Achieving Sustainability in Food Systems: Addressing Changing Climate through Real Time Nitrogen and Weed Management in a Conservation Agriculture-Based Maize–Wheat System
Abstract
:1. Introduction
2. Materials and Methods
2.1. Experimental Site
2.2. Experiment Details
2.3. Crop Management
2.4. Weed Management
2.5. Weed Observation
2.6. Physiological Observation and Yield
2.7. Nutrient Management and GWP Estimation
2.8. Statistical Analysis
3. Results
3.1. N Application and Global Warming Potential in Maize and Wheat
3.2. Weed Interference in Maize
3.3. Weed Interference in Wheat
3.4. Weed Community Composition and NLW: BLW Ratio in Maize and Wheat
3.5. Physiological Parameters and Agronomic Productivity of Maize and Wheat
3.6. Fitted Linear Regression Analysis between Agronomic Productivity and Weed Interference
4. Discussion
4.1. Optical Crop Sensor Based N Use and Global Warming Potential
4.2. Weed Interference in Maize and Wheat
4.3. Weed Community Composition and NLW: BLW Ratio in Maize and Wheat
4.4. Physiological Parameters and Agronomic Productivity of Maize and Wheat
4.5. Agronomic Productivity and Weed Interference
5. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Acknowledgments
Conflicts of Interest
References
- Anonymous. Conservation Agriculture|The International Maize and Wheat Improvement Center (CIMMYT). 2021. Available online: https://www.cimmyt.org/Cimmyt.org (accessed on 12 January 2021).
- Parihar, C.M.; Jat, S.L.; Singh, A.K.; Kumar, B.; Pradhan, S.; Pooniya, V.; Dahuja, A.; Chaudhary, V.; Jat, M.L.; Jat, R.K.; et al. Conservation agriculture in irrigated intensive maize-based systems of north-western India: Effects on crop yields, water productivity and economic profitability. Field Crops Res. 2016, 193, 104–116. [Google Scholar] [CrossRef]
- Singh, M.; Sidhu, H.S.; Humphreys, E.; Thind, H.S.; Jat, M.L.; Blackwell, J.; Singh, V. Nitrogen management for zero till wheat with surface retention of rice residues in north-west India. Field Crops Res. 2015, 184, 183–191. [Google Scholar] [CrossRef]
- Das, T.K.; Saharawat, Y.S.; Bhattacharyya, R.; Sudhishri, S.; Bandyopadhyay, K.K.; Sharma, A.R.; Jat, M.L. Conservation agriculture effects on crop and water productivity, profitability and soil organic carbon accumulation under a maize-wheat cropping system in the North-western Indo-Gangetic plains. Field Crops Res. 2018, 215, 222–231. [Google Scholar] [CrossRef]
- Gharde, Y.; Singh, P.K.; Dubey, R.P.; Gupta, P.K. Assessment of yield and economic losses in agriculture due to weeds in India. Crop Prot. 2018, 107, 12–18. [Google Scholar] [CrossRef]
- Susha, V.S.; Das, T.K.; Nath, C.P.; Pandey, R.; Paul, S.; Ghosh, S. Impacts of tillage and herbicide mixture on weed interference, agronomic productivity and profitability of a maize–wheat system in the Northwestern IGPs. Field Crops Res. 2018, 219, 180–191. [Google Scholar] [CrossRef]
- Ali, A.M.; Abou-Amer, I.; Ibrahim, S.M. Using Optical crop sensor active optical sensor for optimizing maize nitrogen fertilization in calcareous soils of Egypt. Arch. Agron. Soil Sci. 2018, 64, 1083–1093. [Google Scholar]
- Ramesh, K.; Matloob, A.; Aslam, F.; Florentine, S.K.; Chauhan, B.S. Weeds in a Changing Climate: Vulnerabilities, Consequences, and Implications for Future Weed Management. Front. Plant Sci. 2017, 8, 95. [Google Scholar] [CrossRef] [PubMed]
