1. Integration of fodder legumes into rice-based cropping system in Bangladesh: production of Lathyrus sativus and its use as a supplement to straw based rations of dairy cows. Asian-Aust;Akbar;J. Anim. Sci.,2000
2. Official methods of analysis;AOAC,1999
3. A simple method of determination of ammonium in semimicro-Keldahl analysis of soils and plant materials using a block digester;Bremner;Commun. Soil Sci. Plant Anal.,1983
4. Iron induced copper deficiency in calves: dose–response relationships and interactions with molybdenum and sulfur;Bremner;Anim. Prod.,1987
5. ChemLab Instruments Ltd., Continuous Flow Analysis, 1981. Method sheet No.CW2-008-17 and No. W2-075-01, Horn Church, Essex, UK.