scholarly journals Effect of Hurricanes on Commercial Tomato Crop Production in Southern Florida

2013 ◽  
Vol 23 (4) ◽  
pp. 498-504
Author(s):  
Monica Ozores-Hampton ◽  
K.E. Cushman ◽  
F. Roka ◽  
R.D. French-Monar
Keyword(s):  
Crop Production ◽  
Soil Surface ◽  
Dry Weight ◽  
Plant Size ◽  
Potential Yield ◽  
Tomato Crop ◽  
Size Category ◽  
Hurricane Wilma ◽  
Tomato Seedlings ◽  
Severity Of Injury

Several experiments were conducted in commercial tomato (Solanum lycopersicum) plantings during the 2004–05 and 2005–06 seasons in Immokalee, FL, to understand types of plant damage and potential yield reductions caused by hurricanes. Expt. 1 involved ‘Florida 91’ tomato seedlings damaged during 2004 by hurricane Frances, 15 days after transplanting (DAT). Individual plants were rated and categorized as best, good, or fair, 34 DAT according to plant size and vigor/severity of injury. Ten plants from each category were removed with roots intact, and dry weights were recorded. During 2005, 23 DAT or 8 days after hurricane Wilma, Expt. 2 was conducted to compare rescued and replanted ‘Soraya’ tomato seedlings. Rescued seedlings were left in place after the hurricane and others were removed and replaced with new transplants of the same variety. Expt. 3 (‘Florida 47’) and 4 (‘BHN 586’) involved the contrast of two yield seasons without a hurricane (2004–05) and with hurricane Wilma (2005–06) to estimate the effect of the hurricane damage on tomato 65 and 45 DAT. Fruit was counted, graded by size, and weighed for each experiment from 10 plants/plot. Injury caused by hurricane winds was most evident in Expt. 1 mostly in stem damage below the soil surface showed callous tissue at the site of injury due to plants being whipped around in the planting hole. Plants rated “best” showed greater plant and root dry weight, stem diameter below the injury point, and higher yield of extra large and total marketable fruit at first harvest than plants rated good or fair. Total marketable yields from rescued plants in Expt. 2 were double than that from replanted plants, and fruit matured 20 days earlier for rescued plants indicating that plants injured by Wilma recovered quickly. Hurricane-damaged crops during 2005–06 in Expts. 3 and 4 yielded 60% lower than that of undamaged crops during 2004–05. In the extra large size category, the yields were reduced between 34% and 12% from the previous season. However, hurricane-damaged loss of yield in the extra large category was offset by increased yield in the medium category. It appears that hurricane-damaged plants, when young, were capable of full recovery and normal yields, whereas hurricane-damaged plants, when older at the time injury occurred, were not able to fully recover and eventually produced only half the normal yield.

scholarly journals Morfofisiologi Ratun Padi Sistem Tanam Benih Langsung di Lahan Pasang Surut

2017 ◽  
Vol 44 (3) ◽  
pp. 228 ◽  
Author(s):  
Evriani Mareza ◽  
Zainal Ridho Djafar ◽  
Rujito Agus Suwignyo ◽  
Dan Andi Wijaya
Keyword(s):  
Leaf Area ◽  
Crop Production ◽  
Block Design ◽  
Soil Surface ◽  
Dry Weight ◽  
Direct Seeding ◽  
Randomized Block Design ◽  
Tidal Swamp ◽  
Number Of Leaves ◽  
Cutting Height

