EVALUATION OF SOIL AND PETIOLE SAP NITRATE QUICK TESTS FOR BROCCOLI IN QUÉBEC.

J. Coulombe, S. Villeneuve, P. Lamy, S. Yelle, C. Bélec, N. Tremblay
This study was conducted to evaluate the potential of a quick test method, using commercially available nitrate test strips and a hand-held reflectometer, to assess the N status of petiole sap and soil in commercial broccoli fields. Experiments were conducted at two locations during the 1996 and 1997 growing seasons with factorial combinations of three and four N rates at planting and five weeks after planting, respectively. The use of quick nitrate tests on soil samples at planting was appropriate for adjusting initial N applications according to levels actually present in the soil. Petiole sap quick test results were related to N fertilization rates for both application dates. Also, quick N test data for sap samples were related to yield and head susceptibility to hollow stem, and have shown potential to quantify appropriate side-dressed N applications.
Coulombe, J., Villeneuve, S., Lamy, P., Yelle, S., Bélec, C. and Tremblay, N. (1999). EVALUATION OF SOIL AND PETIOLE SAP NITRATE QUICK TESTS FOR BROCCOLI IN QUÉBEC.. Acta Hortic. 506, 147-152
DOI: 10.17660/ActaHortic.1999.506.20
https://doi.org/10.17660/ActaHortic.1999.506.20

Acta Horticulturae