- Sarangi, D.R.; Sahoo, T.R.; Sethy, S.; Chourasia, M.; Prasad, S.M.; Mohanta, R.K. Effect of replacing a part of nitrogenous fertilizer by brown manuring in direct seeded rice: A field study. Oryza 2016, 53, 226–228. [Google Scholar]
- Tanwar, S.P.S.; Singh, A.K.; Joshi, N. Changing environment and sustained crop production: A challenge for agronomy. J. Arid. Legumes 2010, 7, 91–100. [Google Scholar]
- Maitra, S.; Zaman, A. Brown Manuring, an Effective Technique for Yield Sustainability and Weed Management of Cereal Crops: A Review. Int. J. Bioresour. Sci. 2017, 4, 1–5. [Google Scholar] [CrossRef] [Green Version]
- Maity, S.K.; Mukherjee, P.K. Effect of brown manuring on grain yield and nutrient use efficiency in dry direct seeded kharif rice. Indian J. Weed Sci. 2011, 43, 61–66. [Google Scholar]
- Sapkota, T.B.; Majumdar, K.; Jat, M.L.; Kumara, A.; Bishnoi, D.K.; Mcdonald, A.J.; Pampolino, M. Precision nutrient management in conservation agriculture-based wheat production of Northwest India: Profitability, nutrient use efficiency and environmental footprint. Field Crops Res. 2014, 155, 233–244. [Google Scholar] [CrossRef]
- Chauhan, B.S.; Abugho, S.B. Weed management in mechanized-sown, zero-till dry-seeded rice. Weed Technol. 2013, 27, 28–33. [Google Scholar] [CrossRef]
- Blackshaw, R.E.; Brandt, R.N.; Janzen, H.H.; Entz, T.; Grant, C.A.; Derksen, D.A. Differential response of weed species to added nitrogen. Weed Sci. 2003, 51, 532–539. [Google Scholar] [CrossRef]
- Nath, C.P.; Das, T.K.; Rana, K.S.; Pathak, H.; Bhattacharyya, R.; Sangeeta, P.; Singh, S.B.; Meena, M.C. Weed-management and wheat productivity in a conservation agriculture-based maize (Zea mays)-wheat (Triticum aestivum)-mungbean (Vigna radiata) system in north-western Indo-Gangetic plains of India. Indian J. Agron. 2015, 60, 554–563. [Google Scholar]
- Oyeogbe, A.I.; Das, T.K.; Bhatia, A.; Singh, S.B. Adaptive nitrogen and integrated weed management in conservation agriculture: Impacts on agronomic productivity, greenhouse gas emissions, and herbicide residues. Environ. Monit. Assess. 2017, 189, 198. [Google Scholar] [CrossRef]
- Bijay-Singh, S.R.; Kaur, J.; Jat, M.L.; Yadvinder-Singh, S.V.; Chandna, P.; Choudhary, O.P.; Gupta, R.K.; Thind, H.S. In-season estimation of yield and nitrogen management in irrigated wheat using a hand-held optical sensor in the Indo-Gangetic plains of South Asia. Agron. Sustain. Dev. 2011, 31, 589–603. [Google Scholar] [CrossRef] [Green Version]
- Raun, W.R.; Solie, J.B.; Johnson, G.V.; Stone, L.; Mullen, R.W.; Freeman, K.W.; Thomason, W.E.; Lukina, E.V. Improving nitrogen use efficiency in cereal grain production with optical sensing and variable rate application. Agron. J. 2002, 94, 815–820. [Google Scholar] [CrossRef] [Green Version]
- Bijarniya, D.; Parihar, C.M.; Jat, R.K.; Kalvania, K.; Kakraliya, S.K.; Jat, M.L. Portfolios of Climate Smart Agriculture Practices in Smallholder Rice-Wheat System of Eastern Indo-Gangetic Plains—Crop Productivity, Resource Use Efficiency and Environmental Foot Prints. Agronomy 2020, 10, 1561. [Google Scholar] [CrossRef]
- Snedecor, G.W.; Cochran, W.G. Statistical Methods, 8th ed.; Iowa State University Press: Ames Iowa, IA, USA, 1989. [Google Scholar]
