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California Agriculture, Vol. 12, No.9

Heavy irrigation treatment for leaf scorch
September 1958
Volume 12, Number 9

Research articles

Development of prune harvester: New pickup principle improves machine designed to harvest French prunes from ground after removal from tree by shaking
by R. B. Fridley, P. A. Adrian
| Full text HTML  | PDF  
A basic analysis of various pickup principles applied in the construction of prune harvesters was made during the spring of 1957 to develop—if possible—a gentle method of fruit pickup which would simulate hand picking and give a positive pickup without disturbing the soil surface.
A basic analysis of various pickup principles applied in the construction of prune harvesters was made during the spring of 1957 to develop—if possible—a gentle method of fruit pickup which would simulate hand picking and give a positive pickup without disturbing the soil surface.
Sodium leaf scorch of apricot: Condition causing damage to orchards in Hemet area improved by heavy irrigation treatments with contour basin checks
by Dean D. Halsey, N. L. McFarlane, Richard J. Schut
| Full text HTML  | PDF  
Salting out, or dieback—sodium scorch—of apricot was improved substantially—in an experimental plot near Hemet—by the heavy application of irrigation water as a corrective treatment.
Salting out, or dieback—sodium scorch—of apricot was improved substantially—in an experimental plot near Hemet—by the heavy application of irrigation water as a corrective treatment.
Apricot irrigation studies: Consumptive use of water by trees and soil salinity control experiment conducted in western Stanislaus County orchards
by Clyde E. Houston, Jewell L. Meyer
| Full text HTML  | PDF  
Excess water added to apricot orchards irrigated with San Joaquin River water—in Stanislaus County—removes accumulated salts and maintains a favorable salt balance in the soil.
Excess water added to apricot orchards irrigated with San Joaquin River water—in Stanislaus County—removes accumulated salts and maintains a favorable salt balance in the soil.
Soil salinity hazard to seeds: Planting variation to minimize salinity to germinating seeds successful in field tests with alfalfa in Palo Verde Valley
by Lloyd Burri, Milton Fireman, Otis A. Harvey
| Full text HTML  | PDF  
A perfect stand of Moapa alfalfa in an experimental offset planting—a single row on the shoulder of double row beds—was obtained in an area where soil salinity usually is a hazard to germinating seeds.
A perfect stand of Moapa alfalfa in an experimental offset planting—a single row on the shoulder of double row beds—was obtained in an area where soil salinity usually is a hazard to germinating seeds.
Asparagus irrigation studies: Evidence indicates asparagus on sedimentary soil can utilize about 20″ of irrigation in addition to a normal 16″ rainfall
by G. C. Hanna, L. D. Doneen
| Full text HTML  | PDF  
Frequency of irrigation in relation to yield of asparagus on sedimentary soil was the subject of an eight-year experiment at Davis.
Frequency of irrigation in relation to yield of asparagus on sedimentary soil was the subject of an eight-year experiment at Davis.
Nematodes and bacteria on rose: Root-lesion nematode and hairy-root bacterium on important rose crop in southern California controlled by treatments
by S. A. Sher, D. E. Munnecke
| Full text HTML  | PDF  
