California Agriculture
California Agriculture
California Agriculture
University of California
California Agriculture

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California Agriculture, Vol. 19, No.5

Research on systemics for integrated pest control program in cotton involves workers in the field, greenhouse, laboratory, and office.
May 1965
Volume 19, Number 5

Research articles

Irrigation for Nursery Container Plants: Tensiometers, automatic timing for sprinkler control
by F. K. Aljibury, W. M. Tomlinson, C. E. Houston
| Full text HTML  | PDF  
Automatic sprinkler irrigation for nursery container plants—using tensiometers to determine water needs and an automatic clock system—can result in reduced labor and water costs, more efficient irrigation, and less worry for the operator. This report compares three methods of watering: manual irrigation with a drag hose, a manually operated sprinkler system, and the automatic system.
Irrigation for nursery container plants…: Plastic Tube Irrigators with Electric Control
by N. W. Stice, L. J. Booher
| Full text HTML  | PDF  
Large container-grown plants can be irrigated and fertilized by using nine 1/8-inch-diameter plastic tubes radiating from a central riser. Each master unit of the system is operated by a clock-controlled 3-inch valve and is capable of irrigating 720 containers simultaneously in five minutes. Four of the units now operating at a Sacramento nursery, where this study was conducted, can irrigate 2,880 containers in 20 minutes.
Frequent Irrigation Detrimental For Mechanically–Harvested: Tomatoes
by J. C. Lingle, R. M. Hagan, W. J. Flocker, P. E. Martin
| Full text HTML  | PDF  
frequent irrigation, the usual man- agement practice in the production of hand-picked tomatoes, is not necessarily best suited for the new varieties developed for one-time mechanical harvesting. In addition to the need for determinate maturity, dry fields allow much more efficient operation of mechanical harvesting equipment. These studies were conducted to determine how dry the soil can become before affecting yield, maturity, and soluble solids content of the new varieties-and whether a plant or soil moisture index can be developed as a guide to irrigation of the growing crop, as well as the final water cutoff date. Research has previously shown that irrigation practices do affect the relative maturity of the crop and can directly influence yields obtained in a single harvesting operation.
frequent irrigation, the usual man- agement practice in the production of hand-picked tomatoes, is not necessarily best suited for the new varieties developed for one-time mechanical harvesting. In addition to the need for determinate maturity, dry fields allow much more efficient operation of mechanical harvesting equipment. These studies were conducted to determine how dry the soil can become before affecting yield, maturity, and soluble solids content of the new varieties-and whether a plant or soil moisture index can be developed as a guide to irrigation of the growing crop, as well as the final water cutoff date. Research has previously shown that irrigation practices do affect the relative maturity of the crop and can directly influence yields obtained in a single harvesting operation.
Systemic Insecticides Play Major Role in Research for: Integrated Pest Control in Cotton
by H. T. Reynolds, R. L. Metcalf, T. R. Fukuto
| Full text HTML  | PDF  
literally hundreds of chemicals have been evaluated for possible use as systemic insecticides in an extension research program aimed at integrated pest control for cotton. This research-sponsored and financed largely by the Cotton Producer's Institute-promises to reduce insect-caused crop losses and extra production costs for cotton estimated at nearly $300 million annually in the United States.
literally hundreds of chemicals have been evaluated for possible use as systemic insecticides in an extension research program aimed at integrated pest control for cotton. This research-sponsored and financed largely by the Cotton Producer's Institute-promises to reduce insect-caused crop losses and extra production costs for cotton estimated at nearly $300 million annually in the United States.
Overhead Irrigation Encourages Wet-Weather Plant Diseases
by W. C. Snyder, R. G. Grogan, R. Bardin, M. N. Schroth
| Full text HTML  | PDF  
This report confirms previous research showing that such wet-warm-weather diseases as halo blight, anthracnose, black rot, downy mildew, leaf spot, early blight, bacterial spot, and other similar diseases, will disappear from warm-season, sprinkler-irrigated crops in California's coastal and interior valleys when the water is applied by furrow irrigation.
Vertical Mulching for Improvement of Old Golf Greens: …A further evaluation
by T. G. Byrne, W. B. Davis, L. J. Booher, L. F. Werenfels
| Full text HTML  | PDF  
The practice of close-spaced vertical mulching does not appear to be the complete solution to the problem of improving old golf greens. Better irrigation systems are also needed to take advantage of the new root environment provided by the improved soil mix in the vertical mulch holes. The interrelationship between vertical mulching and other cultural practices is also being studied.
Pasture and greenchop performance comparisons…: Piper Sudangrass and Sudan Hybrids Under Irrigation
by D. C. Sumner, V. L. Marble, E. J. Gregory
| Full text HTML  | PDF  
Many trials comparing the yielding ability of some of the sudan hybrids with Piper sudangrass have failed to show any significant differences in pasture production when based upon dry matter produced. Greenchop operators in California utilize these summer annuals in every stage of growth from near 20 inches in height to near maturity. The height at which these crops are harvested as greenchop depends upon how often the stand must be recut to keep material moving to the feeding operations. The data presented here suggests that if greenchop operators harvest their crop at about 5 to 6 ft or less in height, there is little or no advantage in using hybrids. If, however, green-chopping is confined to plant material, 7, 8, or 9 ft in height, there is a definite yield advantage from using the excellent sudan hybrids.
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California Agriculture, Vol. 19, No.5