<p>ABSTRACT<br /><br />The morphophysiology of ratoon is different from the main plant of rice and was influenced by location and cultivation.This research was intended to evaluate morphophysiology characters of rice ratoon planted by direct seeding system in tidal swamp at various stubble cutting height. The experiment was conducted in November 2013-April 2014 at tidal swamp overflow type B in Telang Sari Village, District of Tanjung Lago, Banyuasin, South Sumatra Province. The experiment used randomized block design with 5 replications. Treatment was stubble cutting height 10, 20, 30, 40 and 50 cm above the soil surface. Rice was planted at 4 m x 5 m plot, the distance between plot 1 m. Data were analyzed by test of variance and 5% HSD test. Morphophysiological characters of rice ratoon were influenced by stubble cutting height. Cutting height of 20-40 cm above soil surface increased the ratoon number of tillers per hill, leaf area per hill, dry weight per hill, percentage of empty grains per panicle, grain weight per hill and percentage ratoon/main crop production per hill. The higher stubble cutting, the lower the number of leaves per tiller, leaf area per tiller, carbohydrate content, and number of grains per panicle of ratoon, however it accelerated age of flowering and harvesting. <br /><br />Keywords: direct seeding system, ratoon system, rice growth and production, stubble cutting height<br /><br /></p>

scholarly journals Substrate incubation time after fungi inoculation in the control tomato seedling damping-off

2021 ◽  
pp. 411-415
Author(s):  
Gabriel Danilo Shimizu ◽  
Rafael de Freitas Orozimbo da Silva ◽  
Luana Tainá Machado Ribeiro ◽  
Maíra Tiaki Higuchi ◽  
Jean Carlo Baudraz de Paula ◽  
...  
Keyword(s):  
Incubation Time ◽  
Trichoderma Harzianum ◽  
Crop Production ◽  
Plant Diseases ◽  
Damping Off ◽  
Trichoderma Spp ◽  
Tomato Crop ◽  
Tomato Seedling ◽  
Tomato Seedlings ◽  
Progress Curve

The use of fungi of the genus Trichoderma spp. for the control of plant diseases it has proved to be an important and promising tool, mainly for the tomato crop production system, however, there are difficulties in establishing the bioagent. This work aimed to evaluate the effect of substrate incubation time after inoculation with Trichoderma harzianum to control the damping-off of tomato seedlings. The experimental design was completely randomized, consisting of six treatments and four replications. The treatments are two incubation times in two doses of T. harzianum (0 and 10 days of substrate incubation [DIST] after inoculation with T. harzianum in 1.0 or 5.0 g of T. harzianum) and two controls (control inoculated and not inoculated with Rhizoctonia solani). The variables analyzed were incidence of damping-off, area under the disease progress curve, percentage of emergence, emergency speed index, average emergency time, germination speed coefficient, total fresh mass, root length (cm) and height of the area part (cm). The treatments containing Trichoderma harzianum have proven to be promising for the control of R. solani and for the growth of tomato seedlings.

Effects of Direct Drilling on the Phosphorus Uptake and Fertilizer Requirements of Wheat

1987 ◽  
Vol 38 (4) ◽  
pp. 775 ◽  
Author(s):  
PS Cornish
Keyword(s):  
Field Experiments ◽  
Maximum Yield ◽  
Phosphorus Uptake ◽  
Soil Surface ◽  
Dry Weight ◽  
Available Phosphorus ◽  
Potential Yield ◽  
P Concentration ◽  
P Fertilizer ◽  
Direct Drilling

The effect of direct drilling on the phosphorus (P) relations of ~vheatw as examined in seven field experiments over three years. Compared with conventional cultivation of the soil, direct drilling concentrated available phosphorus nearer the soil surface and resulted in higher strength and lower root length in surface soil (0-10 cm). Tissue-P concentration and dry weight of young plants (< 10 weeks) were consistently lower after direct drilling. It appeared therefore that direct drilling limited the uptake of soil phosphorus. An unknown factor also reduced plant dry weight per unit of P taken up in some experiments, whilst high rates of P fertilizer generally failed to give equal P concentration or dry weight in early growth. It is suggested that the young plants were unable to exploit fully the banded fertilizer because of insufficient adaptation of roots to the concentrated source of P and that this effect is a greater disadvantage for a direct-drilled crop. Direct drilling gave lower grain yields in four experiments when no fertilizer was applied, but where rates of P fertilizer were high, the two tillage treatments produced equal'pields. In these four experiments direct-drilled crops needed more fertilizer to attain 90% of the maximum yield. Crops in cultivated soil had the higher dry weight at anthesis and therefore the higher potential yield at equal rates of P fertilizer (in two years), but they failed to realize their potential at high rates of fertilizer because their greater vegetative growth led to increased water stress after flowering.

