scholarly journals Construction of Large Low Cost Filters for Plant Growth Studies

1960 ◽  
Vol 35 (5) ◽  
pp. 696-699 ◽  
Author(s):  
Saul Zalik ◽  
R. A. Miller
Keyword(s):  
Plant Growth ◽  
Low Cost ◽  
Growth Studies

Philosophical Aspects of Measurements, Equations and Inferences in Plant Growth Studies

1986 ◽  
Vol 58 (1) ◽  
pp. 73-80 ◽  
Author(s):  
J. WARREN WILSON ◽  
R. HUNT ◽  
D. W. HAND
Keyword(s):  
Plant Growth ◽  
Growth Studies

scholarly journals Development of low-cost formulations of plant growth-promoting bacteria to be used as inoculants in beneficial agricultural technologies

2019 ◽  
Vol 219 ◽  
pp. 12-25 ◽  
Author(s):  
Constanza Belén Lobo ◽  
María Silvina Juárez Tomás ◽  
Emilce Viruel ◽  
Marcela Alejandra Ferrero ◽  
María Ester Lucca
Keyword(s):  
Plant Growth ◽  
Low Cost ◽  
Plant Growth Promoting Bacteria ◽  
Agricultural Technologies ◽  
Plant Growth Promoting ◽  
Growth Promoting

scholarly journals Importance of Mineral Nutrition for Mitigating Aluminum Toxicity in Plants on Acidic Soils: Current Status and Opportunities

2018 ◽  
Vol 19 (10) ◽  
pp. 3073 ◽  
Author(s):  
Md. Rahman ◽  
Sang-Hoon Lee ◽  
Hee Ji ◽  
Ahmad Kabir ◽  
Chris Jones ◽  
...  
Keyword(s):  
Plant Growth ◽  
Mineral Nutrition ◽  
Aluminum Toxicity ◽  
Low Cost ◽  
Acid Soils ◽  
Cost Effective ◽  
Al Toxicity ◽  
Current Status ◽  
Root Tips ◽  
Acidic Soils

Aluminum (Al) toxicity is one of the major limitations that inhibit plant growth and development in acidic soils. In acidic soils (pH < 5.0), phototoxic-aluminum (Al3+) rapidly inhibits root growth, and subsequently affects water and nutrient uptake in plants. This review updates the existing knowledge concerning the role of mineral nutrition for alleviating Al toxicity in plants to acid soils. Here, we explored phosphorus (P) is more beneficial in plants under P-deficient, and Al toxic conditions. Exogenous P addition increased root respiration, plant growth, chlorophyll content, and dry matter yield. Calcium (Ca) amendment (liming) is effective for correcting soil acidity, and for alleviating Al toxicity. Magnesium (Mg) is able to prevent Al migration through the cytosolic plasma membrane in root tips. Sulfur (S) is recognized as a versatile element that alleviates several metals toxicity including Al. Moreover, silicon (Si), and other components such as industrial byproducts, hormones, organic acids, polyamines, biofertilizers, and biochars played promising roles for mitigating Al toxicity in plants. Furthermore, this review provides a comprehensive understanding of several new methods and low-cost effective strategies relevant to the exogenous application of mineral nutrition on Al toxicity mitigation. This information would be effective for further improvement of crop plants in acid soils.

A RADIANT ENERGY METER AND INTEGRATOR FOR PLANT GROWTH STUDIES

1967 ◽  
Vol 45 (11) ◽  
pp. 2081-2085 ◽  
Author(s):  
E. J. Brach ◽  
A. R. Mack
Keyword(s):  
Plant Growth ◽  
Operational Amplifier ◽  
Radiant Energy ◽  
Energy Meter ◽  
Growth Studies ◽  
Better Than

An instrument designed to indicate, record, and integrate radiant energy sensed by an Eppley thermopile is described. The output of the thermopile is amplified by a d-c. operational amplifier. The amplified output is connected to a meter or a recorder and totalized by an integrator. The output is calibrated in Ly min−1 and the sensitivity in the three recording modes is better than 0.02 Ly min−1.

scholarly journals Effects of topsoil treatments on afforestation in a dry Mediterranean climate (southern Spain)

