Soil sampling and analysis
Soil sampling and analysis
Soil studies play an important role in crop production and nutrient management. Soil sampling and analysis is important for farms to be able to provide nutrient replenishment as cost-effectively as possible according to the needs of the crop. Evaluating the results of the soil studies, the nutrient management plans of the farm can be prepared.
The purpose of soil tests
- Prevent problems
- Check that the plant is in good condition
- Find solutions to problems in the field (eg lack of symptoms)
- Achieve optimal yield and quality in accordance with legal requirements
- Accurate estimation of actual and conditionally available nutrients
- It is important to use analyzes when preparing a nutrient management plan
- Based on the analyzes, create a goal-oriented nutrient application plan
- Prevention of pollution (eg protection of water quality)
Laboratory soil testing
Successful sampling is greatly influenced by the sampling method used. Analyzes obtained from the examination of soil samples are authentic if the soil sample sent for analysis is also taken on the basis of the descriptions.
Soil testing is a process in which soil-forming minerals (phosphorus, potassium, calcium, magnesium, sodium, sulfur, manganese, copper and zinc, etc.) are chemically extracted from the soil and then measured. The nutrient content that can be determined from the sample influences the application rate of the proposed fertilizer and organic fertilizer. Soil analysis can also determine the nutrient content, pH value, organic matter content, and cation exchange capacity of the soil.
Plant sampling and analysis
Plant analysis is used as a control to determine if the fertilization plan used at the beginning of the growing season is still sufficient or additional nutrient application is required.
The purpose of plant testing?
Organic matter management
- Information on the current state of the plant
- The nutrient content of growing plants can serve as information to remedy deficiency symptoms
- Calculation of nutrient intake
- Productivity / yield estimation
- Evaluation of a recently applied fertilization method
- Helps plan the nutrient supply of plants
An important indicator of soil fertility is the soil organic matter content. Organic matter is needed to maintain the chemical, physical and biological balance of the soil.
Adequate soil organic matter supply has a positive effect on crop production. Organic matter is a dynamic, changing resource that reflects the balance between newly replenished organic matter in the soil and the organic matter deficiency in the soil. To increase the organic matter content of the soil, we need to maximize the amount of newly introduced organic matter and reduce the loss of organic matter.
Important sources of soil organic matter supply are plant residues, organic fertilizers and compost. Only organic matter that has been in the soil for more than a year plays a role in the structure of soil organic matter. The residue can be considered as a slowly dissolving manure. The part of the organic matter that is still present in the soil after one year is called effective organic matter.