Changes in the nitrate and sulfate content of the soil solution under orchard conditions
AuthorE. L. Proebsting
Author AffiliationsE. L. Proebsting was Assistant Professor of Pomology and Assistant Pomologist in the Experiment Station.
Hilgardia 4(2):57-76. DOI:10.3733/hilg.v04n02p057. April 1929.
Abstract does not appear. First page follows.
In 1922, the Division of Pomology of the California Agricultural Experiment Station began an investigation on the maintenance of soil fertility in deciduous orchards. For this purpose a field of approximately twelve acres was selected and half of it planted to deciduous fruit trees. This will hereafter be referred to as block A. The following year, 1923, the other half was set out. It will be designated block B. The soil in the field selected varied from a fine sandy loam to a loam of the Yolo series. The water table stood at approximately sixteen feet. The entire volume of soil above the water table was in horizon A. There were some slight modifications in texture before that depth was reached, but neither gravel nor clay was found.
Crop History of the Field Used
The crop history of this field before the planting of the orchard is of interest.† In the summer of 1908, this area was levelled for alfalfa irrigation. Previous to this time it had been in grain for an indefinite period, probably about fifty years. In the spring of 1909, it was planted to alfalfa. From 1909 to 1913, there is no available record as to yields or irrigation frequency, but it is supposed that the entire area had essentially the same treatment.
 Burd John S., Martin J. C. Water displacement of soil and the soil solution. Jour. Agr. Sci. 1923. 13(3):265-295. DOI: 10.1017/S0021859600003579 [CrossRef]
 Burd John S., Martin J. C. Secular and seasonal changes in the soil solution. Soil Sci. 1924. 18:151-167. DOI: 10.1097/00010694-192408000-00009 [CrossRef]
 Burd John S. Relation of biological processes to cation concentrations in soils. Soil Sci. 1925. 20:269-283. DOI: 10.1097/00010694-192510000-00002 [CrossRef]
 Lyon T. L., Heinicke A. J., Wilson B. D. The relation of soil moisture and nitrates to the effects of sod on apple trees. New York (Cornell University) Agr. Exp. Sta., Memoir. 1923. 63:1-27.
Also in this issue:Poultry meat: Los Angeles market price-making efficiency slowed by decentralization
Tests on girdling olive trees: Indicate practice most effective when done in February before flower parts of the olive begin to develop
Rootstocks with dwarfing effect: Investigations indicate some citrus rootstocks exert dwarfing effect on scions budded to them
Fruit drop of lemons: 2,4-D and 2,4,5-T water sprays reduce mature fruit drop, with little effect on drop of immature fruit
Injections for citrus trees: Phosphorus and potassium given lemon trees by injections in experimental study of nutrient deficiencies
Air-carrier spray equipment: Economical and effective in applying concentrated spray mixtures
Selective weed killers: Character of crop plants and weeds must be known to determine proper chemical control methods
Breeding programs: Meaning and significance of heritability in improvement of strains through genetics
Dairy farm management: Production efficiency in California highest in nation but state is deficit in dairy products
Soybean meals as poultry feed: Soybean oil meals studied to determine effect of processing on nutritional value