Greenback "was founded in Singapore in the year 2007 to recycle large commercial volumes of organic agricultural and horticultural waste into valuable high quality organic fertilizer/compost. Using a unique fermentation and manufacturing process, it is able to recycle as much as 300 tons per day of organic waste. "
Wendell "stocks a wide range of fertilizers, soil amendments, agricultural chemicals, application equipment and other landscaping supplies needed by lawn & garden professionals for the incredible plant diversity found in Singapore farming, nurseries, gardens, turf and recreational parks."
One of the items in this bulleting looks at the reduction of phosphorus in the soil of vegetable farms with high phosphorus levels. It suggests stopping the use of fertilisers all together or using a low-phosphorus content fertiliser. This bulletin was published in 2007.
"Scientists from Nanyang Technological University (NTU) have invented a new toilet system that will turn human waste into electricity and fertilisers and also reduce the amount of water needed for flushing by up to 90 per cent compared to current toilet systems in Singapore."
" 'NewEarth', a lightweight, homogenous soil-like material containing plant nutrients that can be formulated into fillers for concrete or fertilizer of soil conditioner for plant cultivation presents exciting opportunities for the waste management industry"
'Agro Genesis' is a Singaporean firm that has come up with an alternative to common fertilisers. This 2010 article explains how the company is field-testing Miracle Sweet, an environmentally-friendly fertiliser that not only cuts wastage but also substantially increases crop yield.