223.

• Jabro, J.D., E.G. Lotse, D.D. Fritton and D.E. Baker. 1994. Estimation of Preferential Movement of Bromide under Field Conditions. Journal of Hydrology 156:61-71.

• Jemison, J.M. Jr., J.D. Jabro, and R.H. Fox. 1994. Evaluation of LEACHM: I. Simulation of Drainage, Bromide Leaching, and Corn Bromide Uptake. Agronomy Journal 86:843-851.

• Jemison, J.M. Jr., J.D. Jabro, and R.H. Fox. 1994. Evaluation of LEACHM: II. Simulation of Nitrate Leaching from Nitrogen Fertilized and Manured Corn. Agronomy Journal 86:852-859.

• Jabro, J.D. 1992. Estimation of Saturated Hydraulic conductivity of Soils from Particle Size Distribution and Bulk Density Data. Transactions of the ASAE 35(2):557-560.

• Lotse, E.G., J.D. Jabro, K.E. Simmons, and D.E. Baker. 1992. Simulation of Nitrogen Dynamics and Leaching from Arable Soils. J. of Contaminant Hydrology 10(3):183-196.

• Jabro, J.D., E.G. Lotse, K.E. Simmons, and D.E. Baker. 1991. A Field Study of Macropore Flow under Saturated Conditions using a Bromide Tracer. Soil and Water Conservation J. 46(5):376-380.

• Jabro, J.D., D.D. Fritton, and R.R. Dobos. 1991. Spatial Variability of Field-Saturated Hydraulic Conductivity in Four Central Pennsylvania Soils. Trends in Soil Science 1:253-269.

• Grant, S.A., J.D. Jabro, D.E. Baker, and D.D. Fritton. 1991. A Stochastic Model of Infiltration into Soil which Simulated 'Macropore' Soil-Water Flow. Water Resour. Res. J. 27(7):1439-1446.

• Jabro, J.D. and D.D. Fritton. 1990. Simulation of Water Flow from a Percolation Test Hole in Layered Soil. Soil Sci. Soc. Am. J. 54:1214-1218.

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