scholarly journals The Effect of Height of Head on Young Apple Tree Growth and Yield

1928 ◽  
Author(s):  
H. L. Crane
Keyword(s):  
Tree Growth ◽  
Apple Tree ◽  
Growth And Yield ◽  
Young Apple

Orchard soil management trials. 2. Effect of herbicides and nitrogen on growth and yield of young apple trees in permanent pasture

1971 ◽  
Vol 11 (48) ◽  
pp. 105 ◽  
Author(s):  
P Baxter ◽  
BJ Newman
Keyword(s):  
Tree Growth ◽  
Fruit Set ◽  
Fruit Size ◽  
Soil Management ◽  
Growth And Yield ◽  
Apple Trees ◽  
Narrow Strip ◽  
Permanent Pasture ◽  
Orchard Soil ◽  
Young Apple

On two cultivars of young apple trees growing in a permanent pasture, a narrow strip was kept bare with herbicide sprays used either during spring and summer or during the entire year. This increased tree growth, fruit set, fruit yield, and fruit size. Using more nitrogen fertilizer did not compensate for the grass competition and did not increase growth or yield as much as did the herbicide sprays. Most of the applied nitrogen could be accounted for in the increased growth of grass. The herbicide simazine increased tree growth more than other herbicides.

scholarly journals FERTIGATION EFFECTS ON APPLE TREE GROWTH, CROPPING, AND DRY WEIGHT PARTITIONING

HortScience ◽  
1992 ◽  
Vol 27 (6) ◽  
pp. 620b-620 ◽  
Author(s):  
T. L. Robinson ◽  
W. C Stiles ◽  
A. N. Lakso
Keyword(s):  
Tree Growth ◽  
Apple Tree ◽  
Dry Weight ◽  
Field Studies ◽  
Growth And Yield ◽  
First Year ◽  
Trickle Irrigation ◽  
Cumulative Yield ◽  
Root Shoot Ratio ◽  
Total Tree

In two field studies with `Redchief Delicious'/MM.106, 'Empire'/M.9/MM.106 and 'Mutsu'/M.9/MM. 106 trees on fertile silt loam soils, trickle irrigation increased vegetative growth during the first three years and resulted in a 16%-20% increase in cumulative yield over the first five years. When fertilizer was injected into the irrigation water weekly from mid-April until the end of June, tree growth was further increased and cumulative yield was improved an additional 11%-15% for a total of 27%-35% greater yield than the non-irrigated trees. In these studies, ground fertilization did not improve growth or yield unless trickle irrigation was also applied. However, ground fertilization was not as effective as fertigation. Irrigation and fertigation increased the dry weight of roots by 23% and that of shoots by 36% in the first year resulting in a 10% reduction in the root/shoot ratio. Total tree dry weight was increased by 30% if trees were planted early (April 14) but only 14% if trees were planted late (June 10). Early planting resulted in 17% greater cumulative yield than trees planted late. Initial tree caliper also had a significant effect on early growth and yield with large caliper trees yielding 12% more than the small caliper trees. The interaction of planting date, tree caliper and fertigation resulted in a 50%-70% increase in yield during the first five years.

Young apple tree responses to crop load

2018 ◽  
pp. 221-228
Author(s):  
D. Stefanelli ◽  
T. Plozza ◽  
H. Flachowsky ◽  
J.N. Wünsche
Keyword(s):  
Apple Tree ◽  
Crop Load ◽  
Young Apple

Frequency of Herbicide Applications to Coffee Groves

1969 ◽  
Vol 64 (3) ◽  
pp. 249-258
Author(s):  
Elvin G. Boneta García
Keyword(s):  
Weed Control ◽  
Tree Growth ◽  
Tree Mortality ◽  
Growth And Yield ◽  
Coffee Production ◽  
Coffee Yield ◽  
Agricultural Experiment

Dowpon, Roundup, Gramoxone and mixtures of Karmex with Dowpon or Gramoxone applied with different frequency were evaluated for weed control in young sun-grown coffee trees at Adjuntas Agricultural Experiment Substation, located at lat. 18° N. and long. 66°48' W., and at an elevation of 588 m. Gramoxone (0.95 L/ha) applied at one- or two-month intervals provided excellent weed control. Dowpon at 5.65 and 11.30 kg/ha was equally effective on grasses but ineffective on broadleaves. Roundup (1.90 L/ha) provided good weed control without producing detrimental effects on tree growth and yield. The addition of Karmex to the Gramoxone or Dowpon solution to increase effectiveness in control is questionable. Tree mortality was higher and coffee yield lower when Karmex was added to the solution than when either Gramoxone or Dowpon was used alone. When Dowpon was applied at a rate of 11.30 kg/ha, coffee production was significantly higher than production of the remaining treatments, except for that of the application of 5.65 kg/ha of Dowpon at 12-week interval. The production of the latter plots was significantly higher than that of plots in which Karmex (2.26 kg/ha) was added to the Dowpon (5.65 kg/ha) or the Gramoxone solution (0.95 L/ha) and applied each at 12-week intervals. Coffee yield when the weeds were controlled by Roundup (1.90 L/ha) or Gramoxone (0.95 L/ha) was significantly higher than that when Karmex (2.26 kg/ha) was added to the Gramoxone solution and applied every 12 weeks.

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