Back to profile profile_subnav_projects - ir. PAI (Phillip) Ehlert Projects by PAI Ehlert P-recovery As a result of the tightening of the manure policy in the 4th Action Programme of the Nitrates Directive, less phosphate can be placed on agricultural... Protocol Phosphate condition Within this project, a protocol will be drafted that allows the phosphate status of agricultural soil to be determined.. With this information, the... Classification of phosphate categories The agricultural and environmental consequences of the change in the classification of phosphate categories are mapped in this project. Admission of struvite as category in the Fertilizer Act Phosphate recovery from manure can be regarded as an important contribution to the control of decreasing global phosphate resources. This research... Relation between plant available soil phosphorus and phosphorus fertilisation The European Commission decided that only balanced fertilisation is allowed. This means the supply of phosphate is equal to the drain of phosphate.... BIOCHAR - Climate saving soils Biochar is a byproduct of the pyrolysis. It is a stable form of carbon which supposedly has a large number of positive characteristics for the soil.