Confrontation of null balances of phosphorus and potassium calculated in two ways from long-term field trial | Srovnání nulových bilancí fosforu a draslíku vypočtených dvěma způsoby z dlouhodobého polního pokusu
2009
Macháček, V., Výzkumný ústav rostlinné výroby, Praha 6 - Ruzyně (Czech Republic) | Ivičic, P. | Medešiová, L.
The results from long-term field experiments was utilized to confrontation of two types of null balances: null balance calculated from difference inputs and outputs of phosphorus and potassium and null balance calculated from time dependence on the doses of Pmin and Kmin. The results from control variants and variants with manure was used in three combinations of Pmin and Kmin. The different values of null balance was obtained from both types of balances and all values of null balance copy doses of Pmin and Kmin. The lower doses of Pm gt n and Kmm was always calculated on variants with manure than on control variants. On identical doses of Pmin and Kmin time changes in content of available nutrients are lower on the variants with manure than on control variant. Null balance calculated from time function includes soil properties and soil fertility.
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