Soil Concentration – Leppington Pastoral Company

As per our licence requirements we test the soils on our farm at three different points and at two different depths.

We have a yearly test at 0-10cm. These samples are collected from the slope, ridge and flat area. As tests become available please look here for the results.

Monitoring Point 3 – 0-10cm Soil Test (Sample date 29/9/2023)

Pollutant	Unit of Measure	# Samples	Lowest Value	Mean	Highest Value
Bray Phosphorus	milligrams per kilogram	3	240	280	340
Cation Exchange Capacity	milliequivale nts per litre	3	15.7	18.73	20.8
Conductivity	deciSiemens per metre	3	0.43	0.49	0.54
Exchangeable sodium Percentage	percent	3	9	10.1	12
Nitrate	milligrams per kilogram	3	6.7	31.9	45
Organic Carbon	percent by weight	3	0.9	1.06	1.3
pH	pH	3	8.3	8.53	8.9
Phosphorus Sorption Capacity	milligrams per kilogram	3	120	160	180
TN	percent by weight	3	0.10	0.12	0.16

Monitoring Point 3 – 0-10cm Soil Test (Sample date 21/3/2022)

Pollutant	Unit of Measure	# Samples	Lowest Value	Mean	Highest Value
Bray Phosphorus	milligrams per kilogram	3	240	333	430
Cation Exchange Capacity	milliequivale nts per litre	3	21.9	24.96	27.3
Conductivity	deciSiemens per metre	3	0.37	0.52	0.69
Exchangeable sodium Percentage	percent	3	5.8	8.76	14
Nitrate	milligrams per kilogram	3	5	15.83	34
Organic Carbon	percent by weight	3	1.2	1.9	2.6
pH	pH	3	8.5	8.6	8.7
Phosphorus Sorption Capacity	milligrams per kilogram	3	240	310	350
TN	percent by weight	3	0.17	0.25	0.33

Monitoring Point 3 – 0-10cm Soil Test (Sample date 02/3/2021)

Pollutant	Unit of Measure	# Samples	Lowest Value	Mean	Highest Value
Bray Phosphorus	milligrams per kilogram	3	400	423	470
Cation Exchange Capacity	milliequivale nts per litre	3	24.5	24.9	25.7
Conductivity	deciSiemens per metre	3	0.51	0.56	0.57
Exchangeable sodium Percentage	percent	3	8.3	8.9	0.97
Nitrate	milligrams per kilogram	3	8.4	17.8	28.0
Organic Carbon	percent by weight	3	1.8	2.1	2.4
pH	pH	3	8.8	8.9	9.1
Phosphorus Sorption Capacity	milligrams per kilogram	3	290	313	330
TN	percent by weight	3	0.23	0.27	0.30

Monitoring Point 3 – 0-10cm Soil Test (Sample date 17/3/2020)

Pollutant	Unit of Measure	# Samples	Lowest Value	Mean	Highest Value
Bray Phosphorus	milligrams per kilogram	3	390	433	500
Cation Exchange Capacity	milliequivale nts per litre	3	24.9	26.3	27.2
Conductivity	deciSiemens per metre	3	0.56	0.6	0.7
Exchangeable sodium Percentage	percent	3	9.9	11	13
Nitrate	milligrams per kilogram	3	10	11.7	15
Organic Carbon	percent by weight	3	1.7	1.77	1.9
pH	pH	3	8.6	8.9	9.3
Phosphorus Sorption Capacity	milligrams per kilogram	3	230	240	260
TN	percent by weight	3	0.22	0.24	0.27

Monitoring Point 3 – 0-10cm Soil Test (Sample date 02/4/19)

Pollutant	Unit of Measure	# Samples	Lowest Value	Mean	Highest Value
Bray Phosphorus	milligrams per kilogram	3	380	430	460
Cation Exchange Capacity	milliequivale nts per litre	3	25.20	27.66	29.7
Conductivity	deciSiemens per metre	3	0.67	0.83	1.03
Exchangeable sodium Percentage	percent	3	9.70	10.9	13.0
Nitrate	milligrams per kilogram	3	3.0	15.0	36.0
Organic Carbon	percent by weight	3	1.8	2.06	2.3
pH	pH	3	8.6	8.8	9.1
Phosphorus Sorption Capacity	milligrams per kilogram	3	260	336.6	450
TN	percent by weight	3	0.24	0.27	0.290

Monitoring Point 3 – 0-10cm Soil Test (Sample date 15/6/18)

Pollutant	Unit of Measure	# Samples	Lowest Value	Mean	Highest Value
Bray Phosphorus	milligrams per kilogram	3	190	327	450
Cation Exchange Capacity	milliequivale nts per litre	3	22.5	23.1	24.0
Conductivity	deciSiemens per metre	3	0.62	0.667	0.73
Exchangeable sodium Percentage	percent	3	7.7	8.5	9.9
Nitrate	milligrams per kilogram	3	50	71.667	88
Organic Carbon	percent by weight	3	1.7	1.967	2.1
pH	pH	3	8.3	8.65	9.0
Phosphorus Sorption Capacity	milligrams per kilogram	3	180	230	290
TN	percent by weight	3	0.25	0.283	0.330

Monitoring Point 3 – 0-10cm Soil Test (Sample date 9/5/17)

Pollutant	Unit of Measure	# Samples	Lowest Value	Mean	Highest Value
Bray Phosphorus	milligrams per kilogram	3	470	547	590
Cation Exchange Capacity	milliequivale nts per litre	3	24.2	25.0	25.6
Conductivity	deciSiemens per metre	3	0.58	0.63	0.69
Exchangeable sodium Percentage	percent	3	8.6	8.8	9.2
Nitrate	milligrams per kilogram	3	17	28	37
Organic Carbon	percent by weight	3	2	2.2	2.4
pH	pH	3	8.3	8.4	8.7
Phosphorus Sorption Capacity	milligrams per kilogram	3	230	250	280
TN	percent by weight	3	0.26	0.29	0.31

