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Long‐time Effect of Applying Barnyard Manure at Varied Rates on Crop Yield and Some Chemical Constituents of the Soil 1
Author(s) -
Brage B. L.,
Thompson M. J.,
Caldwell A. C.
Publication year - 1952
Publication title -
agronomy journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.752
H-Index - 131
eISSN - 1435-0645
pISSN - 0002-1962
DOI - 10.2134/agronj1952.00021962004400010006x
Subject(s) - agricultural experiment station , crop , manure , citation , yield (engineering) , library science , agricultural science , agriculture , horticulture , mathematics , agronomy , environmental science , history , computer science , biology , archaeology , physics , thermodynamics
O VER 100 years have passed since the first long-time fertility experiments at Rothamsted were begun. Many similar investigations have been in effect in the United States, but all have been of shorter duration. Rate of manuring plots have been in operation for 30 years at the Northeast Experiment Station, Duluth, Minn. It is the purpose of this paper to present the yields of different crops as they have been affected by different rates of manuring and also to present the effect of manure on various soil constituents.