2018
DOI: 10.1590/18069657rbcs20170327
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Abstract: The efficiency index (EI) refers to the ratio of nutrients mineralized/made available in the soil to the total amount of nutrients added by organic fertilizer. Therefore, understanding the EI is essential for recommendation of organic fertilization. The aim of this study was to evaluate the availability through mineralization and the efficiency index of nitrogen (N), phosphorus (P), and potassium (K) in organic fertilizers produced from cattle manure. The following treatments were evaluated in an incubation ex… Show more

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Cited by 18 publications
(11 citation statements)
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“…Higher yields obtained on treatments under Zai pits with cattle manure in comparison to conventional planting with cattle manure imply that there was better interaction between Zai pit and cattle manure than conventional planting with cattle manure and hence more increment in grain yields. The increase in yields was most likely because cattle manure conserves soil moisture content, as well as the high levels of N realised from cattle manure ( Onduru et al., 2008 ; Eckhardt et al., 2018 ). This is in agreement with Graham et al.…”
Section: Discussionmentioning
confidence: 99%
“…Higher yields obtained on treatments under Zai pits with cattle manure in comparison to conventional planting with cattle manure imply that there was better interaction between Zai pit and cattle manure than conventional planting with cattle manure and hence more increment in grain yields. The increase in yields was most likely because cattle manure conserves soil moisture content, as well as the high levels of N realised from cattle manure ( Onduru et al., 2008 ; Eckhardt et al., 2018 ). This is in agreement with Graham et al.…”
Section: Discussionmentioning
confidence: 99%
“…The pH of composts was measured in a 1: 2.5 (weight: weight) 1 M KCl extract, using digital pH meter (Piper, 1966). The nutrient contents of the composts (Table 5S2) were close to the values reported for chicken manure, pig manure and kitchen waste composts by others (Eckhardt et al, 2018;Huang et al, 2017;Komiyama et al, 2014;Yokota et al, 2003;Zamil et al, 2015). The field experiment was conducted as randomized complete block design with 13 treatments (Table 5.S3).…”
Section: Design and Execution Of The Experimentssupporting
confidence: 85%
“…The composting processes yielded higher contents of P, K, Ca, and S compared to the vermicomposting processes. In the vermicomposting process, intense degradation of organic compounds due to synergistic action between microorganisms and earthworms was expected, resulting in greater mineralization of organic P, for example (Eckhardt et al, 2018).…”
Section: Discussionmentioning
confidence: 99%