To find more sources and processes for recovery or recycling of the main fertilizer nutrients N, P and K from wastes and wastewater a narrower search in journals and patents from this larger set was used to see what trends related to recycling nutrients for fertilizers from these sources are present in the dataset (See SI Methods: Narrow Search). Co-occurring topics were visualized in clustered network diagrams, this time focusing more on "recycling" and "fertilizers" to determine topics most closely clustered with them. Adding search terms for waste and wastewater to narrow the focus to publications related to those with recycling of wastes or wastewaters with fertilizer nutrients by adding search terms for phosphorus, nitrogen, or potassium. From the cluster diagrams it was determined that organic nutrient sources, derived products and process-related terms associated with fertilizers were main focuses in journals (Fig. ) and patents (Fig. ). The narrower topical diagrams again show a slightly different focus from basic in journals to applied research in patents on the topics related to recovering and recycling fertilizer nutrients from wastes and wastewaters. A closer examination of the paired topics closely associated with "recycling" in journals reveals that "nutrients", "phosphates", "nitrates", "nitrites", "phosphorus fertilizers", "nitrogen fertilizers", "soil amendments", and "manure" are also associated most closely with "wastewater treatment sludge", "wastewater", and "wastewater treatment". Recycling is also related to "fertilizer experiment" and "economics" in the journal set (See SI Fig. ).