Using infrared thermometry to manage irrigation water for some vegetable crops

2021 ◽  
Vol 55 (6) ◽  
Keyword(s):  
Irrigation Water ◽  
Vegetable Crops ◽  
Infrared Thermometry

scholarly journals Response of Four Vegetable Crops to Fluridone-treated Irrigation Water

1996 ◽  
Vol 6 (4) ◽  
pp. 396-400
Author(s):  
Stratford H. Kay ◽  
Ross B. Leidy ◽  
David W. Monks
Keyword(s):  
Irrigation Water ◽  
Sweet Corn ◽  
Sandy Loam ◽  
Matter Content ◽  
Bell Pepper ◽  
Loamy Sand ◽  
Vegetable Crops ◽  
Humic Matter ◽  
Zea May ◽  
Aquatic Herbicide

Greenhouse studies examined the effects of an aquatic herbicide (fluridone) in irrigation water on four vegetable crops growing on two soils. Tests on Fuquay loamy sand (0.3% humic matter) and Portsmouth fine sandy loam (4.1% humic matter) examined fluridone concentrations ≤250 μg·L−1. Injury to sweet corn (Zea may L.), cucumber (Cucumis sativus L.), bell pepper (Capsicum annum L.), and tomato (Lycopersicon esculentum L.) on these soils varied with soil type and stage of plant growth. Seedlings or new transplants were more susceptible to fluridone damage than older plants. All plants showed more injury on Fuquay loamy sand, which had the lowest humic matter content. Injury to cucumber occurred only to seedlings exposed to 250 μg·L−1 on the Fuquay loamy sand. Bell pepper was the most sensitive crop to fluridone. The “no observed effects level” below which no significant injury of a crop occurred over both soil types and both stages of crop maturity was 5 μg·L−1 for sweet corn, bell pepper, and tomato and 100 μg·L−1 for cucumber.

scholarly journals Assessment of Irrigation Water Quality in District Attock, Pakistan

2015 ◽  
Vol 58 (1) ◽  
pp. 47-53
Author(s):  
Muhammad Yunas ◽  
Sarfraz Ahmad ◽  
Bashir Ahmad ◽  
Obaid ur Rehman ◽  
Sher Afzal
Keyword(s):  
Water Quality ◽  
Irrigation Water ◽  
Water Samples ◽  
Analysis Data ◽  
Sodium Adsorption Ratio ◽  
Residual Sodium Carbonate ◽  
Vegetable Crops ◽  
Irrigation Water Quality ◽  
Irrigation Purpose ◽  
Maximum Range

Water samples (total 277) were collected during previous three years (2008-09 to 2010-11) from all tehsils of Attock district, Pakistan, used for irrigation purpose. Regarding sources of irrigation, 122 samples were collected from bores (turbine operated), 97 from wells, 19 from nullahs and 39 from dams. The analysis data showed that 120 samples (43%) were fit, 35 samples (13%) were marginally fit, while 122 samples (44%) were unfit. As regards minimum and maximum range, it varied in EC from 0.05 to 8.1 dS/m, calcium plus magnesium from 0.6 to 70 meq/L, sodium from zero to 40.6 meq/L, carbonates from zero to 0.04 meq/L, bicarbonates from 0.5 to 15 meq/L, chlorides from 0.2 to 70 meq/L, sodium adsorption ratio from zero to 49.85 and residual sodium carbonate from zero to 13 meq/L. Recommendations for wise and judicious use of marginally fit to unfit irrigation water were imparted to the farmers for raising different arable, fruit and vegetable crops. 

scholarly journals Physiological Responses of Pepper to Salinity and Drought

2003 ◽  
Vol 128 (1) ◽  
pp. 48-54 ◽  
Author(s):  
Stefania De Pascale ◽  
Celestino Ruggiero ◽  
Giancarlo Barbieri ◽  
Albino Maggio
Keyword(s):  
Drought Stress ◽  
Salt Tolerance ◽  
Irrigation Water ◽  
Saline Water ◽  
Dry Weight ◽  
Dry Matter Accumulation ◽  
Vegetable Crops ◽  
Marketable Yield ◽  
Saline Irrigation ◽  
Root Shoot Ratio

