Agricultural Experiment Station, School of Agriculture and Land Resources Management, University of Alaska
Abstract
During 1979 and 1980, soil fertility research was conducted at two locations in the Delta
Clearwater area. One of the test sites, Lee F ett’s Farm, was cleared in the mid-1950s and has been in production for about 25 years. The other test site is situated on a tract of newly cleared
land owned by Dennis Green. The new lands site was cleared by the traditional berm-pile method during the winter of 1978-79. This method removes much of the moss layer, and in some cases,
part o f the topsoil. Land cleared by this procedure is lower in natural fertility, but has the advantage
of enabling the farmer to plant a crop the first summer after clearing.
In this publication, progress reports are given for several research projects involving fertilizer use and rates of application.Introduction -- Weather Summary for the 1979 and 1980 Growing Season: Table 1: Climatic Data for Delta Junction During the 1979 and 1980 Growing Season -- Response of Barley to Nitrogen and Phosphorus Fertilizer Applications on New Land:
Table 2: Response of Barley to Nitrogen and Phosphorus Fertilizers on New Land
in the Delta-Clearwater Area of Alaska -- Variety-Fertilizer Interactions of Barley Grown on Newly Cleared Land: Table 3: Variety-Fertilizer Interactions of Barley Grown on New Land in the Delta-Clearwater Area of Alaska -- Response of Barley and Rapeseed to Sulfur Fertilization: Table 4: Response of Barley to Sulfur Fertilization When Grown Under
Different Crop Rotations; Table 5: Response of Sulfur Fertilization When Grown Under Different Crop Rotation
