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Researchers report variable mineralization and limited substitution of irrigation nitrate for fertilizer in crop trials
Summary
Presenters reported that mineralization of organic fertilizers varies widely by product and soil; liquid fertilizers mineralized faster than pelleted products, and trials showed irrigation water high in nitrate did not reliably replace fertilizer for marketable yields in broccoli trials, particularly on sandy soils.
Researchers presenting to the agricultural expert panel described trials comparing organic pellet mineralization, liquid fertilizer mineralization and the potential to use high‑nitrate irrigation water as a nitrogen source for crops.
Presenters identified different mineralization rates by product and soil type. In replicated soil incubations, some liquid products…
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