scholarly journals Fertilization Rate and Placement Effects on Areca Palms Transplanted from Containers or a Field Nursery

2012 ◽  
Vol 38 (4) ◽  
pp. 146-150
Author(s):  
Timothy Broschat ◽  
Kimberly Moore
Keyword(s):  
Fertilization Rate ◽  
Potassium Deficiency ◽  
Fertilizer Placement ◽  
Placement Method ◽  
Deficiency Symptoms ◽  
Rate Effects ◽  
Field Nursery ◽  
Better Than

Areca palms (Dypsis lutescens [(H. Wendl.) Beentje and J. Dransf.]) were transplanted from containers or a field nursery and were treated with fertilizer placed at the bottom of the planting hole, incorporated into the backfill, or on the surface of the root ball to determine the effects of fertilizer placement at planting on palm growth and quality. Fertilizer was applied at 0, 250 g (20 g N), or 500 g (40 g N) per tree for each placement method to determine fertilization rate effects. Areca palms transplanted from containers grew best when fertilizer was incorporated into the backfill, but any fertilizer placement or rate was better than no fertilizer. When areca palms were transplanted from a field nursery, there was no consistently best fertilizer placement method. However, fertilized plants grew better and had less severe nitrogen and potassium deficiency symptoms than unfertilized palms. There was no benefit to higher fertilization rate for either container- or field-grown areca palms.

scholarly journals Evaluation of glassy frits as micronutrient fertilizers. II. Manganese frits.

1967 ◽  
Vol 15 (1) ◽  
pp. 21-30
Author(s):  
C.H. Henkens ◽  
K.W. Smilde
Keyword(s):  
Sugar Beet ◽  
Field Tests ◽  
Sugar Production ◽  
Mn Deficiency ◽  
Deficiency Symptoms ◽  
Foliar Treatment ◽  
Marsh Spot ◽  
Mn Content ◽  
Second Year ◽  
Better Than

In pot and field tests MnSO4 and the frits FTE Z 4 (13 % Mn), HZ 1 (15.9 % Mn) and HZ 17 (21 % Mn) increased reducible soil Mn for at least 1 1/2-2 years. Mn content of pasture increased four-fold in the first cut after application of 400 kg/ha MnSO4 but sharply decreased in later cuts and became negligible by the second year. 400 kg/ha HZ 17 did not affect pasture Mn. In peas 400 kg of soil- or foliar applied MnSO4 controlled marsh spot better than 800 kg HZ 1; spraying at the middle and again at the end of the blooming stage gave the best control. With sugar beet, soil dressings of MnSO4, HZ 1 and HZ 17 equally increased yield, sugar production and leaf Mn, and decreased incidence of Mn deficiency. When the rates of these fertilizers were increased from 100, 179 and 86 kg respectively to 400, 714 and 343 kg, sugar production was not significantly improved; leaf Mn and incidence of deficiency symptoms responded to the higher Mn rates. Soil application was rather better than foliar treatment. No treatment controlled Mn deficiency throughout the entire season. The % of Mn-deficient plants was related, negatively, to leaf and reducible soil Mn, but not to yield. Soil-applied Mn did not control gray spot in oats or increase yields but sprayed Mn did. (Abstract retrieved from CAB Abstracts by CABI’s permission)

Fertilizer Placement Affects Jointed Goatgrass (Aegilops cylindrica) Competition In Winter Wheat (Triticum aestivum)

1999 ◽  
Vol 13 (2) ◽  
pp. 374-377 ◽  
Author(s):  
Abdel O. Mesbah ◽  
Stephen D. Miller
Keyword(s):  
Winter Wheat ◽  
Seed Weight ◽  
Wheat Yield ◽  
Soil Surface ◽  
Fertilizer Placement ◽  
Aegilops Cylindrica ◽  
Plant Seeds ◽  
Placement Method ◽  
Jointed Goatgrass ◽  
Injection Methods

A 3-yr study was conducted in eastern Wyoming from 1995 to 1997 to evaluate the effect of fertilizer placement on jointed goatgrass competitiveness with winter wheat. Fertilizer placement methods consisted of applying 45 kg/ha of nitrogen (50% as urea and 50% as ammonium nitrate) in a deep band 5 cm below and 2.5 cm to the side of the wheat row, broadcasting on the soil surface, or injecting fertilizer by spoke wheel 10 cm deep and 5 cm to the side of the wheat row. Neither fertilizer placement nor jointed goatgrass presence affected winter wheat stand. Wheat yield reductions from jointed goatgrass competition were 7 and 10% higher with the broadcast than deep-band or spoke-wheel injection methods, respectively. Wheat spikes/plant, seeds/spike, 200-seed weight, and plant height were not influenced by fertilizer placement; however, the presence of 35 jointed goatgrass plants/m2reduced spikes/plant 21%, seeds/spike 12%, and 200-seed weight 6%. Jointed goatgrass populations were not influenced by fertilizer placement method; however, the number of spikes/plant was reduced 8 and 10%, joints/spike 3%, and biomass 15 and 21% by deep band or spoke wheel fertilizer placement.

