| |
Publication Type:
| Refereed |
Author(s): | Michel, Frederick C. Jr.;
Forney, Larry J.;
Huang, Andrew J.-F.;
Drew, Susan;
Czuprenski, Michael;
Lindeberg, J. D.;
Reddy, C. Adinarayana |
Author Affiliation: | NSF-Center for Microbial Ecology, Michigan State University, East Lansing Michigan; Resource Recycling Systems, Ann Arbor, Michigan; Southeast Oakland County Resource Recovery Authority, Royal Oak, Michigan |
Title: | Effects of turning frequency, leaves to grass mix ratio and windrow vs. pile configuration on the composting of yard trimmings |
Source: | Compost Science & Utilization. Vol. 4, No. 1, Winter 1996, p. 26-43. |
Publishing Information: | Emmaus, PA: JG Press |
# of Pages: | 13 |
Keywords: | TIC Keywords: Yard waste; Composting; pH; Clipping utilization
|
Abstract/Contents: | "Because of proposed bans on the landfilling and incineration of leaves, grass and brush, large-scale composting is fast becoming the primary disposal option for yard trimmings in many states. Few systematic studies have been done to compare the effects of turning regime, feedstock mix ratio, or windrow vs. pile configuration on composting and the characteristics of finished compost. In this study, various ratios of leaves, grass and brush were mixed and composted in two series of windrows; and one set of static piles. One windrow series (#1) was turned seven times every four weeks, while the other windrow series (#2) and the piles, were turned once every four weeks. The effects of the different treatments were examined by measuring compost temperature, oxygen concentration, pH, organic matter and moisture content, volatile fatty acid content, bulk density, stability, humification and seed germination indices, total and available nutrient levels, and particle size distribution. Results showed that turning frequency had little impact on oxygen concentrations, VFA content and temperatures during the composting of yard trimmings in windrows, however, in piles temperatures were substantially higher and oxygen concentration fluctuated greatly. The composts from all the treatments were stable, (oxygen uptake rates <0.1 mg 0²/g OM/hr) after 60 days of composting regardless of the turning frequency, mix ratio or configuration. The bulk density increased much more rapidly in frequently turned windrows than in the other treatments and particle sizes were smaller in these windrows. In most respects however, the final composts (day 136) were remarkably similar and none inhibited Cress seed germination or root elongation. The pH of all the composts, and the soluble salts and nitrate levels in composts made with high levels of grass, exceeded guidelines for greenhouse growth media." |
Language: | English |
References: | 26 |
See Also: | Other items relating to: YARD
Other items relating to: COMPR0 |
Note: | Figures Tables |
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete): Michel, F. C. Jr., L. J. Forney, A. J.-F. Huang, S. Drew, M. Czuprenski, J. D. Lindeberg, et al. 1996. Effects of turning frequency, leaves to grass mix ratio and windrow vs. pile configuration on the composting of yard trimmings. Compost Sci. Util. 4(1):p. 26-43. |
| Fastlink to access this record outside TGIF: https://tic.msu.edu/tgif/flink?recno=36934 |
| If there are problems with this record, send us feedback about record 36934. |
| Choices for finding the above item: |
| MSU catalog number: TD 796.5 .C584 |
| Request through your local library's inter-library loan service (bring or send a copy of this TGIF record) |