- Raun, W.R.; Solie, J.B.; Stone, M.L.; Martin, K.L.; Freeman, K.W.; Mullen, R.W.; Zhang, H.; Schepers, J.S.; Johnson, G.V. Optical sensor-based algorithm for crop nitrogen fertilization. Commun. Soil Sci. Plant Anal. 2005, 36, 2759–2781. [Google Scholar] [CrossRef] [Green Version]
- Reay, D.S.; Davidson, E.A.; Smith, A. Global agriculture and nitrous oxide emissions. Nat. Clim. Chang. 2012, 6, 410–416. [Google Scholar] [CrossRef]
- Walsh, O.S.; Shafian, S.; Christiaens, R.J. Evaluation of sensor-based nitrogen rates and sources in wheat. Hindawi Int. J. Agron. 2018. [Google Scholar] [CrossRef] [Green Version]
- Fabbri, C.; Napoli, M.; Verdi, L.; Mancini, M.; Orlandini, S.; Marta, A.D. A Sustainability Assessment of the Optical crop sensor N Management Tool: A Lysimetric Experiment on Barley. Sustainability 2020, 12, 7303. [Google Scholar] [CrossRef]
- Singh, V.P.; Singh, S.P.; Kumar, A.; Banga, A.; Tripathi, N. Effect of monsoon & weed mgt on growth and yield of direct seeded rice. Indian J. Weed Sci. 2012, 44, 147–150. [Google Scholar]
- Bommayasamy, N.; Singh, L.B.; Pandey, V.K.; Nanda, B.K.; Nayak, H.; Kundu, A. Efficacy of rice cum dhaincha (Sesbania aculeata) intercropping on weed control, growth, yield and economics of rice. J. Pharmacogn. Phytochem. 2019, 8, 3257–3260. [Google Scholar]
- Singh, S.; Singh, G. Evaluation of different methods of establishment in wheat (Triticum aestivum) after different methods of rice establishment. Pantnagar. J. Res. 2007, 5, 36–40. [Google Scholar]
- Gupta, R.K.; Seth, A. A review of resource conserving technologies for sustainable management of the rice-wheat cropping system of IGPs. Crop Prot. 2007, 26, 436–447. [Google Scholar] [CrossRef]
- Singh, S.; Ladha, J.K.; Gupta, R.K.; Bhushan, L.; Rao, A.N.; Sivaprasad, B.; Singh, P.P. Evaluation of mulching, intercropping with Sesbania and herbicide use for weed management in dry-seeded rice. Crop Prot. 2007, 26, 518–524. [Google Scholar] [CrossRef]
- Medd, R.W.; Auld, B.A.; Kemp, D.R.; Murison, R.D. The influence of wheat density and spatial arrangement on annual ryegrass competition. Aust. J. Agric. Res. 1985, 36, 361–371. [Google Scholar] [CrossRef]
- Das, T.K.; Bhattacharyya, R.; Sharma, A.R.; Das, S.; Saad, A.A.; Pathak, H. Impacts of conservation agriculture on total soil organic carbon retention potential under irrigated agro-ecosystem of the western Indo-Gangetic Plains. Eur. J. Agron. 2013, 51, 34–42. [Google Scholar]
- Das, T.K.; Yaduraju, N.T. Optimization of metribuzin use for controlling isoproturon–resistant Phalaris minor Retz. in wheat. Pestic. Res. J. 2002, 14, 47–56. [Google Scholar]
- Joshi, E.; Kumar, D.; Lal, B.; Nepalia, V.; Gautam, P.; Vyas, A.K. Management of direct seeded rice for enhanced resource-use efficiency. Plant Knowl. J. 2013, 2, 119–134. [Google Scholar]
- Armengot, L.; Berner, A.; Blanco-Moreno, J.M.; Mäder, P.; Sans, F.X. Long-term feasibility of reduced tillage in organic farming. Agron. Sustain. Dev. 2015, 35. [Google Scholar] [CrossRef] [Green Version]
- Ali, A.M. Using Hand-Held Chlorophyll Meters and Canopy Reflectance Sensors for Fertilizer Nitrogen Management in Cereals in Small Farms in Developing Countries. Sensors 2020, 20, 11–27. [Google Scholar]
