| Display: | Needle |
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| Portable: | Portable |
| Appliance: | Biochemistry |
| Certification: | CE |
| Transport Package: | Normal Carton |
| Origin: | China |
| Samples: |
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| Customization: |
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Audited Supplier Body size :11*6*3CM
Probe length: 16cm
Net weight: 150 g
Instructions:
When measuring the PH value of the soil, first insert the probe as deep as possible into the soil, leaving about 1cm above the probe.
When using, please pay attention to the fact that the electrode should not touch the stone when inserting it, and do not use too hard, otherwise the electrode will be easily hurt. Wash the electrode after using it.
Soil ph
Soil ph is also called "soil reaction".It is an acid-base reaction of soil solution.It depends on the concentration of hydrogen ions in the soil solution, expressed in pH value.A solution with a pH of 7 is neutral;PH value less than 7 is an acidic reaction.A pH greater than 7 is an alkaline reaction.Soil ph can generally be divided into the following grades:
PH value of soil pH
< 4.5 extremely acidic
4.5 5.5 strongly acidic
5.5 6.5 acid
6.5 7.5 neutral
7.5 8.5 alkalinity
8.5 9.5 strong alkaline
> 9.5 is extremely alkaline
Soil pH has a great influence on soil fertility and plant growth. PH value of many soils in northwest and north China is high, while pH value of red soil in south China is low.So you can grow crops and plants that match the ph of the soil.Such as red soil area can be planted acid like tea, and alfalfa alkali resistance is strong.Soil ph also has a great influence on the availability of nutrients, such as the availability of phosphorus in neutral soil.The availability of trace elements (manganese, copper, zinc, etc.) in alkaline soil is poor.In agricultural production, we should pay attention to the ph of soil, and take active measures to adjust it.
What is the best soil ph range for common crops?
Soil ph has a great influence on plant nutrient availability, soil structure and crop growth.First of all, the organic nutrients in soil can be transformed into rapidly available nutrients for absorption by plants only when soil microorganisms participate in activities. Most of the microorganisms involved in the decomposition of organic matter grow and develop in a nearly neutral environment. Therefore, the availability of soil nutrients is generally best when the reaction is close to neutral.Secondly, soil ph also has an effect on soil structure.Acid soil, the concentration of hydrogen ions, easy to replace calcium ions in the colloid leaching, so acid soil is easy to harden.Alkaline soil contains a lot of substitutive sodium ion and oxyhydrogen ion, which makes the soil particles disperse and harden after drying, resulting in poor structure of alkaline soil.In addition, soil ph is closely related to plant growth.In nature, some plants have strict requirements on soil acid and alkali conditions. They can only grow in a specific range of acid and alkali. These plants can play an indicator role for soil ph, so they are called indicator plants.For example, it grows only on acidic soil and is called an indicator plant of acidic soil.Cypress is the indicator plant of calcareous soil, and calcareous soil is the indicator plant of calcareous soil.Different cultivated plants also have different optimal growth ph range (see the table below). Knowing their respective optimal growth range, we can choose suitable crops according to the ph of soil according to local conditions.Or, depending on the crop, adjust the ph of the soil to an appropriate range.
Main crops grow the best soil ph
Crop name ph value crop name ph value
Rice 6.0-7.0 peanut 5.0-6.0 chestnut 5.0-6.0
Wheat 6.0-7.0 tobacco 5.0-6.0 watermelon 6.0-7.0
Corn 6.0-7.0 tea 5.0-5.5 cabbage 6.0-7.0
Soy 6.0-7.0 potatoes 4.8-5.4 tomatoes 6.0-7.0
Sugarcane 6.0-8.0 orange, mandarin 5.0-7.0 pumpkin 6.0-8.0
Sweet potato 6.0-6.0 litchi 6.0-7.0 cucumber 6.0-8.0
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