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Table 1 Soil test

From: Tri-trophic interactions among nitrogen-fertilized tomato cultivars, the tomato fruit worm, Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae) and the ectoparasitoid, Habrobracon hebetor (Say) (Hymenoptera: Braconidae)

 

N

NH3

OCa

Sand

Silt

Clay

K

B

Cu

Zn

Fe

P

ECb

pH

Test

Kjeldahl

Titration

Titration

Hydrometer

Hydrometer

Hydrometer

Flame Photometerf

Azomethine He

Atomic

Atomic

Atomicd

Olsenc

Conductometer

pH meter

Normal

0.2<

1.5<

40–50

30–40

20–30

250

2

2

3

12

15

2>

6.5–7.5

Sample

0.04

0.01

5.4

88

6

6

108.4

1.84

1.16

12.09

7.24

20

4.83

6.85

  1. aOC organic carbon, bEC soil electrical conductivity, cOlsen soil P test method, dAtomic atomic absorption spectroscopy, eAzomethine H colorimetric reagent for B detection, fFlame Photometer determination of certain metal ions