scholarly journals Native bacteria isolated from roots and rhizosphere of Solanum lycopersicum L. increase tomato seedling growth under a reduced fertilization regime

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
María Micaela Pérez-Rodriguez ◽  
Patricia Piccoli ◽  
María Soledad Anzuay ◽  
Rita Baraldi ◽  
Luisa Neri ◽  
...  
Keyword(s):  
Integrated Management ◽  
Dry Weight ◽  
Leaf Nitrogen ◽  
Tomato Crop ◽  
Tomato Seedling ◽  
Tomato Seedlings ◽  
Solanum Lycopersicum L ◽  
Genes Encoding ◽  
Native Strains ◽  
Solubilizing Activity

Abstract In semiarid regions is important to use native strains best adapted to these environments to optimize plant-PGPR interaction. We aimed to isolate and characterize PGPR from roots and rhizosphere of a tomato crop, as well as studying the effect of its inoculation on tomato seedlings growth. We selected four strains considering their effectiveness of fixing nitrogen, solubilizing phosphate, producing siderophores and indole acetic acid. They belong to the genera Enterobacter, Pseudomonas, Cellulosimicrobium, and Ochrobactrum. In addition, we also analyzed the ability to solubilize Ca3(PO4)2, FePO4 and AlPO4 and the presence of one of the genes encoding the cofactor PQQ in their genome. Enterobacter 64S1 and Pseudomonas 42P4 showed the highest phosphorus solubilizing activity and presence of pqqE gene. Furthermore, in a tomato-based bioassay in speed-bed demonstrated that a sole inoculation at seedling stage with the strains increased dry weight of roots (49–88%) and shoots (39–55%), stem height (8–13%) and diameter (5–8%) and leaf area (22–31%) and were equal or even higher than fertilization treatment. Leaf nitrogen and chlorophyll levels were also increased (50–80% and 26–33%) compared to control. These results suggest that Enterobacter 64S1 and Pseudomonas 42P4 can be used as bio-inoculant in order to realize a nutrient integrated management.

scholarly journals Semi-Transparent Organic Photovoltaics Applied as Greenhouse Shade for Spring and Summer Tomato Production in Arid Climate

Agronomy ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1152
Author(s):  
Rebekah Waller ◽  
Murat Kacira ◽  
Esther Magadley ◽  
Meir Teitel ◽  
Ibrahim Yehia
Keyword(s):  
Solar Radiation ◽  
Organic Photovoltaics ◽  
Crop Production ◽  
Production Systems ◽  
High Light ◽  
Growth And Yield ◽  
Control Group ◽  
Tomato Crop ◽  
Tomato Production ◽  
Control Section

Recognizing the growing interest in the application of organic photovoltaics (OPVs) with greenhouse crop production systems, in this study we used flexible, roll-to-roll printed, semi-transparent OPV arrays as a roof shade for a greenhouse hydroponic tomato production system during a spring and summer production season in the arid southwestern U.S. The wavelength-selective OPV arrays were installed in a contiguous area on a section of the greenhouse roof, decreasing the transmittance of all solar radiation wavelengths and photosynthetically active radiation (PAR) wavelengths (400–700 nm) to the OPV-shaded area by approximately 40% and 37%, respectively. Microclimate conditions and tomato crop growth and yield parameters were measured in both the OPV-shaded (‘OPV’) and non-OPV-shaded (‘Control’) sections of the greenhouse. The OPV shade stabilized the canopy temperature during midday periods with the highest solar radiation intensities, performing the function of a conventional shading method. Although delayed fruit development and ripening in the OPV section resulted in lower total yields compared to the Control section (24.6 kg m−2 and 27.7 kg m−2, respectively), after the fourth (of 10 total) harvests, the average weekly yield, fruit number, and fruit mass were not significantly different between the treatment (OPV-shaded) and control group. Light use efficiency (LUE), defined as the ratio of total fruit yield to accumulated PAR received by the plant canopy, was nearly twice as high as the Control section, with 21.4 g of fruit per mole of PAR for plants in the OPV-covered section compared to 10.1 g in the Control section. Overall, this study demonstrated that the use of semi-transparent OPVs as a seasonal shade element for greenhouse production in a high-light region is feasible. However, a higher transmission of PAR and greater OPV device efficiency and durability could make OPV shades more economically viable, providing a desirable solution for co-located greenhouse crop production and renewable energy generation in hot and high-light intensity regions.

