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Alfalfa Yield and Composition After Different Times and Rates of Lime and Phosphorus Application
Author(s) -
Singh R. N.,
Seatz Lloyd F.
Publication year - 1961
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1961.03615995002500040023x
Subject(s) - lime , phosphorus , sowing , loam , yield (engineering) , acre , agronomy , soil water , chemistry , environmental science , soil science , geology , biology , materials science , paleontology , organic chemistry , metallurgy
Lime and phosphorus applications were made to a Hartsells loam soil with a pH of 4.7 and an extremely low available phosphorus supply. Lime rates of 0, 1, 2, and 4 tons per acre and P 2 O 5 rates of 0, 40, 80, and 120 pounds per acre were applied 3 months before planting and at planting in the four possible time‐of‐application combinations. Two crops of alfalfa were harvested and yield and P content were determined. Highly significant yield increases to both lime and phosphorus applications were found. The highest yield was obtained when the highest rates of lime and phosphorus were both applied at the time of planting. Phosphorus applications to the unlimed soil were not as effective, even though the soil was limed 3 months after the phosphorus was applied, as when the phosphorus was applied to the limed soil. These results indicate that the rate of equilibrium of phosphorus compound formation in soils at different pH levels may occur very slowly.