Sulphur status in agricultural soils determined using the Mehlich 3 method

Zbíral, Jíří; Smatanová, Michaela; Němec, Pavel

doi:10.17221/142/2018-pse

Cited by 12 publications

(3 citation statements)

References 16 publications

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“…Finally, and in the case of Europe, S fertilization needs have increased as inputs through atmospheric deposition or fertilizers have decreased substantially [71]. S concentrations in the maize soils of the CC mixtures were classified as very low or low (Table 4a) [72], but we did not find a satisfactory explanation for this last phenomenon.…”

Section: Relationship Between Maize Biomass and Soil Variablesmentioning

confidence: 63%

Maize and Wheat Responses to the Legacies of Different Cover Crops under Warm Conditions

et al. 2023

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Cover crops (CC) have great potential to enhance the sustainability of agroecosystems. However, the wide range of possible rotations of CC and cash crops (CaC) means that important knowledge gaps persist on how CC affects CaC. We investigated the legacy effects of five common CC (three monocultures: vetch, melilotus, and barley, and two mixtures: barley-vetch and barley-melilotus) on two of the most important CaC, maize and wheat. A microcosm, semi-controlled experiment was established simulating warm, low-income Mediterranean conditions. After two cycles, soil physicochemical and microbial properties, as well as plant growth and nutrition variables, were measured at the CC early growth CaC stage. In maize, barley CC had the best soil microbial and nutritional legacy effects, which resulted in the highest biomass and nutrient status. In contrast, barley produced the worst results on wheat, showing the disadvantages of growing two crops from the same tribe consecutively. CC mixtures also did not offer a productive advantage over pure CC. Additionally, our findings suggest that archaea seem to play a role in increasing N and Zn content in maize shoots. Furthermore, shoot B contents showed highly significant regressions with the CaC biomass. These results can help select the appropriate CC in each case.

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Section: Relationship Between Maize Biomass and Soil Variablesmentioning

confidence: 63%

Maize and Wheat Responses to the Legacies of Different Cover Crops under Warm Conditions

et al. 2023

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“…According to guidelines elaborated for acid soils analyzed by Bray method, available P was medium in Kismatari soil [18]. According to Mehlich III method [19], available K (mg.kg -1 60); Mg (mg.kg -1 ) was high (> 40); Ca (mg.kg was high (> 1 050 for silt loam soils); S (mg.kg was low (<20); Boron, Zn, and OM were low; Cu, Fe, and Mn were medium in the Kismatari soil. However, for cereal crops Cu < 2.0 mg.kg recommended.…”

Section: Soil Analysismentioning

confidence: 99%

Determining Appropriate Fertilizer Scheme for Maize and Sorghum Cultivation in the Sahel Agroecological Zone of Cameroon

Temegne

Ngome

Suh

et al. 2020

JEAI

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The objective of this study was to investigate appropriate fertilization schemes to improve the production of maize and sorghum in the Sahel agroecological zone of Cameroon. The experiment was carried out in 2018 at IRAD (Institute of Agricultural Research for Development) Kismatari experimental field. The experimental setup was a complete randomized block design in four replicates and four treatments for each crop. For maize, treatments were: T1 (No input), T2 (100 kg NPK + 100 kg Urea.ha-1), T3 (150 kg NPK + 150 kg Urea.ha-1), and T4 (200 kg NPK + 200 kg Urea.ha-1). For sorghum, treatments were: T1 (No input), T2 (50 kg NPK + 50 kg Urea.ha-1), T3 (100 kg NPK + 100 kg Urea.ha-1), and T4 (150 kg NPK + 150 kg Urea.ha-1). All fertilizer treatments NPK and urea were applied to both crops respectively at 3 and 5 weeks after sowing. Nine weeks after sowing, the plant height was highest at T3, following by T2 and T4 for the two crops. The treatment T1 exhibited the lowest grain yield while T2 and T3 showed intermediate grain yield. The treatment T4 produced the highest biomass, number of ears.plant-1, and grain yield (maize: 3.3 t. ha-1, sorghum: 2.9 t.ha-1) for the two crops and thus appears to be the most appropriate fertilizer recommendation for maize and sorghum production in the Sahel zone. However, costs-benefits studies for the use of fertilizer NPK and urea are warranted to facilitate adoption by farmers in the agroecological zone.

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“…In the last 30 years, many countries have significantly reduced SO 2 emissions into the atmosphere. This process caused a decrease in the supply of S to the soil and, in consequence, a decrease in the content of the available soil sulfur [34]. Phosphorus resources in the arable soils of countries with intensive crop production are large, so the effectiveness of the so-called freshly applied phosphorus is low [35].…”

Section: Introductionmentioning

confidence: 99%

Productivity of Nitrogen Accumulated in Alfalfa–Grass Sward Cultivated on Soil Depleted in Basic Nutrients: A Case Study

et al. 2023

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The productivity of fodder legumes, based on internal sources of N, may be limited due to an insufficient supply of nutrients responsible for the efficient use of N accumulated by the crop during the growing season. Production risk occurs on soils that are naturally poor or depleted in nutrients that are decisive for the fixation and utilization of N2 by alfalfa. This hypothesis was validated on the basis of a field experiment with an alfalfa–grass mixture carried out over three main seasons (2012−2014) on soil low in available potassium (K), calcium (Ca), and sulfur (S). The experiment involved two factors that contained two levels of applied gypsum (GYP: 0, 500 kg ha−1) fertilized with P and K (POT: absolute control—AC, P60K0, P60K30, P60K60, and P60K120). In each main season of the alfalfa–grass mixture, the sward was mowed three times (three cuts). The total sward yield (TY) reached its maximum in the second main season (15.6 t DW ha−1), then it significantly decreased. The sward yield of the third cut was the main driver of the TY. The content of P in the first cut, and especially P and S in the third cut of the sward, affected the N:P and P:S ratios, which, in turn, determined the productivity of the alfalfa–grass mixture. The total amount of accumulated N (TN) in the sward significantly responded to gypsum and PK fertilizers. In the first and third main seasons, the highest TN was found on the plot fertilized with both gypsum and 120 kg K2O ha−1. In the second main season, the TY was determined by PK dose, being variable in successive years. The highest total N accumulation (TN) was recorded in the second main season. It reached 504 kg N ha−1 on the plots with GYP−0 and 436 kg N ha−1 for GYP−500. However, the corresponding TY was 16.7 and 17.3 t DW ha−1. This apparent discrepancy was due to the much higher productivity of N, which was 33.2 and 39.6 kg fodder DW ha−1 TN, respectively. These two characteristics clearly indicate that the productivity of the accumulated N by the alfalfa–grass sward was significantly restricted by the shortage of P and S. The studies clearly emphasized that the sward of the alfalfa–grass mixture grown on soil depleted in available K, Ca, and S responds significantly to the combined application of gypsum and potassium, but provides effective control of the P supply, even on soil rich in available P.

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Sulphur status in agricultural soils determined using the Mehlich 3 method

Cited by 12 publications

References 16 publications

Maize and Wheat Responses to the Legacies of Different Cover Crops under Warm Conditions

Maize and Wheat Responses to the Legacies of Different Cover Crops under Warm Conditions

Determining Appropriate Fertilizer Scheme for Maize and Sorghum Cultivation in the Sahel Agroecological Zone of Cameroon

Productivity of Nitrogen Accumulated in Alfalfa–Grass Sward Cultivated on Soil Depleted in Basic Nutrients: A Case Study

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