1 Cornell, "Starter phosphorus fertilizer for corn"
2 Busan Metropolitan City Agricultural Technology Center, "Soil testing laboratory"
3 Westerman RL, "Soil Testing and Plant Analysis" 691-740, 1990
4 Gil SG, "Reduction of Chemical fertilizer usage for environmentally-friendly agriculture" 4 : 29-35, 2000
5 Brown JR, "Recommended chemical soil test procedures for the north central region"
6 NIAST, "Methods of soil chemical analysis"
7 Kweon G, "Comparison of Soil Phosphorus Measurements" 58 (58): 405-414, 2015
8 Hyun HN, "Comparison of Precision for Available Phosphate Measurement between Lancaster and Soiltek® KA-1 Spectrophotometric Method" 32 (32): 268-273, 1999
9 Hurtado MD, "Automated modification of the molybdenum blue colorimetric method for phosphorus determination in soil extracts" 36 (36): 1641-1659, 2008
10 Artigas J, "Application of ion-selective field effect transistor based sensors to soil analysis" 31 (31): 281-293, 2001
1 Cornell, "Starter phosphorus fertilizer for corn"
2 Busan Metropolitan City Agricultural Technology Center, "Soil testing laboratory"
3 Westerman RL, "Soil Testing and Plant Analysis" 691-740, 1990
4 Gil SG, "Reduction of Chemical fertilizer usage for environmentally-friendly agriculture" 4 : 29-35, 2000
5 Brown JR, "Recommended chemical soil test procedures for the north central region"
6 NIAST, "Methods of soil chemical analysis"
7 Kweon G, "Comparison of Soil Phosphorus Measurements" 58 (58): 405-414, 2015
8 Hyun HN, "Comparison of Precision for Available Phosphate Measurement between Lancaster and Soiltek® KA-1 Spectrophotometric Method" 32 (32): 268-273, 1999
9 Hurtado MD, "Automated modification of the molybdenum blue colorimetric method for phosphorus determination in soil extracts" 36 (36): 1641-1659, 2008
10 Artigas J, "Application of ion-selective field effect transistor based sensors to soil analysis" 31 (31): 281-293, 2001
11 Larsen S, "Ageing of Phosphate Added to Soil" 22 (22): 5-7, 1971
12 Murphy J, "A modified singlesolution method for determination of phosphate in natural waters" 27 : 31-36, 1962