How To Get The Soil Tested?ĭeciding on how to conduct a soil test, you can choose any options: Correlation of NDVI and soil moisture in the sunflower field with loamy soil. In this case, the model showed that the harvesting resulted in 2374 kg/ha of crop instead of the maximum possible 3961 kg/ha. In June, the humidity drops below 25% – the wilting point – and this is reflected in the NDVI. To keep the maximum yield, it can be lowered by 40%. The optimum level of humidity for sunflower growing on loamy soil is 65%. The chart below shows a correlation between soil moisture and NDVI. Additionally, the NDMI index on EOSDA Crop Monitoring helps find critical zones, and further soil moisture sampling of these areas will show if they are indeed dehydrated. Based on this data, farmers can predict the moisture deficit and make proper decisions. Besides, historical data shows the moisture level at each plant growth stage. EOSDA Crop Monitoring allows checking the surface and root-zone moisture levels remotely. It is important to monitor the moisture in the field before seeding and throughout the whole season to get high yields. University of Florida, Institute of Food and Agricultural Sciences Extension. Soil testing for plant-available nutrients-what is it and why do we use it? Publication #Sl408. The obtained number is the soil-test index George Hochmuth, Rao Mylavarapu, and Ed Hanlon. Then, the liquid content is filtered and analyzed for chemical elements’ presence and concentrations (converted to dry matter). To test soil nutrient content, a sample is added to an extractant solution and mixed (typically by shaking). An extended test also includes minor elements like iron (Fe), manganese (Mg), boron (B), molybdenum (Mo), and others. Secondary nutrients to examine are calcium (Ca), sulfur (S), and magnesium (Mg). Primarily, soil tests report on the content of nitrogen (N), phosphorus (P), and potassium (K), which are the most important nutrients for crops.
This is why the chemical test for soil nutrients is the most common.
Valuable information on nutrients content allows accurate fertilization to support plant needs within precision agriculture implementations. The most frequently-used types analyze and measure: The analysis type depends on the explored components or properties of the field ground that may beneficially or adversely impact crop development. Such tests also provide information on chemical contamination, humic or organic content, electric conductivity, cation exchange capacity, and other physical and chemical properties. It is the farmland analysis for multiple parameters like chemical content, toxicity, pH level, salinity, earth-dwelling biota, etc.
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