Solid Earth ◽  
2016 ◽  
Vol 7 (5) ◽  
pp. 1479-1489 ◽  
Author(s):  
Paloma Hueso-González ◽  
Juan Francisco Martínez-Murillo ◽  
Jose Damian Ruiz-Sinoga
Keyword(s):  
Plant Growth ◽  
Pinus Halepensis ◽  
Low Cost ◽  
Treatment Plant ◽  
Organic Amendments ◽  
Climatic Conditions ◽  
Growth And Survival ◽  
Sheep Manure ◽  
High Level ◽  
Survival Of Seedlings

Abstract. Afforestation programs in semiarid areas are associated with a high level of sapling mortality. Therefore, the development of alternative low-cost and low-environmental-impact afforestation methods that ensure the survival of seedlings is crucial for improving the efficiency of Mediterranean forest management. This study assessed the effects of five types of soil amendments on the afforestation success (e.g., plant growth and survival) of a Mediterranean semiarid area. The amendments tested were (i) straw mulch; (ii) mulch containing chipped branches of Aleppo pine (Pinus halepensis L.); (iii) sheep manure compost; (iv) sewage sludge from a wastewater treatment plant; and (v) TerraCottem hydroabsorbent polymer. We hypothesized that in the context of dry Mediterranean climatic conditions, the use of organic amendments would enhance plant establishment and ensure successful afforestation. The results showed that afforestation success varied among the various soil amendment treatments in the experimental plots. The amendments had no effect on soil organic carbon, pH, or salinity, but the results indicated that the addition of mulch or hydroabsorbent polymer can reduce transplant stress by increasing the soil water available for plant growth throughout the hydrological year, and potentially improve the success of afforestation by reducing plant mortality.

scholarly journals Microbiological Properties of Beejamrit, an Ancient Indian Traditional Knowledge, Uncover a Dynamic Plant-Beneficial Microbial Network

2021 ◽  
Author(s):  
Shibasis Mukherjee ◽  
Suchana Sain ◽  
Md Nasim Ali ◽  
Rupak Goswami ◽  
N Ravisankar ◽  
...  
Keyword(s):  
Plant Growth ◽  
Seed Treatment ◽  
Low Cost ◽  
Scientific Evidence ◽  
Foliar Spray ◽  
Plant Growth Promoting Rhizobacteria ◽  
Cow Dung ◽  
Beneficial Bacteria ◽  
Traditional Practice ◽  
Microbiological Properties

Abstract Beejamrit is an ancient organic formulation commonly used as a seed treatment in organic and natural farming in India. This low-cost input is primarily composed of cow dung, cow urine, and forest soil, which is often supplemented with limestone. In organic agriculture, it is a traditional practice among the farming community to incubate the seeds in Beejamrit prepared overnight before sowing in the field. However, a lack of substantial scientific evidence has been a major limitation to promote this farmers' innovative practice. On the other hand, growing data suggests that cow-based formulations are mostly enriched with microbial sources, including several plant growth-promoting rhizobacteria that are capable of synthesizing plant growth regulators. However, the microbiological properties of Beejamrit and their temporal changes over different periods of decomposition are largely unexplored. In this study, we aim to analyze the decomposition rate of Beejamrit over 7-consecutive days of incubation. This study further elucidates the microbial niche and their dynamics in Beejamrit, including the plant-beneficial bacteria. It was observed that the population of plant-beneficial bacteria such as the free-living nitrogen fixers and the phosphate solubilizers proliferates progressively up to 4-days of incubation. Similarly, the indolic compounds, including indole acetic acid, were enriched to the highest concentration in Beejamrit after 4-days of decomposition. Together, our analyses establish that Beejamrit provides a dynamic, microbe-based metabolic network and acts as a plant growth regulator. In conclusion, this study recommends the Beejamrit preparation after 4-days of incubation in the seed treatment and foliar spray to receive its optimum benefits.

