{"type": "FeatureCollection", "features": [{"id": "10.1007/s10457-006-9027-4", "type": "Feature", "geometry": null, "properties": {"updated": "2026-09-22T16:14:52Z", "type": "Journal Article", "created": "2007-01-17", "title": "Effects Of Organic And Mineral Fertilizer Inputs On Maize Yield And Soil Chemical Properties In A Maize Cropping System In Meru South District, Kenya", "description": "Soil nutrient depletion as a result of continuous cultivation of soils without adequate addition of external inputs is a major challenge in the highlands of Kenya. An experiment was set up in Meru South District, Kenya in 2000 to investigate the effects of different soil-incorporated organic (manure, Tithonia diversifolia, Calliandra calothyrsus, Leucaena leucocephala) and mineral fertilizer inputs on maize yield, and soil chemical properties over seven seasons. On average, tithonia treatments (with or without half recommended rate of mineral fertilizer) gave the highest grain yield (5.5 and 5.4\u00a0Mg\u00a0ha\u22121 respectively) while the control treatment gave the lowest yield (1.5\u00a0Mg\u00a0ha\u22121). After 2\u00a0years of trial implementation, total soil carbon and nitrogen contents were improved with the application of organic residues, and manure in particular improved soil calcium content. Results of the economic analysis indicated that on average across the seven seasons, tithonia with half recommended rate of mineral fertilizer treatment recorded the highest net benefit (USD 787\u00a0ha\u22121) while the control recorded the lowest (USD 272\u00a0ha\u22121). However, returns to labor or benefit-cost ratios were in most cases not significantly improved when organic materials were used.", "keywords": ["2. Zero hunger", "soil fertility", "yields", "forestry", "cropping systems", "04 agricultural and veterinary sciences", "fertilidad del suelo", "15. Life on land", "maize", "6. Clean water", "ma\u00edz", "sistemas de cultivo", "0401 agriculture", " forestry", " and fisheries", "inorganic fertilizers", "organic fertilizers", "abonos org\u00e1nicos", "abonos inorg\u00e1nicos", "rendimiento"]}, "links": [{"href": "https://doi.org/10.1007/s10457-006-9027-4"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Agroforestry%20Systems", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1007/s10457-006-9027-4", "name": "item", "description": "10.1007/s10457-006-9027-4", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s10457-006-9027-4"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2007-01-18T00:00:00Z"}}, {"id": "10.1017/s0014479711000895", "type": "Feature", "geometry": null, "properties": {"license": "Open Access", "updated": "2026-09-22T16:16:50Z", "type": "Journal Article", "created": "2011-10-11", "title": "Effect Of Reduced Tillage And Mineral Fertilizer Application On Maize And Soybean Productivity", "description": "SUMMARY<p>Reduced tillage is said to be one of the potential ways to reverse land degradation and ultimately increase the productivity of degrading soils of Africa. We hypothesised that crop yield following a modest application of 2 t ha\uffe2\uff88\uff921 of crop residue in a reduced tillage system is similar to the yield obtained from a conventional tillage system, and that incorporation of legumes in a cropping system leads to greater economic benefits as opposed to a cropping system involving continuous maize. Three cropping systems (continuous maize monocropping, legume/maize intercropping and rotation) under different tillage and residue management systems were tested in sub-humid western Kenya over 10 seasons. While soybean performed equally well in both tillage systems throughout, maize yield was lower in reduced than conventional tillage during the first five seasons but no significant differences were observed after season 6. Likewise, with crop residue application, yields in conventional and reduced tillage systems are comparable after season 6. Nitrogen and phosphorus increased yield by up to 100% compared with control. Gross margins were not significantly different among the cropping systems being only 6 to 39% more in the legume\uffe2\uff80\uff93cereal systems relative to similar treatments in continuous cereal monocropping system. After 10 seasons of reduced tillage production, the economic benefits for our cropping systems are still not attractive for a switch from the conventional to reduced tillage.</p>", "keywords": ["2. Zero hunger", "yields", "cropping systems", "04 agricultural and veterinary sciences", "15. Life on land", "sistemas de cultivo", "tillage", "0401 agriculture", " forestry", " and fisheries", "mineral nutrients", "labranza", "nutrientes minerales", "intercropping", "cultivo intercalado", "rendimiento"]}, "links": [{"href": "https://doi.org/10.1017/s0014479711000895"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Experimental%20Agriculture", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1017/s0014479711000895", "name": "item", "description": "10.1017/s0014479711000895", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1017/s0014479711000895"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2011-10-11T00:00:00Z"}}], "links": [{"rel": "self", "type": "application/geo+json", "title": "This document as GeoJSON", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=sistemas+de+cultivo&f=json", "hreflang": "en-US"}, {"rel": "alternate", "type": "text/html", "title": "This document as HTML", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=sistemas+de+cultivo&f=html", "hreflang": "en-US"}, {"rel": "collection", "type": "application/json", "title": "Collection URL", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main", "hreflang": "en-US"}, {"type": "application/geo+json", "rel": "first", "title": "items (first)", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=sistemas+de+cultivo&", "hreflang": "en-US"}, {"rel": "last", "type": "application/geo+json", "title": "items (last)", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=sistemas+de+cultivo&offset=2", "hreflang": "en-US"}], "numberMatched": 2, "numberReturned": 2, "distributedFeatures": [], "timeStamp": "2026-09-22T16:59:11.511011Z"}