California Agriculture
California Agriculture
California Agriculture
University of California
California Agriculture

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California Agriculture, Vol. 5, No.3

Use of fire as a tool in land clearing
March 1951
Volume 5, Number 3

Research articles

New planter for range seeding: Drill-type planter developed for seeding rolling hill grazing land without seed bed preparation
by D. C. Sumner, R. A. Kepner
| Full text HTML  | PDF  
Not available – first paragraph follows: A new drill-type planter makes it possible to seed forage plants on rolling open hill grazing land without seed bed preparation.
Not available – first paragraph follows: A new drill-type planter makes it possible to seed forage plants on rolling open hill grazing land without seed bed preparation.
Spider mite control: Acaricides show selectivity on apples and pears in northern California
by Arthur D. Borden, Harold F. Madsen
| Full text HTML  | PDF  
Not available – first paragraph follows: Control of spider mites attacking the foliage of apples and pears is one of the most important pest control problems that confronts the northern California orchardist. Though much attention has been given to this problem by field research men and many new acaricides have been available for field tests, a satisfactory control has not been obtained in many orchards.
Not available – first paragraph follows: Control of spider mites attacking the foliage of apples and pears is one of the most important pest control problems that confronts the northern California orchardist. Though much attention has been given to this problem by field research men and many new acaricides have been available for field tests, a satisfactory control has not been obtained in many orchards.
Walnut blight: Three compounds found effective in prebloom-postbloom spray program
by Peter A. Ark, C. Emlen Scott
| Full text HTML  | PDF  
Not available – first paragraph follows: Walnut blight causes up to 60% loss of nuts–in some sections of California.
Not available – first paragraph follows: Walnut blight causes up to 60% loss of nuts–in some sections of California.
Lemon response to phosphate: Substantial increase in yield of lemons followed application of phosphate in trials in two counties
by D. G. Aldrich, J. J. Coony
| Full text HTML  | PDF  
Not available – first paragraph follows: Part II of a two-part progress report. Part I of this progress report, published in the February 1951 issue of California Agriculture, described the marked improvement observed in the vegetative characteristics of lemon trees receiving soil applications of phosphate fertilizer in field trials in Ventura and in San Diego counties in 1949–50.
Part II of a two-part progress report. Part I of this progress report, published in the February 1951 issue of California Agriculture, described the marked improvement observed in the vegetative characteristics of lemon trees receiving soil applications of phosphate fertilizer in field trials in Ventura and in San Diego counties in 1949–50.
Use of fire in land clearing: Controlled burns by planned application and confinement of fire to preselected wildland area a tool of many uses
by Keith Arnold, L. T. Burchai, Ralph L. Fenner, R. F. Grah
| Full text HTML  | PDF  
Not available – first paragraph follows: The first of five articles reporting the findings in investigations in the effectiveness, the safety and the cost of the use of controlled burning as a tool for land clearing. No attempt is made to provide one formula for prescribed burning in California; each fire is an individual case to be planned on the ground.
Not available – first paragraph follows: The first of five articles reporting the findings in investigations in the effectiveness, the safety and the cost of the use of controlled burning as a tool for land clearing. No attempt is made to provide one formula for prescribed burning in California; each fire is an individual case to be planned on the ground.
Nitrogen sprays: Tests reported with fertilizer containing 44% organic nitrogen
by E. L. Proebsting
| Full text HTML  | PDF  
Not available – first paragraph follows: The use of a spray to supply nitrogen to the aboveground parts of trees was re-examined in 1950 because of the results obtained by various investigators in other states.
Not available – first paragraph follows: The use of a spray to supply nitrogen to the aboveground parts of trees was re-examined in 1950 because of the results obtained by various investigators in other states.
Olive tree spacing: Studies indicate wide spacing of trees advantageous to yields
by Karl Opitz, H. T. Hartmann
| Full text HTML  | PDF  
Not available – first paragraph follows: Olive trees in the outside rows of orchards or in border row planting generally outyield trees growing in solid block plantings. This is believed to result from less root and top competition. Compared with the solid block plantings, border row trees are better illuminated and die roots spread into areas where such essentials as water and soil nutrients are more readily available.
Not available – first paragraph follows: Olive trees in the outside rows of orchards or in border row planting generally outyield trees growing in solid block plantings. This is believed to result from less root and top competition. Compared with the solid block plantings, border row trees are better illuminated and die roots spread into areas where such essentials as water and soil nutrients are more readily available.
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California Agriculture, Vol. 5, No.3