scholarly journals Synergy between a shallow root system with a DRO1 homologue and localized P application improves P uptake of lowland rice

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Aung Zaw Oo ◽  
Yasuhiro Tsujimoto ◽  
Mana Mukai ◽  
Tomohiro Nishigaki ◽  
Toshiyuki Takai ◽  
...  
Keyword(s):  
Root System ◽  
Crop Production ◽  
Soil Surface ◽  
P Uptake ◽  
Ore Deposits ◽  
Root Surface Area ◽  
Genetic Traits ◽  
P Use Efficiency ◽  
Use Efficiency ◽  
P Application

AbstractImproved phosphorus (P) use efficiency for crop production is needed, given the depletion of phosphorus ore deposits, and increasing ecological concerns about its excessive use. Root system architecture (RSA) is important in efficiently capturing immobile P in soils, while agronomically, localized P application near the roots is a potential approach to address this issue. However, the interaction between genetic traits of RSA and localized P application has been little understood. Near-isogenic lines (NILs) and their parent of rice (qsor1-NIL, Dro1-NIL, and IR64, with shallow, deep, and intermediate root growth angles (RGA), respectively) were grown in flooded pots after placing P near the roots at transplanting (P-dipping). The experiment identified that the P-dipping created an available P hotspot at the plant base of the soil surface layer where the qsor1-NIL had the greatest root biomass and root surface area despite no genotyipic differences in total values, whereby the qsor1-NIL had significantly greater biomass and P uptake than the other genotypes in the P-dipping. The superior surface root development of qsor1-NIL could have facilitated P uptakes from the P hotspot, implying that P-use efficiency in crop production can be further increased by combining genetic traits of RSA and localized P application.

Effect of Particle Size and Reused Organic Substrates on Tomato Crop Production

2015 ◽  
Vol 38 (12) ◽  
pp. 1877-1884
Author(s):  
Alberto Gabino Martínez-Gutiérrez ◽  
Angélica Bautista Cruz ◽  
Cirenio Escamirosa Tinoco ◽  
Juana Yolanda López Cruz ◽  
Miguel Urrestarazu
Keyword(s):  
Particle Size ◽  
Crop Production ◽  
Organic Substrates ◽  
Tomato Crop ◽  
Effect Of Particle Size

scholarly journals Plant uptake of nitrogen adsorbed to biochars made from dairy manure

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Leilah Krounbi ◽  
Akio Enders ◽  
John Gaunt ◽  
Margaret Ball ◽  
Johannes Lehmann
Keyword(s):  
New York ◽  
Crop Production ◽  
Liquid Fraction ◽  
N Uptake ◽  
Dry Weight ◽  
Dairy Manure ◽  
Production Costs ◽  
Available N ◽  
Dairy Waste ◽  
Pre Treatment

AbstractThe conversion of dairy waste with high moisture contents to dry fertilizers may reduce environmental degradation while lowering crop production costs. We converted the solid portion of screw-pressed dairy manure into a sorbent for volatile ammonia (NH3) in the liquid fraction using pyrolysis and pre-treatment with carbon dioxide (CO2). The extractable N in manure biochar exposed to NH3 following CO2 pre-treatment reached 3.36 g N kg−1, 1260-fold greater extractable N than in untreated manure biochar. Ammonia exposure was 142-times more effective in increasing extractable N than immersing manure biochar in the liquid fraction containing dissolved ammonium. Radish and tomato grown in horticultural media with manure biochar treated with CO2 + NH3 promoted up to 35% greater plant growth (dry weight) and 36–83% greater N uptake compared to manure biochar alone. Uptake of N was similar between plants grown with wood biochar exposed to CO2 + NH3, compared to N-equivalent treatments. The available N in dairy waste in New York (NY) state, if pyrolyzed and treated with NH3 + CO2, is equivalent to 11,732–42,232 Mg N year−1, valued at 6–21.5 million USD year−1. Separated dairy manure treated with CO2 + NH3 can offset 23–82% of N fertilizer needs of NY State, while stabilizing both the solid and liquid fraction of manure for reduced environmental pollution.

