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Atoloye, IA.  2017.  Effects of a one-time compost addition on soil health in a rainfed dryland organic wheat system, 2017/04/13. Abstract

Maintaining adequate soil fertility and health is a challenge in dryland organic wheat systems. This research examines the short-term impact of a one-time addition of compost on the soil health in a rainfed dryland organic winter-wheat (Triticum aestivum L.) fallow system. Field plot experiments were established in 2015 in a semiarid dryland organic wheat field in Snowville, Utah with the following treatments: control (C), compost at 12.5 Mg/ha dry weight (CM1), 25 Mg/ha (CM2), 50 Mg/ha (CM3), positive control 25 Mg compost + 40 lb N feather meal (PC), and 2 Mg chicken manure (CMU). Soil samples were taken in May 2016 at a depth of 0-10 cm from the plots in the wheat phase of the rotation. Indicators of soil health and fertility were determined such as microbial biomass C, enzyme activities involved in the cycling of C and P, total organic carbon and nitrogen determined.The application of compost appeared to promote microbial activities with the greatest effect at CM3. Acid and alkaline phosphatase enzyme activities significantly increased by as much as 61 % and 47 % respectively. Microbial biomass carbon, dehydrogenase enzyme activity, readily mineralizable carbon, total organic carbon and total nitrogen were highest at CM3.
Based on our findings so far, compost addition stimulated soil microbial activities and boosted organic C and N in the surface layers of the soil. Outcomes of this study will contribute to the overall goal of enhancing productivity and sustainability of rainfed dryland organic winter-wheat.

Atoloye, IA.  2017.  From agricultural residues to biofertilizers: preparation and characterization for use in hydroponics, 2017/04/08. American Open Chemistry Journal. 3:1-14. Abstract
B. Favoretto Pigatin, L´via, Atoloye IA, Abosede Obikoya O, Vinicius Borsato A´lio, Olı´mpia Oliveira Rezende M.  2016.  Chemical study of vermicomposted agroindustrial wastes, 2016/02/08. Int J Recycl Org Waste Agricult. 5 Abstract

PurposeThe disposal of solid waste is a serious environmental problem for humanity. Vermicomposting is used as one of the methods for recycling of organic waste, resulting in a humified material of great agronomic potential which promotes carbon sequestration when applied to the soil. The aim of this study was to evaluate the chemical characteristics of vermicomposts from cattle manure (CM), orange peel (OP) and filter cake (FC).
Three compost piles were set up, 2:1 OP + CM, 3:1 FC + CM and CM. The piles were initially composted for 60 days. Thereafter, earthworms were added to the piles to initiate the vermicomposting process.
The pH and the organic carbon contents were above the minimum recommended values for organic fertilizers. The N content was below the minimum value but the C/N ratio was in the required range. The C/N values where lower in OP + CM and FC + CM than in CM. Further, the N contents of treatments were different with OP + CM having the highest value. The C/N ratios of the piles were 9.52, 9.62 and 11.03 for OP + CM, FC + CM and CM, respectively, and were lower than the maximum recommended value by the Ministry of Agriculture, Livestock and Food (Ministry of Agriculture 2009).
Thus, co-vermicomposting of filter cake and orange peel with cattle manure has the potential for application sustainable agriculture.

Atoloye, IA, Olayinka A.  2015.   Separate and combined applications of organic and inorganic fertilizers influence growth and nutrient uptake by Zea mays (L.). . Nigerian Journal of Soil Science . 25(Special):247-257.