Nutrition of Grevillea robusta

1966 ◽  
Vol 14 (2) ◽  
pp. 151 ◽  
Author(s):  
cWE Moore ◽  
K Keraitis
Keyword(s):  
Major Element ◽  
Potassium Deficiency ◽  
Stem Diameter ◽  
Root Weight ◽  
Nutrient Deficiencies ◽  
Grevillea Robusta ◽  
Night Temperature ◽  
Absolute Level ◽  
Minor Elements ◽  
Deficiency Symptoms

Seedlings of G. robusta were grown in perlite in a glasshouse in which the day/ night temperature regime was controlled at approximately 25/20°C. The effects of nutrient deficiencies and of potassium × nitrogen interactions were examined. Deficiency symptoms were observed when each major element, and the minor elements manganese and boron, were omitted from the nutrient solution, and in general omissions had significant effects on height, basal stem diameter, stem weight, leaf weight, root weight, and number and weight of branches. Omissions of zinc, copper, and molybdenum had no effect on these characteristics, and no deficiency symptoms were observed. Significant effects of increasing nitrogen and increasing potassium were obtained for all characters measured, and except for basal stem diameter there were significant potassium × nitrogen interactions. The development of deficiency symptoms for potassium and nitrogen is dependent not only on the absolute level of the particular nutrient but also on the balance of both nutrients. This was particularly evident in the case of potassium deficiency.

scholarly journals Node Placement for Long Bounded Belt Complete 2-Coverage in Wireless Sensor Networks

2015 ◽  
Vol 2015 ◽  
pp. 1-13 ◽  
Author(s):  
Tingting Wang ◽  
Yanjing Sun ◽  
Zhao Xu ◽  
Wenyan Zhai ◽  
Ran Zhuo
Keyword(s):  
Isosceles Triangle ◽  
Wireless Sensor ◽  
Complete Coverage ◽  
Node Placement ◽  
Placement Method ◽  
Coverage Density ◽  
Strip Theory ◽  
Sensing Radius ◽  
Belt Width ◽  
Better Than

Based on Isosceles Triangle (Iso-Tri) placement and the extended Equalization Strip theory, we propose an Isosceles Trapezoid complete 2-coverage (Iso-TraC2) placement method for completely covering a long bounded belt area, which requires that any point within the belt is covered by at least two nodes. Coverage density and coverage efficiency are calculated to evaluate the degree of complete coverage, which can reflect the number of nodes needed and the degree of redundancy, respectively. The extreme ratio of sensing radius to belt width is deduced when the coverage density reaches the minimal value. Results demonstrate that when a belt with widthwis given, the node sensing radiusrhad better satisfiedw<r<2wto guarantee a higher coverage efficiency and lower coverage density for bounded belt compete coverage. Mathematical analysis shows that the proposed method performs better than the existing ones with smaller nodes number and less coverage redundancy.

scholarly journals Innovative Optimal Approach to Implement Fast Propagation Tissue Culture

2017 ◽  
Vol 14 (2) ◽  
pp. 615-620
Author(s):  
Hossein Nazarian ◽  
Amir Hossein Ghadimi
Keyword(s):  
Tissue Culture ◽  
Plant Growth ◽  
Growth Regulators ◽  
Optimal Placement ◽  
Regeneration Ability ◽  
Adaxial Side ◽  
Placement Method ◽  
Optimal Approach ◽  
Different Parts ◽  
Better Than

ABSTRACT: In this study bulbetets of royal lily have been used as explants. The innovative approach is based on optimal placement and adventitious sprout induction and the adventitious sprout proliferation in special conditions. Then effects of different parts of scales and placement method, types and concentrations of cytokinin, different parts of bulbetet scales and placement method on adventitious sprout induction have been discussed. At the end the effects of plant growth regulators on induction and multiplication of bulbetet scales of royal lily have been studied. The results represents that the regeneration ability of outer layer scales of royal lily is better than the middle ones, which was better than the inner ones. The adaxial side of royal lily bulbetets in contact with medium upward can produce more and stronger adventitious sprouts than the adaxial side downward.

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