Assessment of nitrogen fertilizer requirement : proceedings of the second meeting of the NW-European study group for the assessment of nitrogen fertilizer requirement, held at Haren 14-16 May 1984 / ed.: J.J. Neeteson and K. Dilz
Assessment of nitrogen fertilizer requirement : proceedings of the second meeting of the NW-European study group for the assessment of nitrogen fertilizer requirement, held at Haren 14-16 May 1984