Manual

ManualsBrandsHanna Instruments ManualsMeasuring instrumentsHI 38050

Nitrate Test

Handbook

Soil Science

and Management

HI 38050

Nitrate Test Kit

for Soil and

Irrigation Water

Manufacturers since 1978

ISTR38050 01/01 PRINTED IN ITALY

www.hannainst.com

HANNA LITERATURE

Hanna publishes a wide range of catalogs and handbooks for

an equally wide range of applications. The reference literature

currently covers areas such as:

• Water Treatment

• Process

• Swimming Pools

• Agriculture

• Food

• Laboratory

• Thermometry

and many others. New reference material is constantly being

added to the library.

For these and other catalogs, handbooks and leaflets contact

your dealer or the Hanna Customer Service Center nearest to

you. To find the Hanna Office in your vicinity, check our home

page at www.hannainst.com.

Summary of content (6 pages)

PAGE 1
HI 38050 Nitrate Test Kit for Soil and Irrigation Water HANNA LITERATURE Hanna publishes a wide range of catalogs and handbooks for an equally wide range of applications. The reference literature currently covers areas such as: • • • • • • • Water Treatment Process Swimming Pools Agriculture Food Laboratory Thermometry Nitrate Test Handbook and many others. New reference material is constantly being added to the library.
PAGE 2
Index INTRODUCTION .................................................................................................... 4 THE NITROGEN CYCLE ........................................................................................... 4 WHY AND WHEN TO TEST FOR NITROGEN .............................................................. 5 HOW TO COLLECT SOIL SAMPLES ............................................................................. 5 FERTILIZATION RECOMMENDATIONS .......................................
PAGE 3
TEST PROCEDURE FOR DETERMINING NITRATE IN SOIL SAMPLES CALCIUM SULFATE EXTRACTION 7- Remove the cap and fill the Demineralizer Bottle with tap water. 8- Replace the cap and shake gently for at least 2 minutes. The demineralized water is now ready. 9- Flip open the top of the Demineralizer Bottle cap. Squeeze gently the bottle to add demineralized water to the test tube up to the 20 mL mark.
PAGE 4
INTRODUCTION Nitrogen (N) is an indispensable element for plant life. It is present in proteins, vitamins, chlorophyll, etc. Nitrogen allows the development of the vegetative activity of the plant, in particular, causes a lengthening of trunks and sprouts and increases the production of foliage and fruit. It directly increases the crop yield, though the crop quality depends on other elements.
PAGE 5
CONVERSION FACTORS 1 kg 1 ha 1 kg/ha 1 ppm (soil) 1 ppm (irrigation water) 1 ppm N 2.205 lb. 2.471 acre 0.891 lb./acre 1 mg/kg 1 mg/L 4.43 ppm NO3 WARNING This test gives accurate results for most soil types, nevertheless, some local circumstances can cause erroneous readings. Therefore use this test always with caution. Whereas an insufficient dose of nutrients decreases the potential crop production, an excess can have a detrimental effect on the physiology of the plants and the crop quality.
PAGE 6
FERTILIZATION RECOMMENDATIONS 6) From this mixture, take the quantity of soil that you need for the analyses. 7) Crumble the large chunks and distribute the soil sample on plastic to air dry it. The sample dries faster if a fan is used to move air across the sample. 8) Use a small bar to crush the air dried sample and pass it through the 2-mm soil sieve. Do not store the samples longer than 24 hours in a closed plastic bag.