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Responses of Orchard Grass—Ladino Clover to Irrigation and Nitrogen Fertilization 1
Author(s) -
Robinson R. R.,
Sprague V. G.
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/agronj1952.00021962004400050005x
Subject(s) - orchard , irrigation , pasture , forage , agronomy , environmental science , agricultural science , biology
The investigation was conducted on Hagerstown silt loam. The plowed layer on the experimental area averages 9 inches in depth. Reddish brown clay subsoil occurs usually at a depth of about 15 inches with an intermediate As or Bi layer at a depth of 9 to about 15 inches. The available water holding capacity of the soil on a volume basis is 20% for the top-soil and 10% for the subsoil. An experiment involving two levels each of soil moisture and nitrogen fertilization and two clipping treatments in a factorial design was established in the spring of 1947 on a 3-year-old sod of orchard grass-Ladino clover. Natural rainfall with and without irrigation provided the two levels of soil moisture. Nitrogen levels were no nitrogen fertilization and a high level of nitrogen maintained by applying ammonium nitrate at the rate of 60 pounds per acre of nitrogen in the early spring (80 pounds on plots to be cut for hay) and 40 pounds after each cutting except the last one in the fall. The total amount of nitrogen aver-" aged 220 pounds per acre per year on the nonirrigated block and