De Sangosse has launched a Phosphate Stewardship Guide. Developed in collaboration with ADAS, the guide brings together research, field data and practical agronomy to address what is widely regarded as a challenge across UK cropping systems. “The limiting factor is not supply, it is availability,” says De Sangosse commercial technical manager Rob Suckling. “We know when phosphate is applied to most soils, it is very quickly fixed into a biologically unavailable form limiting uptake and efficiency.” Of all the macronutrients, phosphate is considered the most immobile. “Increasingly, it is being recognised that it isn’t insufficient phosphate in soils; it’s the…