Справочник Пользователя для Hanna Instruments hi 993310
4
SOIL ACTIVITY
Plants absorb nutritive elements dissolved in irrigation water. The ion
concentration of the soil solution depends on the type of soil. Soil can
be rich or poor in nutrients depending on its chemical composition
and its property in retaining water and chemical elements. For
example, clay soil retains more water than sandy soil since it holds
more cations and has a greater microporosity, so that there is a
different availability of ions for the roots.
If the soil is dry, fewer ions are at plant’s disposal. This is the reason
why conductivity readings have to be considered referring to water
presence and soil type.
The HI 76305 soil probe makes it easier to control the soil conditions
and to manage the crops.
Plants absorb nutritive elements dissolved in irrigation water. The ion
concentration of the soil solution depends on the type of soil. Soil can
be rich or poor in nutrients depending on its chemical composition
and its property in retaining water and chemical elements. For
example, clay soil retains more water than sandy soil since it holds
more cations and has a greater microporosity, so that there is a
different availability of ions for the roots.
If the soil is dry, fewer ions are at plant’s disposal. This is the reason
why conductivity readings have to be considered referring to water
presence and soil type.
The HI 76305 soil probe makes it easier to control the soil conditions
and to manage the crops.
SOIL PROBE
The HI 76305 soil probe provides a rapid response and an easy way
to test the soil activity in a variety of applications, as fertilization and
irrigation.
How to use the soil probe:
- Insert the probe in the soil where the roots are more dense or
numerous.
- The recommended depth is 10-15 cm (4-6") for lawn and young
plants, 20-30 cm (8-12") for vegetables and small plants.
- For plants with deep roots (e.g. trees, maize, sunflower, etc.), take
measurements at different depths, e.g. 30 and 50 cm (12 and 20").
- Take measurements in more spots to have a representative average.
- The soil has to be wet. If the soil is dry, add demineralized water.
- The probe tip must be in complete contact with the soil. If the
substrate is too soft, press it with your fingers to achieve a proper
contact.
- Wait until the value on the display is stabilized.
The HI 76305 soil probe provides a rapid response and an easy way
to test the soil activity in a variety of applications, as fertilization and
irrigation.
How to use the soil probe:
- Insert the probe in the soil where the roots are more dense or
numerous.
- The recommended depth is 10-15 cm (4-6") for lawn and young
plants, 20-30 cm (8-12") for vegetables and small plants.
- For plants with deep roots (e.g. trees, maize, sunflower, etc.), take
measurements at different depths, e.g. 30 and 50 cm (12 and 20").
- Take measurements in more spots to have a representative average.
- The soil has to be wet. If the soil is dry, add demineralized water.
- The probe tip must be in complete contact with the soil. If the
substrate is too soft, press it with your fingers to achieve a proper
contact.
- Wait until the value on the display is stabilized.
FERTILIZATION
By measuring the salt contents in soil and substrates, before and
after the fertilization, it is possible to have information about the soil
fertility and to design an appropriate fertilization plan. Consequently,
the plants will receive the right quantity of nutrients resulting in a
regular and rapid growth, greater resistance to disease and a more
appealing state manifesting their well being.
The younger plants, especially those that have just germinated, are
By measuring the salt contents in soil and substrates, before and
after the fertilization, it is possible to have information about the soil
fertility and to design an appropriate fertilization plan. Consequently,
the plants will receive the right quantity of nutrients resulting in a
regular and rapid growth, greater resistance to disease and a more
appealing state manifesting their well being.
The younger plants, especially those that have just germinated, are
SOIL ACTIVITY