Browsing by Subject "Acid soils"
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- ItemRelative Performance of Coated Blends, Granular Blends and Compound Fertilizers on Maize Yield(2022-11-30) Reda Ahmed; Genga Quintar ; Ngunjiri Mercy; Leonardus Vergutz; Wendt JohnMulti-nutrient fertilizers are becoming increasingly popular. Differences in relative crop response between blended and compound fertilizer forms have received little attention. This study was carried out to investigate the relative performance of a compound fertilizer, a blend formulated with coated micronutrients (zinc and boron), and a blend formulated with granular micronutrients. Yara MilaTM PowerTM compound fertilizer was used as the nutrient reference fertilizer, and two blends were formulated to apply the same amounts of nutrients per hectare. Both full and half rates of each fertilizer were applied. A randomized complete block design (RCBD) with four replications was employed at two sites in Bungoma county, Kenya using maize as a test crop. Ear-leaf analyses showed non-significant differences for most nutrients in most treatments within sites, with leaf N, K, S, B and Zn deficiency evident at both sites. Leaf deficiencies of Zn and B suggest that rates may not have been adequate for optimal production. Site 2 (pH 4.52) showed substantially lower ear-leaf nutrient concentrations compared with Site 1 (pH 5.14), particularly for Mg and Ca, which were also deficient in initial soil analysis at both sites. At Site 1, no significant differences were noted between the micronutrient coated blend, granular blend and compound, and yields were greatest at the full rate of fertilizer. At Site 2, the micronutrient coated blend gave significantly greater yields than the granular blend and the compound, and yields were not affected by fertilizer rate. We conclude that micronutrient-coated blends can be as effective or more effective than fertilizer compounds containing the same nutrient concentrations.
- ItemSeminar on Phosphate Rock for Direct Application(1979-12) IFDCThe IFDC Phosphate Program, established in 1974, focuses on three objectives: developing technology for efficient beneficiation of phosphate ores, identifying effective fertilizers for tropical and subtropical agriculture, and developing technologies for converting phosphate rock into fertilizers. The program aims to address the challenges posed by the depletion of easily accessible phosphate reserves and the need for more suitable fertilizers for small farmers in the developing world. Key activities include establishing a raw materials data file, researching beneficiation methods for low-quality ores, recovering phosphate slimes, and developing granulation and blending techniques for fertilizer production. The program aims to provide technical assistance, technology transfer, and manpower development to support sustainable agricultural practices in developing countries.