The yields were generally low which might partly be attributed to the relative dry weather conditions during the trials. On all soils investigated, yield responses to phosphate application were high. On loamy soils there was sometimes a response to nitrogen and on sandy soils to potassium. Yields on sands were lower than on loamy sands and sandy loams. The most important yield determining soil factor proved to be organic matter. On compacted soils yields were considerably lower which was due to increased mechanical impedance for root growth and in some cases to inadequate aeration.