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Entry Date
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Location
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Thursday, June 20, 2024
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Matt D.
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Connecticut
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Entry 75 of 76 |
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Maximum Target Levels
This shows the upper target levels when it comes to mixing fertilizer for the pumpkin plant.
Conductivity: Most growers are using EC (electrical conductivity) as this is a universal unit the only issue is that it is not as exact as ppm (parts per million) and growers can more easily over shoot when using EC as it takes greater conductivity to move this value. Ppm moves easier so it makes slight changes noticeable. It is also important to know this monitor uses the ppm based on the EC*700 and if you want the TDS conversion it is ppm*500.
In short this means that 450ppm = 0.6 EC
Temperature: There is not much control over this, but 74F (23C) is a good root zone temperature to allow for efficient absorption
pH: Goal is to have this in the 6.5-7.5 range. While 7.5 is on the high side, since the soil tends to be acidic having a slightly basic solution will help ensure the soil level is not driven even further acidic during the season.
EC to PPM Conversion Chart: https://www.perfectgrower.com/knowledge/knowledge-base/ec-to-ppm-conversion-chart/
While meters do not measure only nitrogen, this is an important nutrient to manage and according to this study on tomatoes… “Nitrogen fertilizer plays a pivotal role in influencing the growth and development of tomato plants.” And they also recommend “growers should consider using nitrate nitrogen (NN) and urea nitrogen (UN) to reduce ammonium nitrogen (AN) application in tomato fertilization.
Effects of Different Forms and Proportions of Nitrogen on the Growth, Photosynthetic Characteristics, and Carbon and Nitrogen Metabolism in Tomato :
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10748299/pdf/plants-12-04175.pdf
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