Production of vegetable crops can be limited by saline irrigation water. The variability of crop salt tolerance under different environmental conditions requires species-specific and environment-specific field evaluations of salt tolerance. Data on field performances of vegetable crops grown on soils that have been irrigated with saline water for many years are lacking. In this study we analyzed the long-term effect of irrigation with saline water on soil properties and on responses of field-grown pepper (Capsicum annuum L.) plants in these soils. Yield, gas exchanges, water relations, and solute accumulation were measured in plants grown under three different irrigation treatments: a nonsalinized control (ECw = 0.5 dS·m-1) and two concentrations of commercial sea salt, corresponding to ECw of 4.4 and 8.5 dS·m-1, respectively. In addition, a nonwatered drought stress treatment was included. Irrigation water with an EC of 4.4 dS·m-1 resulted in 46% reduction in plant dry weight (leaves plus stem) and 25% reduction in marketable yield. Increasing the electrical conductivity of the irrigation water to 8.5 dS·m-1 caused a 34% reduction in plant dry weight and a 58% reduction in marketable yield. Leaf and root cellular turgor and net CO2 assimilation rates of leaves in salt-stressed plants decreased along with a reduction in leaf area and dry matter accumulation. High concentrations of Na+ and Cl- in the irrigation water did not significantly alter the level of K+ in leaves and fruit. In contrast, drought stressed plants had higher concentrations of leaf K+ compared to well watered control plants. These results indicate that Na+ and K+ may play similar roles in maintaining cellular turgor under salinity and drought stress, respectively. The regulation of ion loading to the shoots was most likely functionally associated with physiological modifications of the root/shoot ratio that was substantially smaller in salinized vs. drought stressed plants. From an agronomic perspective, irrigation with moderately saline water (4.4 dS·m-1) it is recommendable, compared to no irrigation, to obtain an acceptable marketable yield in the specific environment considered.

scholarly journals Monitoring the Influence of Anthropogenic Pollution on the Quality of Irrigation Water for Market Gardening in Yamoussoukro, Côte d’Ivoire

2021 ◽  
Author(s):  
Tchimonbié Messikely Anoman ◽  
Don-Rodrigue Rosin Bi Voko ◽  
Dabé Doga ◽  
Aka Niangoran Marie Stephanie Kouadio ◽  
Konan Samuel Ahoudjo ◽  
...  
Keyword(s):  
Irrigation Water ◽  
Microbiological Quality ◽  
Anthropogenic Pollution ◽  
Strongly Correlated ◽  
Vegetable Crops ◽  
E Coli ◽  
Lake System ◽  
Pollution Indicator ◽  
Lake Waters

Background: The microbiological quality of three vegetable crops (cabbages, carrots, lettuces) and their irrigation water from the lake system of the city of Yamoussoukro were studied. The pollution indicator used is Escherichia coli (E. coli), of the thermotolerant coliform family. Methods: During the period 2017-2019, in four dry and four wet seasons, a total of 744 water samples and 13392 vegetable samples were collected in five (5) lakes belonging to the lake system. The lakes were selected because of their position in the system. The E. coli loads were evaluated after isolation on a specific COMPASS ECC Agar and confirmed with Polymerase chain reaction (PCR) and the physicochemical parameters of the lakes, evaluated according to their respective ISO standards. Result: In irrigation waters, bacterial loads and physico-chemical parameters generally have evolved from the upstream lakes to those downstream of the lake system (from lake A to lake E). Values were higher during the rainy seasons. E. coli loads on vegetables were strongly correlated with those of irrigation water, especially in dry seasons. Spearman’s correlations revealed significant correlations between turbidity, DOC and bacterial loads. The risk of bacterial transmission between lake waters and surrounding vegetables is proven.

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