article · Agriculture
Poor soil organic matter and micronutrient deficiencies often restrict tomato yields. This research evaluated the effects of combining various application rates of potassium humate with a micronutrient mixture containing zinc, boron, and iron across autumn and spring growing seasons. Adding potassium humate at rates up to 15 kilograms per hectare alongside micronutrient treatments improved overall tomato yield, plant biomass, and the harvest index. Specifically, higher potassium humate levels increased fruit yield by over seven percent and enhanced iron uptake, though zinc and boron fruit concentrations were unaffected at the highest combined application rate. Overall, combining potassium humate at ten to fifteen kilograms per hectare with seventy-five to one hundred percent of the tested micronutrient blend proved effective at boosting crop production, plant biomass, and micronutrient absorption.
Tomatoes are widely consumed fresh and processed, yet crop productivity frequently suffers from poor soil fertility and nutrient shortages. Identifying optimal blends of soil amendments and essential micronutrients provides farmers with practical management strategies. This approach supports better crop performance, enhances plant biomass, and aids in delivering more consistent agricultural output on nutrient-deficient soils.
This work demonstrates an applied, field-tested approach for commercial vegetable growers and fertiliser manufacturers. Formulations combining potassium humate at specific rates with zinc, boron, and iron can be integrated into existing crop management programmes to raise tomato yields. Because specific dosage rates were tested across two seasons, the findings represent applied research that is close to practical adoption by farmers seeking to correct soil deficiencies.
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The deficiency of micronutrients and low organic matter (OM) status of soils are major hurdles in the optimum crop yield achievements. Humic substances can play an imperative role in the micronutrient bioavailability and improved crop yield by ameliorating the physicochemical soil properties. consumed as fresh food and in processed form. However, its susceptibility towards micronutrient deficiency causes a significant reduction in yield. That is why a current study was done to examine the influence of different potassium humate (KH) levels, i.e., 0, 5, 10, and 15 kg ha−1 with micronutrients mixture (MC), i.e., 0, 50 (Zn = 2.50, B = 0.75, Fe = 2.50 kg ha−1), 75 (Zn = 3.75, B = 1.125, Fe = 3.75 kg ha−1) and 100% (Zn = 5.0, B = 1.5, Fe = 5.0 kg ha−1) on the yield, biomass, harvesting index and uptake of the micronutrients in tomato. The results showed that increasing the level of K-humate significantly improved the yield (7.4 and 7.17%), total biomass (6.38 and 6.59%), and harvesting the index (0.46 and 0.76%) of tomato. It also enhanced Fe uptake but did not affect B and Zn concentrations in the tomato fruit at 100% MC + 15 kg ha−1 KH over control in the autumn and spring seasons. In conclusion, both levels of K-humate 10 and 15 kg ha−1 and MC 75 and 100% effectively enhance the yield, biomass, harvesting the index, and micronutrients (B, Zn, and Fe) uptake in tomatoes.
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DOI: 10.3390/agriculture11040357
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