- Tuesca, D.; Puricelli, E.; Papa, J. A long-term study of weed flora shifts indifferent tillage systems. Weed Res. 2001, 41, 369–382. [Google Scholar] [CrossRef]
- Nandan, R.; Singh, V.; Singh, S.S.; Virender Kumar Hazra, K.K.; Nath, C.P.; Poonia, S.P.; Malik, R.K. Comparative assessment of the relative proportion of weed morphology, diversity, and growth under new generation tillage and crop establishment techniques in rice-based cropping systems. Crop Prot. 2018, 111, 23–32. [Google Scholar] [CrossRef]
- Taa, A.; Tanner, D.; Bennie, A.T. Effects of stubble management, tillage and cropping sequence on wheat production in the south-eastern highlands of Ethiopia. Soil Till. Res. 2004, 76, 69–82. [Google Scholar] [CrossRef]
- Mishra, J.S.; Singh, V.P. Effect of tillage and weed control on weed- dynamics, crop productivity, and energy-use efficiency in rice (Oryza sativa L.)-based cropping systems in Vertisols. Indian J. Agric. Sci. 2011, 81, 129–133. [Google Scholar]
- Nath, C.P.; Das, T.K.; Ranam, K.S.; Bhattacharyya, R.; Pathak, H.; Paul, S.; Meena, M.C.; Singh, S.B. Weed and nitrogen management effects on weed infestation and crop productivity of wheat–mung bean sequence in conventional and conservation tillage practices. Agric. Res. 2017, 6, 33–46. [Google Scholar] [CrossRef]
- Shekhawat, K.; Rathore, S.S.; Kandpal, B.K.; Premi, O.P.; Singh, D.; Chauhan, B.S. Crop establishment techniques affect productivity, sustainability and soil health under mustard-based cropping systems of Indian semi-arid regions. Soil Till. Res. 2016, 158, 137–146. [Google Scholar] [CrossRef]
- Kapila, S.; Rathore, S.S.; Bhagirath, S. Chauhan Review Weed Management in Dry Direct-Seeded Rice: A Review on Challenges and Opportunities for Sustainable Rice Production. Agronomy 2020, 10, 1264. [Google Scholar] [CrossRef]
- Gill, G.; Bhullar, M.S.; Yadav, A.; Yadav, D.B. Technology for successful production of direct seeded rice. In A Training Manual Based on the Outputs of ACIAR Funded Project CSE/2004/033; CCSHAU: Hisar, Haryana, 2013; p. 32. [Google Scholar]
- Mahajan, G.; Ramesh, M.S.; Chauhan, B.S. Genotypic Differences for Water-Use Efficiency and Weed Competitiveness in Dry Direct-Seeded Rice. Agron. J. 2015, 107, 1573–1584. [Google Scholar] [CrossRef]
- Eitel, J.U.H. Combined spectral index to improve ground-based estimates of nitrogen in dryland wheat. Agron. J. 2008, 100, 1694–1702. [Google Scholar] [CrossRef] [Green Version]
- Walsh, O.S.; Klatt, A.R.; Solie, J.B.; Godsey, C.B.; Raun, W.R. Use of soil moisture data for refined Optical crop sensor sensor based nitrogen recommendations in winter wheat (Triticum aestivum L.). Precis. Agric. 2013, 14, 343–356. [Google Scholar] [CrossRef] [Green Version]
- Kamboj, B.R.; Kumar, A.; Bishnoi, D.K.; Singla, K.; Kumar, V.; Jat, M.L.; Chaudhary, N.; Jat, H.S.; Gosain, D.K.; Khippal, A. Direct Seeded Rice Technology in Western Indo-Gangetic Plains of India: CSISA Experiences; CSISA, IRRI and CIMMYT: New Delhi, India, 2012; p. 16. [Google Scholar]
- Singh, S.; Chhokar, R.S.; Gopal, R.; Virender, K.; Singh, M. Integrated weed management –A key for success of direct seeded rice. In Proceedings of the 4th World Congress on Conservation Agriculture, New Delhi, India, 4–7 February 2009; p. 182. [Google Scholar]
