EFFECT OF SOME SOIL APPLIED HERBICIDES ON SOIL MICROFLORA

A study on the effect of some herbicides on the number of soil microbial populations and microbial activity was conducted. The herbicides Adengo (225 g/l Isoxaflutol + 90 g/l Thiencarbazone-methyl + 150 g/l Ciprosulfamide (antidote)), Dual Gold (960g/l S-metolachlor), Marlin Flexx (240 g/l isoxaflutol) were applied, in optimal and doubled dose. There was a decrease in the amount of ammonifying bacteria, actinomycetes, nitrifying bacteria, soil fungi in some of the treatments, and the strongest effect, especially in the initial stages of incubation is the suppression of nitrogen-fixing bacteria. After 120 days of incubation in most variants of the experiment, the suppressive effect of herbicides disappeared

EMPIRICAL APPROACH FOR ASSESSMENT OF SOIL ORGANIC CARBON LOSSES BY WATER EROSION ON CALCIC CHERNOZEM

Water erosion and loss of soil organic matter cause significant damages on the national economy of the Republic of Bulgaria. For development of sustainable agricultural systems, it is necessary to predict the development of these two degradation processes in order to effectively control them. Many models and methods have been created for this aim. Two of ways for assessment of soil organic carbon losses by water erosion are the parametric and the empiric approaches. The parameter sediment enrichment ratio (ER) was determined for two crops, grown by four tillage systems (in six years experiment. Except the parametric method, an empirical equation was developed for assessment of organic carbon losses by the amount of soil eroded

PERFORMANCE OF WIRELESS MEASUREMENT SYSTEM FOR SOIL PROPERTIES MONITORING

A developed wireless microprocessor system based on ATmega328P microcontroller and Arduino sensors for measurement of soil properties is described in the paper. The accuracy of the proposed system is analized during the measurement of basic soil parameters – electrical conductivity and acidity. The system has been experimentally tested with soil samples from eight soil types and soil solution. The results for the soil parameters obtained with the wireless measurement system are compared with a reference measuring instrument. The presented wireless system for soil parameters monitoring shows good measurement accuracy sufficient for engineering research

PERFORMANCE OF WIRELESS MEASUREMENT SYSTEM FOR SOIL PROPERTIES MONITORING

A developed wireless microprocessor system based on ATmega328P microcontroller and Arduino sensors for measurement of soil properties is described in the paper. The accuracy of the proposed system is analized during the measurement of basic soil parameters – electrical conductivity and acidity. The system has been experimentally tested with soil samples from eight soil types and soil solution. The results for the soil parameters obtained with the wireless measurement system are compared with a reference measuring instrument. The presented wireless system for soil parameters monitoring shows good measurement accuracy sufficient for engineering research

Comparative Study of Microbial Activity and Chemical Properties of Soil by Implementing Anti-erosion Measure Vertical Mulching with Organic Residues

Water soil erosion is a phenomenon in which soil particles are separated transported and translocated by the action of rain water. Removal of topsoil by water flow leads to a decrease of humus in the soil, deterioration of soil structure, compaction, and reduction of microbial activity.Developed and tested have been number of methods and technologies for soil protection from the effects of water erosion. Such technology is vertical mulching, and straw or compost applied as mulching material.This work is a study of the changes that occur in some soil chemical properties and soil microbiological activity, as a result in the implementation of anti-erosion measure vertical mulching with different mulching materials for growing corn and wheat grain on carbonate chernozem, on sloping agricultural lands