A novel, green, low-cost chitosan-starch hydrogel as potential delivery system for plant growth-promoting bacteria

2018 ◽  
Vol 202 ◽  
pp. 409-417 ◽  
Author(s):  
J.J. Perez ◽  
N.J. Francois ◽  
G.A. Maroniche ◽  
M.P. Borrajo ◽  
M.A. Pereyra ◽  
...  
Keyword(s):  
Plant Growth ◽  
Delivery System ◽  
Low Cost ◽  
Plant Growth Promoting Bacteria ◽  
Plant Growth Promoting ◽  
Growth Promoting

scholarly journals Triacontanol Promotes the Fruit Development and Retards Fruit Senescence in Strawberry: A Transcriptome Analysis

Plants ◽  
2020 ◽  
Vol 9 (4) ◽  
pp. 488
Author(s):  
Qianqian Pang ◽  
Xueqin Chen ◽  
Jinhua Lv ◽  
Teng Li ◽  
Jinggui Fang ◽  
...  
Keyword(s):  
Plant Growth ◽  
Fruit Development ◽  
Growth And Development ◽  
High Efficiency ◽  
Low Cost ◽  
Sugar Content ◽  
Regulation Mechanism ◽  
Cellular Processes ◽  
Go Enrichment ◽  
Related Enzyme

Triacontanol (TA) is a non-toxic, pollution-free, low-cost, high-efficiency, broad-spectrum plant growth regulator that plays an important role in plant growth and development, but its regulation mechanism of strawberry (Sweet charlie, Fragaria × ananassa Duch.) fruit development is still unclear. In this study, we showed that TA treatment (50 μM) could promote fruit development by up-regulating factors related to fruit ripening-related growth and development. TA increased fruit sugar content and anthocyanin accumulation, and many stress-related enzyme activities. In the meantime, Illumina RNA-Seq technology was used to evaluate the effect of TA treatment on strawberry fruit senescence. The results showed that 9338 differentially expressed genes (DEGs) were obtained, including 4520 up-regulated DEGs and 4818 down-regulated DEGs. We performed gene ontology (GO) enrichment and Kyoto Encyclopedia of Genes and Genomes (KEGG) analysis of these DEGs. The results showed that TA treatment caused changes in transcript levels related to cellular processes, hormones and secondary metabolism, such as DNA metabolic processes, flavonoid synthesis, and plant hormone signal transduction. Bioinformatics analysis showed that many transcription factors were related to fruit maturity. Taken together, this study will provide new insights into the mechanism of strawberry development and postharvest response to TA treatment.

A PCB Technology Moisture Content and Electrical Conductivity Sensor Probe for Agricultural and Horticultural Applications

2014 ◽  
Vol 2014 (DPC) ◽  
pp. 000984-001011
Author(s):  
Robert N. Dean ◽  
Elizabeth Guertal ◽  
Adam Newby ◽  
Glenn Fain
Keyword(s):  
Electrical Conductivity ◽  
Plant Growth ◽  
Moisture Content ◽  
Test Data ◽  
Printed Circuit Board ◽  
Low Cost ◽  
Circuit Board ◽  
Conductivity Sensor ◽  
Irrigation Volume ◽  
Sensor Probe

Commercial printed circuit board (PCB) technology affords the realization of low-cost sensor probes for agricultural and horticultural applications. Plant growth can be optimized when the soil (in field crop applications) or the substrate (in greenhouse crop applications) properties can be measured and properly adjusted. Two important parameters are moisture content and electrical conductivity. Measuring moisture content allows the grower to better time irrigation for most efficient crop growth. Accurate moisture content measurement also allows the grower to apply sufficient irrigation volume for optimum plant growth while avoiding excessive irrigation volume. Likewise, measuring the electrical conductivity reveals useful information regarding ions in the soil or substrate, which can be used to optimize the application of plant nutrients or manage soil salinity. Commercial soil probes are expensive, which limits their widespread use in commercial applications. PCB probes, on the other hand, can be very inexpensive and can quickly be redesigned to modify the form factor for different applications. These sensors make use of the materials and processes inherent in commercial PCB manufacturing, including the FR4 substrate, patterned Cu cladding and soldermask. The non-conductive E-glass FR4 substrate is used as the rigid backbone of the sensor probe. The patterned Cu cladding is used for electrodes and signal traces. The polymeric soldermask is used as a thin insulating and moisture barrier layer. With these materials, insulated fringing field sensors can be realized on the surface of the PCB to measure moisture content, while exposed metal pads on the surface can be used to measure electrical conductivity. Additionally, the PCB probe is directly compatible with the integration of any desired integrated electronic components. Furthermore, the turnaround time for a new PCB sensor design can be as little as 24 hours at modest cost, making this technology economically superior to traditional sensor technologies, such as silicon based MEMS, where it can take months to realize a new design and be very expensive. A prototype sensor probe has been designed, fabricated and evaluated. Test data is analyzed, compared with test data from traditional sensor probes and presented.

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