Premium
Effect of Fertilization on Yields and Nutrient Content of Barley
Author(s) -
Carlson C. W.,
Grunes D. L.
Publication year - 1958
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/sssaj1958.03615995002200020013x
Subject(s) - loam , phosphorus , human fertilization , horizon , agronomy , fertilizer , nitrogen , nutrient , chemistry , potassium , zoology , soil horizon , environmental science , soil water , mathematics , soil science , biology , geometry , organic chemistry
The fertility status of the A 1p , AC, and C 1 horizons, and of mixtures of horizons A 1p and C 1 , of a Gardena loam was evaluated in a controlled light‐temperature plant‐growth chamber. Barley growth was greatest on the A 1p horizon at all fertilizer levels. Applications of nitrogen fertilizer increased yields on all horizons, but phosphorus additions did not. When both N and P were added, yields were greater on all horizons than when either was added alone. Fertilization with minor elements increased yields on the AC horizon while potassium sulfate increased yields on the C 1 horizon. In mixtures of horizons A 1p and C 1 , and at all N and P rates, yields increased as the percentage A 1p increased. Total nitrogen in plant tops grown on horizons AC and C 1 was similar, but less than that in plant tops grown on the A 1p horizon. Total phosphorus absorbed was less for plants grown on the C 1 horizon than for plants grown on the A 1p horizon. In the presence of added nitrogen, amounts of total phosphorus absorbed from the AC horizon were similar to amounts absorbed from the C 1 horizon at the lower P rates, and from the A 1p horizon at the high P rate. Yield increases observed on the nitrogen treatments, with increasing percentage of the A 1p horizon in the mixtures, were due in large part to the greater phosphorus availability of the A 1p horizon. There was a tendency for the addition of C 1 soil to decrease the availability of fertilizer phosphorus to plants.