National Repository of Grey Literature 2 records found  Search took 0.00 seconds. 
Mapování půdních vlastností a ekonomické vyhodnocení variabilní aplikace zásobního hnojení
Blaha, Jiří
This master thesis is focused on the mapping of soil heterogenity by soil sampling. The experimental part of the work was realized on the arable land managed by agricultural holding Rostěnice a.s. within the research project NAZV QK21010247. Totally 1018 soil samples were taken during summer 2022 in irregular sampling grid in the area of 1 838 ha. After laboratory analysis of soil samples for estimation of main agri-chemical soil properties, a map of phosphorus was computed by using spatial interpolation techniques. The results has shown the high spatial variability within the observed fields. La-ter six variants of nutrient dose recommendation were compared. There were two uni-form rates (UNI_M3 and UNI_BK10) and four variable rates (VRA_M3, VRA_BK10, VRY_M3 and VRY_BK10). The economical evaluation prooved only small differences in total costs of phosporus fertilizers among the variants. However, the optimization of nutrient distribution within the fields based on the spatial heterogeneity and yield level is the main advantage of variable rate application.
Heterogeneity of elements during cast iron crystallization -cast iron with spherical graphite
Stránský, K. ; Šenberger, J. ; Kavička, F. ; Million, Bořivoj ; Dobrovská, J. ; Dobrovská, V. ; Rek, A.
Determination of chemical heterogeneity of alloying elements in iron cast with spherical graphite by using the local chemical analysis of elements. Calculation of chemical heterogenity of cast iron with spherical graphite on basis of thermodynamic, diffusion and phase characteristics.

Interested in being notified about new results for this query?
Subscribe to the RSS feed.