Two limiting factors in the $4 million field grown rose bush crop of southern California are root-lesion and hairy-root diseases.
Two limiting factors in the $4 million field grown rose bush crop of southern California are root-lesion and hairy-root diseases.
Gibberellin on orange fruit: Content of ascorbic acid, hydrogen ion and juice increased while rind color, thickness and texture coarseness decreased
by C. W. Coggins, H. Z. Hield
| Full text HTML  | PDF  
To evaluate the influence of gibberellin on citrus fruit development and quality—and other tree responses—Thompson Improved Navel Oranges were treated with potassium gibberellate during the first week of November 1957. Oranges 2.5″-2.6″ in diameter were individually-dipped along with four subtending leaves in the treatment solutions. Concentrations of technical gibberellin—containing approximately 82% potassium gibberellate—used were 500, 1,000, and 2,000 ppm—parts per million. A non-ionic wetting agent was added at 0.05%. Oranges which served as controls were selected for size but were not treated. A randomized complete block design with eight replications was used. Each plot consisted of three trees with 17 test oranges on each.
To evaluate the influence of gibberellin on citrus fruit development and quality—and other tree responses—Thompson Improved Navel Oranges were treated with potassium gibberellate during the first week of November 1957. Oranges 2.5?-2.6? in diameter were individually-dipped along with four subtending leaves in the treatment solutions. Concentrations of technical gibberellin—containing approximately 82% potassium gibberellate—used were 500, 1,000, and 2,000 ppm—parts per million. A non-ionic wetting agent was added at 0.05%. Oranges which served as controls were selected for size but were not treated. A randomized complete block design with eight replications was used. Each plot consisted of three trees with 17 test oranges on each.
Defoliation for early pruning Bartlett: Pears defoliated without tree injury by application of caustic dust in tests on most efficient use as defoliant
by W. H. Griggs
| Full text HTML  | PDF  
The principal ingredient of a lime nitrogen fertilizer—calcium cyanamide—has initial toxic or caustic properties, in the presence of moisture, that cause plant leaves to absciss.
The principal ingredient of a lime nitrogen fertilizer—calcium cyanamide—has initial toxic or caustic properties, in the presence of moisture, that cause plant leaves to absciss.
Rootstock effect on olive: Influence on tree growth is found to vary with the scion variety in tests conducted at Winters, Corning, and Lindsay
by H. T. Hartmann
| Full text HTML  | PDF  
In experimental olive plantings—using three scion varieties and 12 different rootstocks—the principal rootstock effect on the scion variety was in tree vigor. However, any rootstock influence noted in a given scion-rootstock combination did not necessarily hold true for another scion variety on the same rootstock.
In experimental olive plantings—using three scion varieties and 12 different rootstocks—the principal rootstock effect on the scion variety was in tree vigor. However, any rootstock influence noted in a given scion-rootstock combination did not necessarily hold true for another scion variety on the same rootstock.
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California Agriculture, Vol. 12, No.9