COMPARATIVE STUDY ON EVAPORATING DEMAND OF THE ATMOSPHERE USING ENERGY BALANCE METHODS

2021 ◽  
Vol 5 (2) ◽  
pp. 428-433
Author(s):  
John M. Peter ◽  
M. U. Hamisu
Keyword(s):  
Crop Production ◽  
Root Zone ◽  
Reference Evapotranspiration ◽  
Soil Surface ◽  
Antagonistic Effect ◽  
Climatic Parameter ◽  
Qualitative Understanding ◽  
Simple Term ◽  
Healthy Growth ◽  
Crops Yield

In this study, two models are computed which are modified penman's monteith and Hargreaves – Samani model. The essence is to provide qualitative information related to the antagonistic effect of climate change on sustainable crop production through qualitative understanding of evaporation and transpiration processes in simple term evapotranspiration (ETo). This is computed using climatic parameters obtained from Abubakar Tafawa Balewa University; Agro weather station, Bauchi for the period of three years. This describes the two processes of water loss on plants, at first, through transpiration and on another note, on the soil surface by evaporation. The study deduced a comparative analysis on aforementioned Methods to determine the evaporating power of the atmosphere in improving crops yield and production through estimating the amount of water needed at the root zone of the plant and also, the seasonal variation during the study. The result of this study shows a little deviation in the two models. The model based on Modified Penman's Monteith displays optimal evapotranspiration. This makes the model satisfy its creation for estimation of reference evapotranspiration. In May, June, September, and October for 2013-2015, high trends are recorded. While In July and August low trend was recorded between climatic parameter and the estimated evapotranspiration. The statistical analyses also show that there is a linear relationship between the two estimated models. In the above months, it shows that application of water is needed for the healthy growth of crops and improved crops yield

scholarly journals Effect of arsenic on Amaranthus gangeticus

2018 ◽  
Vol 53 (4) ◽  
pp. 259-264
Author(s):  
MZ Hossain ◽  
Sushmita Dey ◽  
MS Islam
Keyword(s):  
Irrigation Water ◽  
Crop Production ◽  
Growth Yield ◽  
Dry Weight ◽  
Arsenic Contamination ◽  
Pot Experiment ◽  
Production Potential ◽  
Groundwater Arsenic ◽  
Major Nutrients

Groundwater arsenic contamination has become a threat to the crop production potential in the soils of vast areas of Bangladesh. Situation is grave in some districts of the country, particularly the southern part. A pot experiment was conducted to investigate the effects of arsenic treated irrigation water (0, 1, 2, 5 and 10 mgL-1), where a total of ten (10) irrigations were provided thus the treatments received 0, 10, 20, 50, and 100 mg arsenic (As) pot-1. Effects of applied levels of arsenic on Amaranthus gangeticus (Lal shak) were evaluated in terms of the growth, yield, major nutrients’ content, and their translocation in the plant. As treatments significantly reduced (p≤0.05) the dry weight of shoot and root by 19.31% and 44.03% respectively. Both total and available concentrations of nitrogen (N), potassium (K) and sulfur (S) were significantly (p≤ 0.05) suppressed by the As treatments, while only higher three doses significantly (p≤ 0.05) affected both levels of concentrations of phosphorus (P), calcium (Ca) and magnesium (Mg). Translocation coefficients for soil to root for P, K, S, and Mg were significantly reduced (p≤ 0.05), while translocation coefficients for root to shoot were significantly increased (p≤ 0.05) for K and S by 5 and 10 mgL-1 of arsenic treatments.Bangladesh J. Sci. Ind. Res.53(4), 259-264, 2018

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