Assessing the availability of potassium and its quantity-intensity relations under long term conservation agriculture based cereal systems in North-West India

Rani, Khushboo; Datta, Ashim; Jat, H.S.; Choudhary, Madhu; Sharma, Parbodh Chander; Jat, M.L.

doi:10.1016/j.still.2023.105644

Cited by 8 publications

(3 citation statements)

References 57 publications

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“…The relative change presumes an equilibrium between soil solution and solid active surfaces. If a given amount of soil is equilibrated with a known amount of P or K in the absence of sink factors (uptake, leaching immobilization), the remaining nutrients in soil solution after equilibration will serve as an index of labile and or potential P or K (these terms in the current study will be used interchangeable) (El Attar et al., 2022; Gichangi & Mnkeni, 2009; Meyer et al., 2023; Rani et al., 2023). The value of potential or labile P should be symmetrical with crop response when P is limiting.…”

Section: Introductionmentioning

confidence: 99%

Calibration accuracy of requirement factor and sorption studies for fertilizer recommendation

Mbangi

Nongqwenga

Mabhaudhi

2023

Agrosystems Geosci & Env

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The inconsistent and incoherent approaches by fertilizer recommendations to index crop response has prompted the search for alternative approaches. Some of the problems stem from the overlooking of fundamental soil properties that govern the soil solution, which is where plant roots absorb nutrients for growth. A comparison was made between two contrasting equilibration techniques to evaluate their precision in estimating crop response. Sorption isotherms for phosphorus (P) and potassium (K) were compared to requirement factors. Phosphorus sorption isotherms were determined following the batch equilibration technique. Potassium was developed following equilibration with graded K levels. The requirement factors of both P and K were determined following a 6‐week incubation with four different levels of fertilization. Cowpea (Vigna unguiculata), mustard (Brassica juncea), and maize (Zea mays) were used as test crops. The growth parameters measured included biomass (g), height (cm), and leaf area index. At harvest, yield (g pot−1) and uptake (mg pot−1) were also recorded. Linear correlation studies were carried out to evaluate the association between treatments and the growth parameters of the tested crops. Results showed no significant difference (p < 0.05) in maize growth parameters between the equilibration methods, despite the sorption isotherms estimating higher levels of P and K. The sorption isotherms for P and K were 1.7 and 9.8 times higher than their respective requirement factors. The crop response, although relatively similar in both methods, was weakly correlated with the sorption‐estimated nutrient levels, indicating an overestimation of nutrients. Therefore, the requirement factors were deemed to be a more precise equilibration technique for estimating nutrient levels.

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Section: Introductionmentioning

confidence: 99%

Calibration accuracy of requirement factor and sorption studies for fertilizer recommendation

Mbangi

Nongqwenga

Mabhaudhi

2023

Agrosystems Geosci & Env

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“…It is largely concerned with soil, water and agricultural resource management in order to promote economically, environmentally and socially viable agricultural output [4]. Conservation agriculture practices are gradually gaining traction as an alternative to conventional agricultural practices for controlling difficulties caused by conventional tillage practices, hence lowering overall output costs [5]. "Traditional intensive agriculture practices were successful in meeting production targets in the second half of the twentieth century, but they also resulted in severe deterioration of natural resources, putting the agricultural production potential of these resources in jeopardy for future generations" [6].…”

Section: Introductionmentioning

confidence: 99%

Influence of Different Residue Retention and Nutrient Levels on Crop Productivity of Soybean (Glycine max L.) under Conservation Agriculture

Parmar,

Vishwakarma,

Gupta

et al. 2023

IJPSS

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During the kharif season of 2020-22, a field experiment with soybean in a soybean-wheat cropping system was conducted at the ICAR-Indian Institute of Soil Science, Bhopal, (M.P.) to assess the effect of different levels of crop residue retention treatments and nutrient doses on growth parameters, physiological indices, yield attributes, yield and profitability of soybean. The experiment was laid out with Factorial Randomized Block Design (FRBD) comprised of 16 combinations of 4 residue level (0%, 30%, 60% and 90%) and 4 nutrient doses (N1-RDF (120:60:40 kg N, P2O5 and K2O ha-1), N2-75% N+100% P2O5 and K2O ha-1, N3-75% P2O5+100% N and K2O ha-1, N4-75% K2O+100% N and P2O5 ha-1) with 3 replication under ongoing CRP-CA (Consortium Research Platform on Conservation Agriculture). The result showed that growth parameters, physiological indices as well as yield, yield attributes and profitability were significantly higher in 90% than other crop reside retention treatment. The higher (90%) crop residue retention resulted in 16% higher grain yield, 16.88% stover yield and 17.55% higher profitability then without residue treatment. Among different nutrient doses 100% RDF showed significantly higher growth and better physiological indices at all the growth stages. Significantly higher seed (1226 kg ha-1) and stover (2274 kg ha-1) yields were recorded with 100% RDF with any other management practices.

