Development of Critical Limits for Different Crops Grown in Different Soils and Its use in Optimizing Fertilizer Rates

Prasad, P. R. K.; Subbarayappa, C.T.; Reddy, M. Raghavendra; Meena, Hari Mohan

doi:10.20546/ijcmas.2017.606.029

Cited by 9 publications

(7 citation statements)

References 7 publications

(7 reference statements)

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“…Moreover, it can be generally assumed that the plant nutrient ratios may provide a better index of deficiency of macronutrients than their concentration [8]. In the literature there are very different and broad ranges of nutrient contents given as an optimal and critical levels for crops [30,31]. Different situation one can notice in relation to the nutrients ratios where values are clearly defined, irrespective of the plants or the fertilization used.…”

Section: Discussionmentioning

confidence: 99%

Quantitative Changes in Various Nutrient Ratios in Fodder Plants as an Effect of Compost and Fly Ash Application

Jakubus

Graczyk

2022

IJERPH

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Despite the popularity of concentrated feed, fodder crops are still important, especially in organic livestock farming. However, this type of feed must meet certain criteria, which are often described using correct nutrient ratios. The research investigates the influence of compost and fly ash on quantitative changes in nutrient ratios determined for lupine and oat cultivated on soil slightly contaminated with Cu. A pot experiment was conducted on medium soil. Immobilizing agents (compost and fly ash) were applied at the dose of 40 t per ha. Plant materials were subjected to chemical analyses to assess their macronutrient content and, based on these data, mutual proportions of individual nutrients were calculated as mass ratios of K:Mg, K:Na, Ca:P, Ca:Mg, K:(Ca+Mg) and (K+Na):(Ca+Mg). Changes in ratio values were visualized using statistical tools, i.e., Anova, correlation coefficients and dendrograms. It was found that immobilizing agents constituted a source of the chosen nutrients because their amounts in plants grown on the soil fertilized with either compost or fly ash compost were significantly higher than in the control plants. This phenomenon was especially visible with regard to Ca and Mg for both lupine and oat. It should be emphasized here that the effect of compost or fly ash on the content of Ca and K in plants was comparable. In general, the application of compost contributed to higher values of the analyzed nutrients in both plants. The control and fertilized fly ash plants were characterized by lower values of nutrient ratios. The expected optimal value range of 2–3:1 was determined only for Ca:Mg, which was found in both lupine and oats. The proper values of K:Mg (2–6:1) were found only in the case of fodder plants cultivated on soil amended with compost.

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Section: Discussionmentioning

confidence: 99%

Quantitative Changes in Various Nutrient Ratios in Fodder Plants as an Effect of Compost and Fly Ash Application

Jakubus

Graczyk

2022

IJERPH

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“…The critical level of nutrients in soil was derived by plotting the nutrient on 'X' axis and Bray's percent yield on 'Y' axis as described by Prasad et al [36]. A cross is placed over the data and moved to the upper left and lower right to have a minimum number of points, as suggested by Cate and Nelson [35].…”

Section: Bray's %Yield =mentioning

confidence: 99%

“…The pairs of soil test values and relative yield were kept in order throughout the analyses [39,40]. According to Siva Prasad et al [36], the correction factor (C.F.) and a total corrected sum of squares (T.C.S.S.)…”

Section: Determination Of Critical Limit Of Mn Using the Statistical ...mentioning

confidence: 99%

Critical Limit of Manganese for Soybean in Soils of Three Agro-Ecological Zones of Bangladesh

Rashed,

Jahangir,

Hashem

et al. 2023

Sustainability

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Manganese (Mn) is an essential micronutrient for plants, which influences multiple physiological systems. Determination of the critical limit (CL) of Mn in the soil is necessary for Mn fertilizer application as this limit delineates the deficiency, optimum, and toxicity ranges of Mn. A pot experiment was performed in the winter season with 20 soils collected from three Agro-Ecological Zones (AEZs) of Bangladesh to determine the CL of Mn for soybean (Glycine max L.). Manganese was applied in soil @ 0, 1, 2, and 4 ppm, and the experiment was laid out in a factorial and completely randomized design with three replications. The CL of Mn was determined by the Cate-Nelson graphical and statistical approach and was found 3.60 and 3.55 µg g−1, respectively. Applying 1 µg g−1 Mn in soil significantly enhanced root and shoot weight, as well as seed yield of soybean compared to no Mn application. In field conditions, a significant positive response of soybean yield was found up to the CL of Mn. The findings of the study could help predict possible Mn deficiency in soil and soybean response to Mn fertilizer, which is important in decision-making for efficient fertilizer management practices to ensure the yield potential of soybeans.

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“…Defining and redefining of critical limits for different soils with reference to growing environment, soil characteristics and plant parts of specific crops need to be done regularly. The critical limits enable the farmers to apply balanced nutrients to get maximum yield potential of crops (Prasad et al 2017).…”

Section: Critical Limits Of Micronutrientsmentioning

confidence: 99%

Road to successful floriculture through soil micronutrient mapping of different zones of India

et al. 2021

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The present scenario for natural resource conservation demands for crop diversification and efficient management of natural resources, viz. water, nutrient, soil. The horticultural crops are always looked upon for diversification and within horticultural crops; fruits and vegetables are given prime importance for nutritional value and high outputs. Floricultural crops have emerged as potent livelihood crops for small and marginal farmers, employment for youth with low inputs, crop diversification and natural resource management. The improper use of inputs, viz. fertilizer and water in floral crops limits their production and can adversely affect soil health. So floriculturists should work on this least attended area and recommend appropriate fertilizers to flower growers for good quality production. In comparison to other crops, the nutrient requirement of floral crops is more due to which they scavenge more nutrients from soil so large amount of these nutrients are needed to replenish the soil to maintain balance. The critical limits of micronutrients for different agronomic crops have been developed and same are used for floricultural crops too but as requirement of these crops is higher so critical limits for floral crops need to be developed. Keeping in view all above, an attempt has been made to map micronutrient status of major flower producing states that could be used in management of micronutrient requirement of different floral crops. This will further help in development of policies pertaining to sound micronutrient management packages and precision fertilization in floriculture.

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Development of Critical Limits for Different Crops Grown in Different Soils and Its use in Optimizing Fertilizer Rates

Cited by 9 publications

References 7 publications

Quantitative Changes in Various Nutrient Ratios in Fodder Plants as an Effect of Compost and Fly Ash Application

Quantitative Changes in Various Nutrient Ratios in Fodder Plants as an Effect of Compost and Fly Ash Application

Critical Limit of Manganese for Soybean in Soils of Three Agro-Ecological Zones of Bangladesh

Road to successful floriculture through soil micronutrient mapping of different zones of India

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