High phosphorus for alfalfa: Plant analysis used to evaluate phosphorus status of alfalfa fields as guide to fertilizing for better yields and returns
AuthorsW. R. Sallee
W. E. Martin
B. A. Krantz
Authors AffiliationsW. R. Sallee is Farm Advisor, Tulare County, University of California; Albert Ulrich is Plant Physiologist in Soils and Plant Nutrition, University of California, Berkeley; W. E. Martin is Extension Soils Specialist, University of California, Davis; B. A. Krantz is Extension Soils Specialist, University of California, Davis.
Hilgardia 13(8):7-8. DOI:10.3733/ca.v013n08p7. August 1959.
Techniques of Field Sampling and Plant Analysis
A field of alfalfa should be divided into two or more segments of not over 20 acres each. Sampling should be done at one-tenth bloom or when one out of 10 plants has some open blossoms. Samples should be taken by walking across the center of the area collecting one complete stem of alfalfa at 35 different locations distributed at equal intervals. The mid-stem tissue is obtained by cutting out the middle third of the stem and stripping the leaves from it. Samples should be air dried or oven dried at 158°F and ground to pass a 40-mesh screen. Analysis for acid soluble phosphorus is made as described on page 49 of California Agricultural Experiment Station Bulletin 766. A free copy of Bulletin 766 may be obtained at the local Farm Advisor's Office or by a request sent to Agricultural Publications, 207 University Hall, University of California, Berkeley 4, California.
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Frost protection in peaches: New model under-tree wind machine tested with and without burners in orchard near Wheatland during winter of 1958–59
New winter rye: Productive winter annual cereal grain has high fertility in California tests
Lime effect on soil properties: Studies made on the effect of massive lime applications on physical properties of five types of Sacramento Valley soils
Rice water weevil: Beetle pest in rice growing areas of southern states discovered in California
Corn earworm in grain sorghum phosdrin and thiodan: Show promise as substitutes for DDT in two experiments with aerial applications to infested fields
Strip-treatment with chemicals: Satisfactory commercial control achieved in orange orchard program designed to conserve natural enemies of citrus pests
Subtropical insects: Reference on subtropical fruit pests and control measures now in one volume
Inclusions in guard cells of tobacco affected with mosaic
Phloem anatomy of tobacco affected with curly top and mosaic