341 Plant Analytical Tests This test determines the dry matter in a compost or manure sample. Partial DM (dried at 55°C). |
147 Soil Analytical Test Sand/Silt/Clay. This is a physical property test. This method quantitatively determines the physical proportions of three sizes of primary soil particles as determined by their settling rates in an aqueous solution using a hydrometer. These portions are used to determine the soil type. The method has a detection limit of 2.0% sand, silt and clay and is generally reproducible to within ± 8%. |
136 Soil Analytical Test pH (in 1:2 soil:water). This method determines the pH of soil using a pH meter. It is most accurate for soils with a pH between 4.0 to 9.0. This method provides values of the disassociated H-ions contacting the electrode. The method is generally reproducible within 0.2 pH units. |
223 Water Analytical Tests pH. This method quantifies water pH and is a measure of the relative acidity or alkalinity of the solution that is in equilibrium. It is a measure of the intensity of acidity or alkalinity, but does not indicate the relative buffering capacity of water. pH is measured to access irrigation water chemical properties, crop and soil suitability. The method is generally reproducible within ± 0.05 pH units. |
342 Plant Analytical Tests This test determines the pH and electrical conductivity of a compost or manure sample. pH (water 1:5), EC (Water 1:5). |
202 Water Analytical Tests Specify Buffer. This method determines the pH of water using a pH electrode. Values are reported to the nearest 0.10 pH unit. |
124 Uncategorized Bray-P. This is a soil fertlity test. This procedure estimates the availability of phosphate in soils with acidic to neutral pH, using a dilute acid solution of hydrochloric acid containing ammonium fluoride. The method is shown to be well correlated to crop response on neutral to acid soils. The method has a detection limit of approximately 0.5 mg/kg and is generally reproducible within 8%. |
125 Soil Analytical Test Olsen-P. This is a soil fertility test. This procedure estimates the availability of phosphate in soils with neutral to alkaline pH. It is based on the extraction of phosphate from the soil by 0.5 N sodium bicarbonate solution adjusted to pH 8.5. The method has shown to be well correlated to crop response to phosphorus fertilization on neutral to alkaline soils. The method has a detection limit of 1.0 ppm. |
338 Plant Analytical Tests This method determines the concentration of phosphate-phosphorus in botanical materials. It is determined spectrophotometrically. The method detection limit is approximately 10 mg/kg (sample dry basis) and is generally reproducible to within ± 10.0%. PO4-P. |
153 Soil Analytical Test P. This is soil composition test by acid digest. This procedure analyzes the concentration of phosphorus by utilizing a nitric acid/hydrogen peroxide closed vessel microwave digestion. Determination is by Inductively Coupled Plasma Atomic Emission Spectrometry (ICP-AES). The approximate method detection limit is 1 mg/kg. |
224 Water Analytical Tests PO4-P (soluble P). This test determines the amount of phosphate phosphorus in water. The method has a detection limit of 0.05 mg/L. |
261 Water Analytical Tests P. This test method determines the concentration of phosphorus by utilizing an acid digestion and determination by Inductively Coupled Plasma Atomic Emission Spectrometry (ICP-AES). The method has detection limits ranging from 0.1 mg/Kg. The method is generally reproducible within 8%. |
327 Plant Analytical Tests This method quantitatively determines the concentration of phosphorus in botanical materials utilizing a nitric-perchloric acid digestion. Digest analyte concentrations are determined by atomic absorption spectrometry (AAS) and/or inductively coupled plasma atomic emission spectrometry (ICP-AES). The method detection limit is approximately 0.02%. P. |
Soil Quality Packages 68 pesticides - screening, including Hexachlorocyclohexanes and Dichlorodiphenyltrichloroethanes |
137 Soil Analytical Test K. This is a soil fertility test. This method quantitatively determines the amount of available potassium in the soil saturation paste extract using atomic absorption spectrometry (AAS) or Inductively Coupled Plasma Emission Spectrometry (ICP-AES). The method detection limit is approximately 25 mg/kg on a solution basis and it is generally reproducible within ± 7%. |
238 Water Analytical Tests K. This test method determines the concentration of potassium in a water sample by Inductively Coupled Plasma Atomic Emission Spectrometry (ICP-AES).The method has a detection limit of 0.05 mg/L. |
262 Water Analytical Tests K. This test method determines the concentration of potassium by utilizing an acid digestion and determination by atomic absorption spectrometry (AAS). The method has detection limits ranging from 0.1 mg/Kg. The method is generally reproducible within 8%. |
328 Plant Analytical Tests This method quantitatively determines the concentration of potassium in botanical materials utilizing a nitric-perchloric acid digestion. Digest analyte concentrations are determined by atomic absorption spectrometry (AAS) and/or inductively coupled plasma atomic emission spectrometry (ICP-AES). The method detection limit is approximately 0.02%. K. |
339 Plant Analytical Tests This method determines the concentration of potassium in botanical materials. It is determined by AES or AAS. The method detection limit is approximately 10 mg/kg (sample dry basis) and is generally reproducible to within ± 10.0%. K. |
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