Germination of seeds from carrot, lettuce, and pepper plants grown under severe nutrient deficiencies
AuthorJames F. Harrington
Author AffiliationsJames F. Harrington was Professor of Vegetable Crops and Olericulturist in the Experiment Station, Davis.
Hilgardia 30(7):219-235. DOI:10.3733/hilg.v30n07p219. October 1960.
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Plants of carrot, lettuce, and pepper were grown in sand cultures receiving either a complete nutrient solution or one deficient in N, P, K, or Ca. An effort was made to produce severe deficiency, but not to a point at which no seeds would be produced.
Plants showed various deficiency symptoms, including necrosis of the growing tips, with calcium deficiency, and necrotic spots along the leaf margins in the case of potassium deficiency.
Seed yields were always depressed by low N, P, K, or Ca treatments. Percentage of normal seeds was depressed by low N, K, or Ca, but not by low P.
At harvest, seeds from low Nand P treatments usually showed the same germination as that of seeds receiving complete solution. However, K deficiency resulted in lower germination in some experiments, as did Ca deficiency in carrots and peppers.
In storage, seeds from low K and Ca treatments declined in germination faster than did seeds from the complete-solution treatments.
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Also in this issue:A salute to Hopland
Facts about the Hopland field station
Building a research program: 1951--1976
Extending the knowledge
Wildlife research is diverse, productive
Coyote is chief predator
Deer studey yields management clues
Fertility studies reveal plant & soil needs
Watershed management increases rangeland productivity
Vegetation changes produce benefits
Brush management facts
Sheep research stresses management, nutrition, and breeding