1 "Use of the nitrate specific ion electrode in soil testing" 73-84, 1971
2 "University of Missouri Department of Agronomy" 1983
3 "The rapid determination of nitrate at low concentrations in soil extracts comparison of ion selective electrode with continuous-flow analysis" 1437-1451, 1984
4 "Testing soils for potassium" 1990181-221
5 "Soil Sci" 17 (17): 1311-1329, 1986
6 "Sensors for site-specific management. In: The State of Site-Specific Management for Agriculture" Madison, Wisc.: ASA-CSSA-SSSA. 183-210, 1997
7 "Selmer-Olsen" 1969 analyst 94 : 888-894, r
8 "Selectivity of membrane electrodes based on derivatives of dibenzyltin dichloride" 754-759, 1991
9 "Recommended Chemical Soil Test Procedures for the North Central Region" Missouri Agricultural Experiment Station, Univ. of Missouri. 1998
10 "Potential uses of ion-selective potassium electrodes in soil fertility management" 34 : 2699-2726, 2003
1 "Use of the nitrate specific ion electrode in soil testing" 73-84, 1971
2 "University of Missouri Department of Agronomy" 1983
3 "The rapid determination of nitrate at low concentrations in soil extracts comparison of ion selective electrode with continuous-flow analysis" 1437-1451, 1984
4 "Testing soils for potassium" 1990181-221
5 "Soil Sci" 17 (17): 1311-1329, 1986
6 "Sensors for site-specific management. In: The State of Site-Specific Management for Agriculture" Madison, Wisc.: ASA-CSSA-SSSA. 183-210, 1997
7 "Selmer-Olsen" 1969 analyst 94 : 888-894, r
8 "Selectivity of membrane electrodes based on derivatives of dibenzyltin dichloride" 754-759, 1991
9 "Recommended Chemical Soil Test Procedures for the North Central Region" Missouri Agricultural Experiment Station, Univ. of Missouri. 1998
10 "Potential uses of ion-selective potassium electrodes in soil fertility management" 34 : 2699-2726, 2003
11 "Particle-size analysis. In: Methods of soil analysis: Part 4 - Physical methods, ed(s)." Madison, Wisc: SSSA. 255-293, 2002
12 "On-the-go soil sensors for precision agriculture" 44 : 71-91, 2004
13 "Nitrate determination in an oxisol using K2SO4 extraction and the nitrate specific electrode" 207-211, 1978
14 "New nitrate ion-selective electrodes based quaternary ammonium compounds in nonporous polymer membranes" 1-85 16, 1976
15 "Membrane selection and ISFET configuration evaluation for soil nitrate sensing" 43 (43): 197-206, 2000
16 "Long-life multiple-ISFETs with polymeric gates" 3 329-4 336, 1989
17 "Ion-selective electrode determinations of exchangeable potassium in soils" 594-598, 1987
18 "Flow injection analysis of environmental samples for nitrate using an ion-selective electrode" 705-102 713, 1977
19 "Feasibility of on-the-go mapping of soil nitrate and potassium using ion-selective electrodes." 2002
20 "Extraction of potassium and sodium from acid and calcareous soils with the Kelowna multiple element extractant" 235-242, 1989
21 "Evaluation of nitrate and potassium ion-selective membranes for soil macronutrient sensing" 49 (49): 597-606, 2006
22 "Determination of available phosphorus in acid and calcareous soils with the Kelowna multiple-element extractant" 284-291, 1988
23 "Design of a calcium-selective optode membrane based on neutral ionophore" 738-742, 1990
24 "Cyclic polyamine ionophores for use in a dibasic-phosphate-selective electrode" 3587-3591, 1994
25 "Correlations between soil nitrate concentrations in late spring and corn yields in Iowa" 103-109, 1989
26 "Application of ion selective field effect transistor based sensors to soil analysis" 31 (31): 281-293, 2001
27 "A modification of Mehlich II extractant" 1409-1416, 1984
28 "A flow-injection electronic tongue based on potentiometric sensors for the determination of nitrate in the presence of chloride." 72-80, 2004