Biological dinitrogen fixation and its economical importance for agriculture

The measurement of biological N2 fixation is of considerable importance and recently AN values of the legume and non-nodulating crop using 15N labelled fertilizer were used extensively to estimate the amount of N2 fixed legume crop growing under field conditions. The objective of this research was to estimate biological N2 fixation under field conditions using 15N labelled fertilizer and growing Calland soybean and corn as the test plants. A field experiment was conducted at Cukurova (Adana) using randomized block design and 4 replications for each treatment. For the both crops 4 nitrogen rates and for soybean 4 inoculation rates were applied. (author)