Water retention curves for soils after Water Retainer application

Experimental data were collected to analyse the impact of the Water Retainer product on the soil water retention curve. Soil samples were taken from an arable field located in the village of Lubnów (Lower Silesian Voivodeship, Poland) as part of the WATERAGRI project. It was made on 3 different types of soils (based on the gravimetric composition) and 4 different dosage scenarios. The producer recommends to apply Water Retainer product on the field with a concentration of 10l of a product dissolved in the 1000 l for 1 ha. According to this recommendation, to assess the Water Retainer effect on soil water retention curve, the analysis was made for 4 different scenarios: a) Without Water Retainer b) 1dose of Water Retainer c) 3 doses of Water Retainer, d) 5 doses of Water Retainer. Doses of Water Retainer were planned with respect to a Three-level full factorial design, for a best statistical distribution. Soil samples were analysed in 2 experimental setups: a) 72 samples (4 scenarios * 3 soil samples * 6 repetitions) in 100 cm3 cylinder (20cm2 surface) for Sandbox pF Determination Machine from Eijkelkamp b) 36 samples (4 scenarios * 3 soil samples * 3 repetitions) in 250cm3 (50cm2 surface) cylinders for Hyprop 2.