“The bulk of my milk is produced from 30 hectares of irrigated pasture watered from the Wellington weir. The weir water has very high salt levels of around 1200 ppm. This gives us an annual estimated application of 2.4 tonnes of sodium and 700 kgs of magnesium per hectare mainly as chlorides. I do not feed supplements to the cows so it is critical that a large proportion of my pasture is made up of high quality clovers if I am to maintain milk production. I also do not apply nitrogen to the irrigated pastures because the clovers fix all the nitrogen needed for pasture growth. Just over half the paddocks are heavy clay and the rest alluvial river flats. Both soil types suffer greatly from the excessive magnesium applications, which have built up over 50 years of watering. SupaGyp is the perfect solution to our problem. The sulphur in the gypsum binds readily to the magnesium giving highly soluble magnesium sulphate (Epsom salts), which is washed into the ocean each winter and leaves the calcium behind to improve soil structure. The fine grain in SupaGyp gives a very fast response, easily seen in just a couple of weeks after application. We aim to spread around 5 tonnes per hectare in a single application each year which is sufficient to buffer against the next years salt application and a bit more to gradually unwind the damage done over previous decades. We are careful to only apply SupaGyp to freshly grazed pasture that then has plenty of time to form a canopy above the soil before the cows return. Our cows will readily eat the SupaGyp off the leaves of plants, which can be dangerous to their health when consumed in large amounts.”

Mike MacLaughlin – Dairy farmer, Brunswick Junction (Shire of Harvey)

 “Murdoch University has a 200-acre property on Mundijong Rd that acts as an agistment farm for the livestock at the South St campus. The soils are a loamy/clay and get very wet/boggy in winter. Over the past 3 years we have used Manna SupaGyp at 1t/ha and G-lime at 2t/ha and have seen fantastic results. The soils are now at the stage where the water disperses and annual pastures grow where they didn’t before.”

Kim Thomas – Farm Manager, Murdoch University