scholarly journals Is the Partial Root Drying Irrigation Method Suitable for Sandy Soils? Field Experiment and Modelling Using the Saltmed Model

2018 ◽  
Vol 67 (4) ◽  
pp. 477-490 ◽  
Author(s):  
R.E. Abdelraouf ◽  
R. Ragab
Keyword(s):  
Field Experiment ◽  
Sandy Soils ◽  
Irrigation Method ◽  
Partial Root Drying ◽  
Partial Root Drying Irrigation

Effects of NPK Fertilizers on young Coconut (Cocos nucifera) on a Sandy Soil in Sri Lanka

1980 ◽  
Vol 16 (1) ◽  
pp. 41-48 ◽  
Author(s):  
P. Loganathan ◽  
T. S. Balakrishnamurti
Keyword(s):  
Field Experiment ◽  
Sandy Soil ◽  
Vegetative Growth ◽  
Growth Parameters ◽  
Cocos Nucifera ◽  
Sandy Soils ◽  
Soil N ◽  
Leaf Production ◽  
Npk Fertilizers ◽  
Low Solubility

SUMMARYIn a 4 × 4 × 4 NPK field experiment with coconut on a sandy soil, N increased girth, height and leaf production during the pre-bearing period, but phosphorus (up to 6½ years) and K (up to 3½ years) had no effect on any vegetative growth parameters. The rates of fertilizers for optimum copra and nut yield (13 to 16 years) were 0.35, 0.73 and 0.64 kg N, PO and KO/palm/ year respectively. The high P requirement was due to the low solubility of the saphos phosphate in these sandy soils. A positive N × P interaction was also observed.

Drip as Alternative Irrigation Method for Potato in Florida Sandy Soils

2014 ◽  
Vol 91 (5) ◽  
pp. 504-516 ◽  
Author(s):  
J. Reyes-Cabrera ◽  
L. Zotarelli ◽  
D. L. Rowland ◽  
M. D. Dukes ◽  
S. A. Sargent
Keyword(s):  
Sandy Soils ◽  
Irrigation Method ◽  
Alternative Irrigation

PERSISTENCE OF BORAX IN SANDY SOILS

1958 ◽  
Vol 38 (2) ◽  
pp. 77-84 ◽  
Author(s):  
G. J. Ouellette
Keyword(s):  
Field Experiment ◽  
Soil Profile ◽  
Sandy Loam ◽  
Sandy Soils ◽  
Water Soluble ◽  
Soluble Form ◽  
Optimum Rate ◽  
Alfalfa Hay

A field experiment was conducted on St. Pacôme sandy loam to study the movement and accumulation of applied boron within the soil profile, and consequently determine the optimum rate and frequency of borax application to the sandy soils of Eastern Quebec for the production of alfalfa hay and seed. From 65 to 75 per cent of the borax applied, depending upon the rate used, had moved below the 36-inch depth 30 months after application. The remaining portion was found, mostly in water-soluble form, below the 16-inch depth in the case of plots which had received borax at the 10- and 15-lb. rates, and in the entire profile, but with greater concentration in lower depths, in the case of plots which had received 25 and 40 lb. per acre. Very little fixation of the boron applied occurred between the surface and the 36-inch depth. The biennial application of 15 to 20 lb. of borax for alfalfa hay and 25 to 30 lb. for seed appeared satisfactory on that soil.

Use of ammonia-releasing compounds for control of the root-knot nematode Meloidogyne javanica

Nematology ◽  
2002 ◽  
Vol 4 (1) ◽  
pp. 65-71 ◽  
Author(s):  
Yuji Oka ◽  
Shimon Pivonia
Keyword(s):  
Field Experiment ◽  
Field Experiments ◽  
Sandy Soils ◽  
Meloidogyne Javanica ◽  
Infested Soil ◽  
Root Knot Nematode ◽  
Tomato Plants ◽  
Tomato Yield ◽  
Plastic Bags ◽  
Ammonium Compounds

AbstractThe nematicidal activities of ammonia-releasing and ammonium compounds were tested against the root-knot nematode Meloidogyne javanica in pot, microplot and field experiments. Among ten compounds tested, NH4OH, (NH4)2HPO4 and NH4HCO3 showed greatest nematicidal activity at concentrations of 300 mg N/kg of NH4 or NH2 in pots. NH4OH was found to be the most nematicidal of these compounds. Enclosure of pots containing NH4OH-treated soils in plastic bags reduced the concentration of NH4OH needed to kill the nematodes from 200 mg N/kg in open pots to only 75 mg N/kg. In a microplot experiment, treatment of nematode-infested soil with NH4OH at 70 mg N/kg reduced the root-galling index to 0. In one field experiment, the nematicidal efficacy of NH4OH on tomato plants at doses of 1000 and 2000 kg N/ha was equivalent to those of Telopic C35® or metham sodium in combination with cadusafos. In another field experiment, NH4OH at 500 and 1000 kg N/ha increased tomato yield and at 1000 kg N/ha reduced the galling index, compared with untreated controls. The results suggest that NH4OH may serve as a nematicide in alkaline sandy soils.

scholarly journals Splash drift on light sandy soils: a field experiment

Agronomie ◽  
2000 ◽  
Vol 20 (3) ◽  
pp. 271-282 ◽  
Author(s):  
Dirk Goossens ◽  
Jean Poesen ◽  
Jens Gross ◽  
Wim Spaan
Keyword(s):  
Field Experiment ◽  
Sandy Soils

scholarly journals Partial root drying irrigation technique: Practical application of drought stress signaling mechanism in plants

2009 ◽  
Vol 61 (2) ◽  
pp. 285-288 ◽  
Author(s):  
Sladjana Savic ◽  
Radmila Stikic ◽  
Zorica Jovanovic ◽  
Ljiljana Prokic ◽  
Milena Paukovic
Keyword(s):  
Root Zone ◽  
Water Status ◽  
Practical Application ◽  
Signaling Mechanism ◽  
Tomato Yield ◽  
Novel Approach ◽  
Use Efficiency ◽  
Tomato Growth ◽  
Partial Root Drying ◽  
Partial Root Drying Irrigation

Partial root-zone drying (PRD) technique, a novel approach to watering crops, was developed on the basis of knowledge of root-to-shoot signaling in drying soil. The aim of the present paper was to investigate the effects of the PRD treatment on tomato growth and the water regime. The obtained PRD results showed significant reduction in shoot but not fruit growth in the absence of any changes in shoot water status, indicating the involvement of chemical root-to-shoot signals. Higher water use efficiency (WUE) results mean that the PRD technique can be used to reduce irrigation water without significant reduction of tomato yield.

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