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The carrot is a biennial plant in the umbellifer family, Apiaceae. World production of carrots (combined with turnips) for 2022 was 42 million tonnes, led by China producing 44% of the total. The characteristic orange colour is from beta-carotene, making carrots a rich source of vitamin A.
Research at this station suggests that by matching the use of nitrogen fertilizers to the type of soil in which carrots are grown, high yields may be achieved. Moreover, this can be done with less nitrogen fertilizer and minimizing the use of fungicides to control leaf blight, decreasing costs and mitigating some environmental concerns. [8]
Boron is highly soluble in the form of borax or boric acid and is too easily leached from soil making these forms unsuitable for use as a fertilizer. Calcium borate is less soluble and can be made from sodium tetraborate. Boron is often applied to fields as a contaminant in other soil amendments but is not generally adequate to make up the rate ...
Tithonia diversifolia can be used as organic fertilizer biomass. The biomass refers to materials that are derived from the plant, such as its foliage, being worked into the soil as a dry fertilizer. [26] Since its use as fertilizer requires high labour, it is recommended for use with high value crops such as tomato, kale, carrot, and maize. [27]
Similarly, in 2004, laboratories began providing fertilizer recommendations along with the soil composition report. Lab tests are more accurate and often utilize very precise flow injection technology (or Near InfraRed (NIR) scanning [6] [7]). In addition, lab tests frequently include professional interpretation of results and recommendations.
Slow- or controlled-release fertilizer: A fertilizer containing a plant nutrient in a form which delays its availability for plant uptake and use after application, or which extends its availability to the plant significantly longer than a reference ‘rapidly available nutrient fertilizer’ such as ammonium nitrate or urea, ammonium phosphate ...
In many situations, however, a soil-, seed- or foliar application of a Mo fertilizer is far more cost-effective than the use of lime to increase Mo availability. Sodium molybdate is a typical source of Mo. Typical soil and foliar application rates are 50–200 g Mo ha −1; recommended rates for seed treatment range from 7–100 g Mo ha −1. [1]
Therefore, pure KCl is 39.09/(39.09 + 35.45) = 52% potassium and 48% chlorine by weight. Its K value is therefore 52/0.83 = 63; that is, a fertilizer that gets all its potassium from K 2 O and has the same potassium contents as pure KCl would have to be 63% K 2 O. Pure KCl fertilizer would thus be labeled 0-0-63.
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