Heavy irrigation treatment for leaf scorch
September 1958
Volume 12, Number 9

Research articles

Development of prune harvester: New pickup principle improves machine designed to harvest French prunes from ground after removal from tree by shaking
by R. B. Fridley, P. A. Adrian
| Full text HTML  | PDF  
A basic analysis of various pickup principles applied in the construction of prune harvesters was made during the spring of 1957 to develop—if possible—a gentle method of fruit pickup which would simulate hand picking and give a positive pickup without disturbing the soil surface.
A basic analysis of various pickup principles applied in the construction of prune harvesters was made during the spring of 1957 to develop—if possible—a gentle method of fruit pickup which would simulate hand picking and give a positive pickup without disturbing the soil surface.
Sodium leaf scorch of apricot: Condition causing damage to orchards in Hemet area improved by heavy irrigation treatments with contour basin checks
by Dean D. Halsey, N. L. McFarlane, Richard J. Schut
| Full text HTML  | PDF  
Salting out, or dieback—sodium scorch—of apricot was improved substantially—in an experimental plot near Hemet—by the heavy application of irrigation water as a corrective treatment.
Salting out, or dieback—sodium scorch—of apricot was improved substantially—in an experimental plot near Hemet—by the heavy application of irrigation water as a corrective treatment.
Apricot irrigation studies: Consumptive use of water by trees and soil salinity control experiment conducted in western Stanislaus County orchards
by Clyde E. Houston, Jewell L. Meyer
| Full text HTML  | PDF  
Excess water added to apricot orchards irrigated with San Joaquin River water—in Stanislaus County—removes accumulated salts and maintains a favorable salt balance in the soil.
Excess water added to apricot orchards irrigated with San Joaquin River water—in Stanislaus County—removes accumulated salts and maintains a favorable salt balance in the soil.
Soil salinity hazard to seeds: Planting variation to minimize salinity to germinating seeds successful in field tests with alfalfa in Palo Verde Valley
by Lloyd Burri, Milton Fireman, Otis A. Harvey
| Full text HTML  | PDF  
A perfect stand of Moapa alfalfa in an experimental offset planting—a single row on the shoulder of double row beds—was obtained in an area where soil salinity usually is a hazard to germinating seeds.
A perfect stand of Moapa alfalfa in an experimental offset planting—a single row on the shoulder of double row beds—was obtained in an area where soil salinity usually is a hazard to germinating seeds.
Asparagus irrigation studies: Evidence indicates asparagus on sedimentary soil can utilize about 20″ of irrigation in addition to a normal 16″ rainfall
by G. C. Hanna, L. D. Doneen
| Full text HTML  | PDF  
Frequency of irrigation in relation to yield of asparagus on sedimentary soil was the subject of an eight-year experiment at Davis.
Frequency of irrigation in relation to yield of asparagus on sedimentary soil was the subject of an eight-year experiment at Davis.
Nematodes and bacteria on rose: Root-lesion nematode and hairy-root bacterium on important rose crop in southern California controlled by treatments
by S. A. Sher, D. E. Munnecke
| Full text HTML  | PDF  
Two limiting factors in the $4 million field grown rose bush crop of southern California are root-lesion and hairy-root diseases.
Two limiting factors in the $4 million field grown rose bush crop of southern California are root-lesion and hairy-root diseases.
Gibberellin on orange fruit: Content of ascorbic acid, hydrogen ion and juice increased while rind color, thickness and texture coarseness decreased
by C. W. Coggins, H. Z. Hield
| Full text HTML  | PDF  
To evaluate the influence of gibberellin on citrus fruit development and quality—and other tree responses—Thompson Improved Navel Oranges were treated with potassium gibberellate during the first week of November 1957. Oranges 2.5″-2.6″ in diameter were individually-dipped along with four subtending leaves in the treatment solutions. Concentrations of technical gibberellin—containing approximately 82% potassium gibberellate—used were 500, 1,000, and 2,000 ppm—parts per million. A non-ionic wetting agent was added at 0.05%. Oranges which served as controls were selected for size but were not treated. A randomized complete block design with eight replications was used. Each plot consisted of three trees with 17 test oranges on each.
To evaluate the influence of gibberellin on citrus fruit development and quality—and other tree responses—Thompson Improved Navel Oranges were treated with potassium gibberellate during the first week of November 1957. Oranges 2.5?-2.6? in diameter were individually-dipped along with four subtending leaves in the treatment solutions. Concentrations of technical gibberellin—containing approximately 82% potassium gibberellate—used were 500, 1,000, and 2,000 ppm—parts per million. A non-ionic wetting agent was added at 0.05%. Oranges which served as controls were selected for size but were not treated. A randomized complete block design with eight replications was used. Each plot consisted of three trees with 17 test oranges on each.
Defoliation for early pruning Bartlett: Pears defoliated without tree injury by application of caustic dust in tests on most efficient use as defoliant
by W. H. Griggs
| Full text HTML  | PDF  
The principal ingredient of a lime nitrogen fertilizer—calcium cyanamide—has initial toxic or caustic properties, in the presence of moisture, that cause plant leaves to absciss.
The principal ingredient of a lime nitrogen fertilizer—calcium cyanamide—has initial toxic or caustic properties, in the presence of moisture, that cause plant leaves to absciss.
Rootstock effect on olive: Influence on tree growth is found to vary with the scion variety in tests conducted at Winters, Corning, and Lindsay
by H. T. Hartmann
| Full text HTML  | PDF  
In experimental olive plantings—using three scion varieties and 12 different rootstocks—the principal rootstock effect on the scion variety was in tree vigor. However, any rootstock influence noted in a given scion-rootstock combination did not necessarily hold true for another scion variety on the same rootstock.
In experimental olive plantings—using three scion varieties and 12 different rootstocks—the principal rootstock effect on the scion variety was in tree vigor. However, any rootstock influence noted in a given scion-rootstock combination did not necessarily hold true for another scion variety on the same rootstock.

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