The N-supplying ability of the soil and the achievable yield depend, among other things, on the size of the 0.01 M CaCl2-soluble organic N fraction. The present work investigated how the plant status and yield changed within the field in a heterogeneous plant stand, and how this was correlated with the size of the 0.01 M CaCl2-soluble organic N fraction. A plant height map was prepared for a sample area measuring 10.4 hectares, after which sampling points were designated in several replications on areas with different plant height. Yield and soil samples were taken at each sampling point. The results showed that the yield, the SPAD index of the leaves and the size of the 0.01 M CaCl2-soluble organic N fraction in the soil increased parallel with the plant height, while the heterogeneity of the yield declined. It was found that spatial variability in the size of the 0.01 M CaCl 2-soluble organic N fraction might play a role in the heterogeneity of the plant stand. The yield can be estimated from regression equations expressing the correlation between the size of the 0.01 M CaCl 2-soluble organic N fraction and the yield, but the accuracy of the estimation differed in plant stands with diverse plant status.
|Translated title of the contribution||Correlation between the 0.01 M CaCl2-soluble organic nitrogen content of the soil and the status and yield of the crop|
|Number of pages||14|
|Journal||Agrokemia es Talajtan|
|Publication status||Published - Jun 1 2011|
ASJC Scopus subject areas
- Agronomy and Crop Science
- Soil Science