Ocena stanu odzywienia roslin azotem z zastosowaniem testow roslinnych

Nitrogen nutrition status of plants can be assessed either by direct or indirect tests. Direct tests consist in determination of total-N content in plant dry matter or N-O₃ content in green, indicator organs of the plants. Activity of nitrate reductase as well as the chlorophyll content in leaves are measured by indirect tests. Recently a fast and non-destructive chlorophyll measurement test with SPAD application is becoming more and more important.