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In the dry growing seasons 1964, 1965 and 1966, irrigation experiments of spring cereals were carried out on clay soils in Southern Finland. The results of the investigations concerning the technique of sprinkler irrigation and the soil moisture conditions have been published in the first part (Elonen, Nieminen and Kara 1967). The present paper will report the results of sprinkler irrigation on the grain yield. Attention has been paid to the importance of the date of irrigation, the crop, the amount of fertilizers and the placement of fertilizers.

Sprinkler irrigation on clay soils in southern Finland II. Effect on the grain yield of spring yereals