Soil and plants interact in the search for and supply of nutrients. Soil provides the environment for plant growth while plants participate in building and sustaining soils by releasing exudates and leaving behind their own residues. This dynamic cycle is best described as the soil-plant system. In the process, humus is formed and carbon dioxide (CO2) is released due to microbial activity. The relationship between these processes is an important indicator of soil fertility. Declining rates of CO2 respiration are associated with intensive tilling, compaction and over fertilizing. These soil practices are potentially destructive and inhibit the soil’s ability to sustain its humus content, the natural reservoir of organic nutrients and soil life. As soil declines, microbes starve for food and the rate of CO2 respiration decreases, indicating deteriorated soil quality. Being able to evaluate the turnover of organic matter via CO2 respiration is important for a number of reasons:


• Indicator of soil health – The rates of CO2 release is generally regarded as an indicator of Soil Health and is favorably improved with practices such as cover cropping, where the quality of soil is improved by building the organic matter through accumulation and decay of roots and plant litter.

• Indicator of soil nutrients – Measure and evaluate the rate of carbon exchange, to estimate potential release of nutrients such as nitrogen and phosphorus that are components of humus.

soil-analysis


Code Analysis Name Description Days
CNSA031 Basic Soil Analysis pH, EC, %OM, %N, P, K, Mg, Ca with Basic Recommendations 7
CNSA022 Complete Soil Analysis pH, EC, %OM, %N, P, K, Ca, Mg, Na, S, Fe, Mn, Cu, B, Zn, CEC, Ca:Mg ratio, %Ca, %Mg, %K, %Na, %OB, %H with Full Recommendations 7
CNSA104 Available Soil Nitrogen Available Soil Nitrogen kg/Ha (Top soil + Sub soil) 7
CNSA040 Soil Life Test Soil Biota Respiration Test (indicator of soil health) 7
CNSA090 Exchangeable Acidity (Hp) Hp 7
CNSA050 Soil Texture Analysis % Sand, % Silt, % Clay (Texture Class) 10
CNSA091 Heavy Metals As, B, Cd, Co, Cr, Cu, Hg, Pb, Ni, Se, Zn 10