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“…However, there is lack of clear understanding on how conservation agriculture behaves under organic nutrient managements in terms of soil quality improvement and crop yield sustainability. While there have been previous studies on nutrient and tillage management practices in rice-rice (Yadav et al, 2017), rice-wheat (Jha et al, 2023;Dhaliwal et al, 2023a) and maize-wheat (Pramanick et al, 2022;Rani et al, 2023) cropping systems in India, their integrative effect on soil properties and system productivity in soybean-wheat cropping systems remains unexplored. To address these gaps, a two-year field investigation was carried out to examine the impact of conservation, organic, and conventional crop management practices on (i) soil physical and chemical properties, (ii) yield and system productivity, and (iii) key drivers of system productivity in soybeanwheat cropping systems.…”

Section: Introductionmentioning

confidence: 99%

Tillage-based nutrient management practices for sustaining productivity and soil health in the soybean-wheat cropping system in Vertisols of the Indian semi-arid tropics

Meena

Sharma

Singh

et al. 2023

Front. Sustain. Food Syst.

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To achieve higher crop production in a soybean-wheat cropping system, comprehensive knowledge of soil fertility status and its variability is crucial. However, a significant gap exists between the potential and actual productivity of this system in the Vertisols of Indian semi-arid tropics. Therefore, 2 years of field research were conducted to investigate how different crop management practices affect soil fertility in this cropping system. The trial was conducted using a randomized complete block design (RCBD) with five crop management practices: CAO (conservation tillage + organic nutrient and weed management), CAC (conservation tillage + chemical nutrient and weed management), CTC (conventional tillage + chemical nutrient and weed management), OCT (conventional tillage + organic nutrient and weed management), and PoPs (package of practices). Results showed that CAO significantly (p < 0.05) increased soil organic C (6.8 g kg−1), available N (129.5 mg kg−1), P (11.0 mg kg−1), K (232.6 mg kg−1), Fe (9.17 mg kg−1), and Mn (10.48 mg kg−1) at topsoil (0–15 cm) and deeper layers (15–60 cm). In contrast, CAC had significantly (p < 0.05) higher soil availability of Ca (5,072 mg kg−1) and Mg (901 mg kg−1) and Cu (0.84 mg kg−1). On the other side, PoPs resulted in the highest S (10.05 mg kg−1) and Zn (0.85 mg kg−1) availability in the topsoil. Our results evidently suggested S and Zn availability as key indicators of soil health sustenance in the present agroecosystem. Notably, CAC had significantly (p < 0.05) higher system productivity (4.62 t ha−1) than the other treatments, showing a 14.0, 6.3, and 18.2% increase over CAO, CTC, and OCT, respectively. Based on the results, it is recommended that CAC is a better option for achieving higher system productivity, while CAO is the best option for ensuring long-term sustainability of soil fertility. The findings of this study could be useful for farmers and agricultural researchers in designing efficient crop management practices to improve the productivity and sustainability of soybean-wheat cropping system in arid to semiarid ecology.

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Assessing the availability of potassium and its quantity-intensity relations under long term conservation agriculture based cereal systems in North-West India

Cited by 8 publications

References 57 publications

Calibration accuracy of requirement factor and sorption studies for fertilizer recommendation

Calibration accuracy of requirement factor and sorption studies for fertilizer recommendation

Influence of Different Residue Retention and Nutrient Levels on Crop Productivity of Soybean (Glycine max L.) under Conservation Agriculture

Tillage-based nutrient management practices for sustaining productivity and soil health in the soybean-wheat cropping system in Vertisols of the Indian semi-arid tropics

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