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article/chapitre/communication
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article/chapitre/communication
B. Van Raij ; H. Canterella | 1996The establishment of a quantitative relationship between crop yields and amounts of applied nutrients is essential for fertilizer recommendations. A model was developed that uses yield goals, results of a soil analysis, and cost/value ratios for[...]![]()
article/chapitre/communication
M. Piedallu | 1992![]()
article/chapitre/communication