TY  - RPRT
TI  - Manure sampling procedures and nutrient estimation by the hydrometer method for gestation pigs.
AU  - Jun Zhu
AU  - Pius M Ndegwa
AU  - Zhijian Zhang
PY  - 2004
DO  - 10.1016/j.biortech.2003.09.010
UR  - https://pubmed.ncbi.nlm.nih.gov/14766157/
ID  - 14766157
ER  -