Use of fire as a tool in land clearing
March 1951
Volume 5, Number 3

Research articles

New planter for range seeding: Drill-type planter developed for seeding rolling hill grazing land without seed bed preparation
by D. C. Sumner, R. A. Kepner
| Full text HTML  | PDF  
Not available – first paragraph follows: A new drill-type planter makes it possible to seed forage plants on rolling open hill grazing land without seed bed preparation.
Not available – first paragraph follows: A new drill-type planter makes it possible to seed forage plants on rolling open hill grazing land without seed bed preparation.
Spider mite control: Acaricides show selectivity on apples and pears in northern California
by Arthur D. Borden, Harold F. Madsen
| Full text HTML  | PDF  
Not available – first paragraph follows: Control of spider mites attacking the foliage of apples and pears is one of the most important pest control problems that confronts the northern California orchardist. Though much attention has been given to this problem by field research men and many new acaricides have been available for field tests, a satisfactory control has not been obtained in many orchards.
Not available – first paragraph follows: Control of spider mites attacking the foliage of apples and pears is one of the most important pest control problems that confronts the northern California orchardist. Though much attention has been given to this problem by field research men and many new acaricides have been available for field tests, a satisfactory control has not been obtained in many orchards.
Walnut blight: Three compounds found effective in prebloom-postbloom spray program
by Peter A. Ark, C. Emlen Scott
| Full text HTML  | PDF  
Not available – first paragraph follows: Walnut blight causes up to 60% loss of nuts–in some sections of California.
Not available – first paragraph follows: Walnut blight causes up to 60% loss of nuts–in some sections of California.
Lemon response to phosphate: Substantial increase in yield of lemons followed application of phosphate in trials in two counties
by D. G. Aldrich, J. J. Coony
| Full text HTML  | PDF  
Not available – first paragraph follows: Part II of a two-part progress report. Part I of this progress report, published in the February 1951 issue of California Agriculture, described the marked improvement observed in the vegetative characteristics of lemon trees receiving soil applications of phosphate fertilizer in field trials in Ventura and in San Diego counties in 1949–50.
Part II of a two-part progress report. Part I of this progress report, published in the February 1951 issue of California Agriculture, described the marked improvement observed in the vegetative characteristics of lemon trees receiving soil applications of phosphate fertilizer in field trials in Ventura and in San Diego counties in 1949–50.
Use of fire in land clearing: Controlled burns by planned application and confinement of fire to preselected wildland area a tool of many uses
by Keith Arnold, L. T. Burchai, Ralph L. Fenner, R. F. Grah
| Full text HTML  | PDF  
Not available – first paragraph follows: The first of five articles reporting the findings in investigations in the effectiveness, the safety and the cost of the use of controlled burning as a tool for land clearing. No attempt is made to provide one formula for prescribed burning in California; each fire is an individual case to be planned on the ground.
Not available – first paragraph follows: The first of five articles reporting the findings in investigations in the effectiveness, the safety and the cost of the use of controlled burning as a tool for land clearing. No attempt is made to provide one formula for prescribed burning in California; each fire is an individual case to be planned on the ground.
Nitrogen sprays: Tests reported with fertilizer containing 44% organic nitrogen
by E. L. Proebsting
| Full text HTML  | PDF  
Not available – first paragraph follows: The use of a spray to supply nitrogen to the aboveground parts of trees was re-examined in 1950 because of the results obtained by various investigators in other states.
Not available – first paragraph follows: The use of a spray to supply nitrogen to the aboveground parts of trees was re-examined in 1950 because of the results obtained by various investigators in other states.
Olive tree spacing: Studies indicate wide spacing of trees advantageous to yields
by Karl Opitz, H. T. Hartmann
| Full text HTML  | PDF  
Not available – first paragraph follows: Olive trees in the outside rows of orchards or in border row planting generally outyield trees growing in solid block plantings. This is believed to result from less root and top competition. Compared with the solid block plantings, border row trees are better illuminated and die roots spread into areas where such essentials as water and soil nutrients are more readily available.
Not available – first paragraph follows: Olive trees in the outside rows of orchards or in border row planting generally outyield trees growing in solid block plantings. This is believed to result from less root and top competition. Compared with the solid block plantings, border row trees are better illuminated and die roots spread into areas where such essentials as water and soil nutrients are more readily available.

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