Research on systemics for integrated pest control program in cotton involves workers in the field, greenhouse, laboratory, and office.
May 1965
Volume 19, Number 5

Research articles

Irrigation for Nursery Container Plants: Tensiometers, automatic timing for sprinkler control
by F. K. Aljibury, W. M. Tomlinson, C. E. Houston
| Full text HTML  | PDF  
Automatic sprinkler irrigation for nursery container plants—using tensiometers to determine water needs and an automatic clock system—can result in reduced labor and water costs, more efficient irrigation, and less worry for the operator. This report compares three methods of watering: manual irrigation with a drag hose, a manually operated sprinkler system, and the automatic system.
Irrigation for nursery container plants…: Plastic Tube Irrigators with Electric Control
by N. W. Stice, L. J. Booher
| Full text HTML  | PDF  
Large container-grown plants can be irrigated and fertilized by using nine 1/8-inch-diameter plastic tubes radiating from a central riser. Each master unit of the system is operated by a clock-controlled 3-inch valve and is capable of irrigating 720 containers simultaneously in five minutes. Four of the units now operating at a Sacramento nursery, where this study was conducted, can irrigate 2,880 containers in 20 minutes.
Frequent Irrigation Detrimental For Mechanically–Harvested: Tomatoes
by J. C. Lingle, R. M. Hagan, W. J. Flocker, P. E. Martin
| Full text HTML  | PDF  
frequent irrigation, the usual man- agement practice in the production of hand-picked tomatoes, is not necessarily best suited for the new varieties developed for one-time mechanical harvesting. In addition to the need for determinate maturity, dry fields allow much more efficient operation of mechanical harvesting equipment. These studies were conducted to determine how dry the soil can become before affecting yield, maturity, and soluble solids content of the new varieties-and whether a plant or soil moisture index can be developed as a guide to irrigation of the growing crop, as well as the final water cutoff date. Research has previously shown that irrigation practices do affect the relative maturity of the crop and can directly influence yields obtained in a single harvesting operation.
frequent irrigation, the usual man- agement practice in the production of hand-picked tomatoes, is not necessarily best suited for the new varieties developed for one-time mechanical harvesting. In addition to the need for determinate maturity, dry fields allow much more efficient operation of mechanical harvesting equipment. These studies were conducted to determine how dry the soil can become before affecting yield, maturity, and soluble solids content of the new varieties-and whether a plant or soil moisture index can be developed as a guide to irrigation of the growing crop, as well as the final water cutoff date. Research has previously shown that irrigation practices do affect the relative maturity of the crop and can directly influence yields obtained in a single harvesting operation.
Systemic Insecticides Play Major Role in Research for: Integrated Pest Control in Cotton
by H. T. Reynolds, R. L. Metcalf, T. R. Fukuto
| Full text HTML  | PDF  
literally hundreds of chemicals have been evaluated for possible use as systemic insecticides in an extension research program aimed at integrated pest control for cotton. This research-sponsored and financed largely by the Cotton Producer's Institute-promises to reduce insect-caused crop losses and extra production costs for cotton estimated at nearly $300 million annually in the United States.
literally hundreds of chemicals have been evaluated for possible use as systemic insecticides in an extension research program aimed at integrated pest control for cotton. This research-sponsored and financed largely by the Cotton Producer's Institute-promises to reduce insect-caused crop losses and extra production costs for cotton estimated at nearly $300 million annually in the United States.
Overhead Irrigation Encourages Wet-Weather Plant Diseases
by W. C. Snyder, R. G. Grogan, R. Bardin, M. N. Schroth
| Full text HTML  | PDF  
This report confirms previous research showing that such wet-warm-weather diseases as halo blight, anthracnose, black rot, downy mildew, leaf spot, early blight, bacterial spot, and other similar diseases, will disappear from warm-season, sprinkler-irrigated crops in California's coastal and interior valleys when the water is applied by furrow irrigation.
Vertical Mulching for Improvement of Old Golf Greens: …A further evaluation
by T. G. Byrne, W. B. Davis, L. J. Booher, L. F. Werenfels
| Full text HTML  | PDF  
The practice of close-spaced vertical mulching does not appear to be the complete solution to the problem of improving old golf greens. Better irrigation systems are also needed to take advantage of the new root environment provided by the improved soil mix in the vertical mulch holes. The interrelationship between vertical mulching and other cultural practices is also being studied.
Pasture and greenchop performance comparisons…: Piper Sudangrass and Sudan Hybrids Under Irrigation
by D. C. Sumner, V. L. Marble, E. J. Gregory
| Full text HTML  | PDF  
Many trials comparing the yielding ability of some of the sudan hybrids with Piper sudangrass have failed to show any significant differences in pasture production when based upon dry matter produced. Greenchop operators in California utilize these summer annuals in every stage of growth from near 20 inches in height to near maturity. The height at which these crops are harvested as greenchop depends upon how often the stand must be recut to keep material moving to the feeding operations. The data presented here suggests that if greenchop operators harvest their crop at about 5 to 6 ft or less in height, there is little or no advantage in using hybrids. If, however, green-chopping is confined to plant material, 7, 8, or 9 ft in height, there is a definite yield advantage from using the excellent sudan hybrids.

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