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Digestate & compost in agriculture reports

The digestate & compost in agriculture (DC-Agri) project was a five year research project looking at the use of quality anaerobic digestate (biofertiliser) and compost in agriculture.

DC-Agri research summary provides an overview of the key findings of the study.

Work Package 1: Effects on soil and crop quality

The  aim  of  this  work  package  was  to  investigate  the  effects  of  repeat  applications ( i.e. annual applications over a minimum of three years) of compost (green and green/food) and digestate (food - and manure -based)  in  comparison  with  farmyard  manure  (FYM)  and livestock  slurry  on  soil  and  crop  quality  at  a  range  of  experimental  sites  with  varying  soil types,  climatic  conditions  and  cropping.

The results clearly demonstrated that repeated applications of compost are a valuable means by which farmers can improve soil quality. 

Read the Work Package 1: Effects on soil and crop quality report, you can also view Work Package 1 : Appendices.

Work Package 2: Digestate Nitrogen Supply & Environmental Emissions

The aim of the report was the quantification of  the  nitrogen  supply  characteristics  of  contrasting  digestate  and compost  products,  including  the  impact  of  digestate  and  compost  additions  on  nitrous  oxide  and  ammonia  emissions  to  air  and  leaching  losses  (nitrate,  phosphorus  and  microbial  pathogens)  to  water,  and  the effect  of  bandspread/shallow  injected  digestate  and  slurry  application  techniques  on  fertiliser  N  replacement  values,  and  crop yields and quality.

Read the Work Package 2: Digestate Nitrogen Supply & Environmental Emissions

The project was funded jointly by Defra, WRAP, WRAP Cymru and Zero Waste Scotland.

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