TY  - DATA  
TI  - Woburn Organic Manuring Experiment organic manure chemical composition 1965-2019 
CY  - Electronic Rothamsted Archive, Rothamsted Research 
DB  - e-RA - the electronic Rothamsted Archive 
PY  - 2024 
DP  - Rothamsted Research, Harpenden, Herts, AL5 2JQ, UK. 
M3  - xlsx 
ET  - 1.0 
LA  - None 
UR  - https://doi.org/10.23637/wrn12-FYM-1 
DO  - 10.23637/wrn12-FYM-1 
AU  - Glendining, Margaret 
AU  - Gregory, Andy 
AU  - Poulton, Paul 
AU  - Wilmer, Wendy 
KW  - farmyard manure, nitrogen content, phosphorous, Rothamsted Research, straw, compost, peat, 
AB  - Details of the amounts and chemical composition of the organic manures and other amendments applied to the Woburn Organic Manuring Experiment, 1965-2019. Organic manures (farmyard manure (FYM), peat, compost, straw, cover crops and green manure) were applied in three phases: 1966-1971; 1981-1986; 2003 onwards. Grass and grass/clover leys (short-term grassland) were also included as treatments 1965-1972; and 1979-1987.  The leys were incorporated (ploughed in) at the end of each phase. Permanent grass/clover has been included as a treatment since 2003, but has not been incorporated in this phase of the experiment.  Arable crops were grown in the intervening years to assess the effects of the different organic amendments. 





This dataset provides details of the amounts of the manures applied and of their chemical composition: % total N, P, K, Ca, Mg, Na and S, and the total amount of each element applied (kg/ha). %C data is available for FYM, and % organic matter in FYM, peat and straw, 1966-1971.  %N data is available for the green manure, and grass and grass/clover leys sown in 1965 and incorporated in 1971/1972. Data is available for boron in FYM, peat and straw, 1966-1971, and trace elements in FYM and straw, 1981-1983 (Fe, Mn, Zn, Cu, Ni, Co, Cd and Pb). No data is available for the cover crops grown since 2003, or grass/clover sown in 1979 and 2003.





The FYM (25t/ha) supplies on average 189 kgN/ha, 42 kgP/ha and 215 kgK/ha; the straw (7.5t/ha) 37 kgN/ha, 4 kgP/ha and 67 kgK/ha. For comparison, the standard inorganic fertilizer treatments on the Woburn Organic Manuring experiment since 2003 supply 0-250 kgN/ha, 20 kgP/ha and 83 kgK/ha.  
ER  -