Hydroponics 4-Way Test KitSoil pH Test kit

Model STH Series – Combination Soil Testing Outfits


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SKU: LM5029 Categories: ,

Description

Order Code: LM5029

Applications: Soil Testing

This line of combination soil analysis outfits offers the finest visual color matching system available to today’s agronomist. Technically advanced reagent systems and unique extraction procedures based on the Mehlich I extraction provide fast, simple and extremely accurate soil testing.

The Model STH Combination Soil Outfits have offered simplified methods for determination of available nutrients found in agricultural soils for over forty years.

Since the original introduction of the STH series, based on Morgan soil test methods, reagent systems have been updated constantly with new advancements in modern chemistry. A series of rapid, accurate chemical tests use standardized reagents to produce color reactions measured against laminated color charts.

All STH outfits are furnished in lightweight carrying cases with components securely mounted in removable foam trays. This format provides flexibility for the in-house specialist who also wants to make quick problem determinations in the field.

Colorimetric test methods are used for most test factors. Tests for calcium, sulfate and chlorides are based on turbidity measurements. Potassium analysis also employs a turbidity measurement, using a unique reading device designed in LaMotte laboratories to read directly in pounds per acre. A single extraction procedure, using Morgan Universal Extraction Solution, provides the liquid soil extract for all the nutrient tests with the exception of chloride, which is extracted with demineralized water. The Humus Screening Test, performed on a soil sample-demineralized water suspension, employs five color standards for rapid measurement of humus content of the soil.

Soil pH is determined colorimetrically, using a series of pH indicators and color charts covering the range of pH 3.8 to 9.6. The STH outfits also include simplified procedures for screening nitrates, phosphorus, and potassium in plant tissues. Complete reagent refill packages are available for each STH outfit.

Each kit includes complete instructions, a soil management handbook and a pad of soil analysis report forms. The LaMotte Soil Handbook contains general information on interpretation of test results for determination of lime and fertilizer requirements.

Specifications

Model STH-4
Code 5029 		Model STH-5
Code 5007		 Model STH-7
Code 5061		 Model STH-14
Code 5010-01
pH
pH 3.8-9.6
100 Tests		 pH
pH 3.8-9.6
100 Tests		 pH
pH 3.8-9.6
100 Tests		 pH
pH 3.8-9.6
100 Tests
Nitrate Nitrogen
10-150 lbs/acre
50 Tests		 Nitrate Nitrogen
10-150 lbs/acre
50 Tests		 Nitrate Nitrogen
10-150 lbs/acre
50 Tests		 Nitrate Nitrogen
10-150 lbs/acre
50 Tests
Phosphorus**
10-200 lbs/acre
50 Tests		 Phosphorus**
10-200 lbs/acre
50 Tests		 Phosphorus**
10-200 lbs/acre
50 Tests		 Phosphorus**
10-200 lbs/acre
50 Tests
Potassium
100-400 lbs/acre
50 Tests		 Potassium
100-400 lbs/acre
50 Tests		 Potassium
100-400 lbs/acre
50 Tests		 Potassium
100-400 lbs/acre
50 Tests
Humus (Organic Matter)
L-H 1.5%-8%
50 Tests		 Humus (Organic Matter)
L-H 1.5%-8%
50 Tests		 Humus (Organic Matter)
L-H 1.5%-8%
50 Tests
Calcium
150-2800 ppm
50 Tests		 Calcium
150-2800 ppm
50 Tests
Magnesium
L-H 5-150 ppm
50 Tests		 Magnesium
L-H 5-150 ppm
50 Tests
Ammonia Nitrogen
L-H 5-150 ppm
50 Tests
Manganese
L-H 4-40 ppm
50 Tests
Aluminum
L-H 5-125 ppm
50 Tests
Nitrite Nitrogen
1-50 ppm
50 Tests
Sulfate
50-2000 ppm
50 Tests
Chloride
25-500 ppm
50 Tests
Ferric Iron
5-125 lbs/acre
50 Tests

Unit Conversion Factors

Unit Conversion Factors

Results can be measured using a choice of units, explained here. Parts per million (ppm), pounds/acre, and Kg/hectare units can be converted to each other using these values:

Area Soil Depth Soil Weight
1 acre 6-7 inches 2 mil lbs.
1 hectare 15-18 cm 2.25 mil Kg


ppm lb/Acre Kg/Hectare
1 2 1.13
0.5 1 0.565
0.88 1.77 1


A number of variables must be considered when interpreting soil test results in addition to the values obtained. These variables include the composition of the soil, drainage, climate, previous fertilizer programs, and the type of plant to be grown. Samples must also be truly representative of the area being studied and must be carefully selected.

Instructions

Model STH Series – Combination Soil Testing Outfit Instructions

SDS

Model STH Series – Combination Soil Testing Outfits SDS

BROMCRESOL GREEN INDICATOR 2207.PDF
CHLOROPHENOL RED INDICATOR 2209.PDF
BROMTHYMOL BLUE INDICATOR 2210.PDF
PHENOL RED INDICATOR 2211.PDF
THYMOL BLUE INDICATOR 2213.PDF
DUPLEX INDICATOR 2221.PDF
NITRATE REAGENT 1 5146.PDF
PHOSPHORUS REAGENT #3 TABLETS 5157.PDF
POTASSIUM REAGENT B TABLETS 5161.PDF
UNIVERSAL EXTRACTING SOLUTION 5173.PDF
SOIL FLOCCULATING REAGENT 5643.PDF

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