Abstract

The purpose of the experiment was to determine long-term fertilization and the effects of weather on the soil properties and spring barley yields A long-term field experiment with crop rotations of potatoes hemp oil from 2017 spring barley spring barley with red clover undersown and red clover was established in 1960 Kuusiku Estonia Different barley varieties was used over the experimental period With except the spring barley variety Anni which was tested from 1995 2019 The experiment has three fertilizer treatments the moderate dose of fertilization NPK1 double NPK1 NPK2 and moderate fertilization with farmyard manure NPK1 FYM After harvest the soil samples were collected from 0 0 2 m of topsoil and 0 2 0 4 m of subsoil from each plot using a soil drill