Monitoring Point 3 – 0-10cm Soil Test (Sample date 29/3/16)

Pollutant	Unit of Measure	# Samples	Lowest Value	Mean	Highest Value
Bray Phosphorus	milligrams per kilogram	3	210	246.6	290
Cation Exchange Capacity	milliequivale nts per litre	3	24.2	26.0	28.3
Conductivity	deciSiemens per metre	3	0.76	0.83	0.90
Exchangeable sodium Percentage	percent	3	9.0	10.2	12.0
Nitrate	milligrams per kilogram	3	71.0	87.6	110.0
Organic Carbon	percent by weight	3	2.2	2.2	2.4
pH	pH	3	8.0	8.2	8.5
Phosphorus Sorption Capacity	milligrams per kilogram	3	210	236.6	260
TN	percent by weight	3	0.24	0.25	0.27

Monitoring Point 3 – 0-10cm Soil Test (Sample date 10/6/15)

Pollutant	Unit of Measure	# Samples	Lowest Value	Mean	Highest Value
Bray Phosphorus	milligrams per kilogram	3	260	310	340
Cation Exchange Capacity	milliequivale nts per litre	3	23.5	26.5	30
Conductivity	deciSiemens per metre	3	0.47	0.517	0.55
Exchangeable sodium Percentage	percent	3	5.5	6.233	6.7
Nitrate	milligrams per kilogram	3	23	49.333	83
Organic Carbon	percent by weight	3	2	2.433	2.9
pH	pH	3	8.5	8.55	8.6
Phosphorus Sorption Capacity	milligrams per kilogram	3	160	180	190
TN	percent by weight	3	0.27	0.327	0.390

Monitoring Point 3 – 0-10cm Soil Test (Sample date 27/3/14)

Pollutant	Unit of Measure	# Samples	Lowest Value	Mean	Highest Value
Bray Phosphorus	milligrams per kilogram	3	180	233.33	280
Cation Exchange Capacity	milliequivale nts per litre	3	18.5	21.13	23.6
Conductivity	deciSiemens per metre	3	0.45	0.55	0.69
Exchangeable sodium Percentage	percent	3	8	10	11
Nitrate	milligrams per kilogram	3	29.	52.66	80
Organic Carbon	percent by weight	3	1.4	1.96	2.3
pH	pH	3	8.2	8.5	8.7
Phosphorus Sorption Capacity	milligrams per kilogram	3	170	210	270
TN	percent by weight	3	0.18	0.257	0.31

We have another tests that occurs every two years at 40-70cm. These samples a collected from the slope, ridge and flat area.. As tests become available please look here for the results.

Monitoring Point 4 – 40-70cm Soil Test (Sample date 29/09/23)

Pollutant	Unit of Measure	# Samples	Lowest Value	Mean	Highest Value
Bray Phosphorus	milligrams per kilogram	3	3	3	3
Conductivity	deciSiemens per metre	3	0.57	0.79	1.11
Nitrate	milligrams per kilogram	3	0.9	2.6	3.6
pH	pH	3	6.2	7.3	8.1

Monitoring Point 4 – 40-70cm Soil Test (Sample date 21/03/22)

Pollutant	Unit of Measure	# Samples	Lowest Value	Mean	Highest Value
Bray Phosphorus	milligrams per kilogram	3	3	9.33	21
Conductivity	deciSiemens per metre	3	0.59	0.74	0.97
Nitrate	milligrams per kilogram	3	0.5	3.53	8.9
pH	pH	3	6.3	7.6	8.3

Monitoring Point 4 – 40-70cm Soil Test (Sample date 17/03/20)

Pollutant	Unit of Measure	# Samples	Lowest Value	Mean	Highest Value
Bray Phosphorus	milligrams per kilogram	3	3	26.33	42
Conductivity	deciSiemens per metre	3	0.59	0.737	0.82
Nitrate	milligrams per kilogram	3	2.0	8.0	15
pH	pH	3	6.4	6.7	7.4

Monitoring Point 4 – 40-70cm Soil Test (Sample date 15/6/18)

Pollutant	Unit of Measure	# Samples	Lowest Value	Mean	Highest Value
Bray Phosphorus	milligrams per kilogram	3	3	13.33	24
Conductivity	deciSiemens per metre	3	0.93	1.027	1.17
Nitrate	milligrams per kilogram	3	13	34.33	60
pH	pH	3	7.7	7.9	8.0

Monitoring Point 4 – 40-70cm Soil Test (Sample date 29/3/16)

Pollutant	Unit of Measure	# Samples	Lowest Value	Mean	Highest Value
Bray Phosphorus	milligrams per kilogram	3	4.0	13.6	26
Conductivity	deciSiemens per metre	3	0.63	0.96	1.24
Nitrate	milligrams per kilogram	3	4	10.6	24.0
pH	pH	3	7.8	7.86	7.9

Monitoring Point 4 – 40-70cm Soil Test (Sample date 27/3/14)

Pollutant	Unit of Measure	# Samples	Lowest Value	Mean	Highest Value
Bray Phosphorus	milligrams per kilogram	3	5	14.66	27
Conductivity	deciSiemens per metre	3	0.50	0.67	0.8
Nitrate	milligrams per kilogram	3	9.8	25.26	40
pH	pH	3	7.7	8.0	8.4