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Viruses and virus-like diseases affecting sweet potato subsistence farming in southern Tanzania
Sweet potato sweet potato virus disease NCM-ELISA incidence Tanzania
2009/3/3
A survey for sweet potato viruses was conducted in 32 farmer’s fields in Mbinga (20 fields) and Songea (12 fields) districts of the Ruvuma region in Southern Tanzania. Plants showing virus-like symp...
Annual and seasonal changes in mineral contents (Ca, Mg, P, K and Na) of grazed clover-grass mixtures in organic farming
organic farming dairy cows pastures Trifolium repens Trifolium pratense Trifolium hybridum herbage mineral concentrations calcium magnesium phosphorus potassium sodium
2006/3/31
A grazed field experiment was established in 1995 to evaluate alsike clover (Trifoliun hybridum L.), red clover (Trifolium pratense L.) and white clover (Trifolium repens L.) in clover-grass mixtures ...
Quantitative and qualitative evaluation of weed seed bank in organic farming
organic farming weed seed bank manure
2004/6/1
The influence of organic farming on weed seed bank under two different crop rotations: with and without manure, was investigated in an organic farm of Kazliskiai over the period of 1997–2002. Proven b...