- Mahajan, G.; Timsina, J. Effect of nitrogen rates and weed control methods on weeds abundance and yield of direct-seeded rice. Arch. Agron. Soil Sci. 2011, 57, 239–250. [Google Scholar] [CrossRef]
- Angiras, N.; Chopra, P.; Kumar, S. Weed seed bank and dynamics of weed flora as influenced by tillage and weed control methods in maize. Agric. Sci. Dig. 2010, 30, 6–10. [Google Scholar]
- Mahajan, G.; Chauhan, B.S. Herbicide options for weed control in dry-seeded aromatic rice in India. Weed Technol. 2013, 27, 682–689. [Google Scholar] [CrossRef]
- Jiang, M.; Liu, T.; Huang, N.; Shen, X.; Shen, M.; Dai, Q. Effect of long-term fertilisation on the weed community of a winter wheat field. Sci. Rep. 2018, 8, 4017. [Google Scholar] [CrossRef] [PubMed]
Main Plot/Weed Management | Maize (Rainy Season) | Wheat (Winter Season) | Treatment Short Forms | |
---|---|---|---|---|
Maize | Wheat | |||
W1 | Unweeded check | Weedy check | UWC | UWC |
W2 | Herbicide mixture as atrazine (0.75 kg a.i. ha−1) + pendimethalin (0.75 kg a.i. ha−1) as tank mix | Herbicide mixture of pendimethalin (1 kg a.i. ha−1) + carfentrazone (20 g/ha) as tank mix | Atra + pendi (PRE) | Pendi + carfentra (PRE) |
W3 | Brown manure (terminated at 25 DAS by 2,4-D) | Clodinafop-propargyl (60 g a.i. ha) + carfentrazone (20 g a.i. ha−1) as tank mix at 25 DAS | BM+ 2,4-D (POST) | Clodi + carfentra (POST) |
Sub-plot/N management (maize and wheat) | ||||
N1 | 50% basal + 2 splits at 30 DAS and 50 DAS (25% + 25%) in maize and wheat | FFP: Basal 50% + 2 splits (25% + 25%) | ||
N2 | 100% Basal | 100% Basal | ||
N3 | 75% Basal + rest as guided by optical crop sensor | Basal 75% + rest as sensor-guided | ||
N4 | 50% Basal + rest as guided by optical crop sensor | Basal 50% + rest as sensor guided |
Treatment | N Application, kg ha−1 | N Saving over FFP in Maize–Wheat System | Global Warming Potential (t CO2 eq. ha−1) | |||||||
---|---|---|---|---|---|---|---|---|---|---|
Maize | Wheat | Maize | Wheat | |||||||
2015–2016 | 2016–2017 | 2015–2016 | 2016–2017 | 2015–2016 | 2016–2017 | 2015–2016 | 2016–2017 | 2015–2016 | 2016–2017 | |
FFP | 90 + (45 + 45) * | 85 + (42.5 + 42.5) * | 75 + (37.5 + 37.5) | 76 + (38 + 38) | – | – | 1.99 | 1.91 | 1.68 | 1.65 |
100% basal | 178 | 170 | 150 | 148 | – | – | 1.99 | 1.91 | 1.68 | 1.65 |
75% Basal + rest as sensor-guided | 134 + (15 + 7) | 128 + (17 + 10) | 113 + (20 + 14) | 111 + (20 + 10) | 25 | 22 | 1.75 | 1.73 | 1.65 | 1.58 |
50% Basal + rest as sensor guided | 90 + (25 + 18 + 10) | 85 + (20 + 13 + 8) | 75 + (35 + 20 + 10) | 76 + (30 + 18 + 7) | 56 | 59 | 1.60 | 1.41 | 1.57 | 1.47 |
Treatment | 2015–2016 | 2016–2017 | ||||||
---|---|---|---|---|---|---|---|---|
35 DAS | 70 DAS | 35 DAS | 70 DAS | |||||
BLW | NLW | BLW | NLW | BLW | NLW | BLW | NLW | |
Weed management | ||||||||
UWC | 21.1 a* | 28.6 a | 40.3 a | 75.1 a | 18.2 a | 30.6 a | 34.2 a | 78.6 a |
Atra + pendi (PRE) | 15.3 b | 20.5 b | 31.2 a | 35.2 a | 7.6 b | 8.1 b | 18.2 b | 26.3 b |
BM+ 2,4-D (POST) | 13.4 b | 16.8 b | 22.2 b | 32.4 b | 4.3 c | 4.1 c | 14.7 c | 15.5 c |
Nitrogen management | ||||||||
FFP | 22.3 b | 28.1 b | 40.1 a | 62.5 b | 10.3 ab | 16.10 a | 22.7 b | 35.7 b |
100% Basal | 16.9 a | 24.5 a | 32.9 a | 50.2 a | 11.9 a | 14.89 ab | 31.3 a | 49.3 a |
75% Basal + rest as sensor guided | 17.4 b | 20.1 b | 29.2 b | 44.2 b | 9.3 ab | 11.87 ab | 20.0 b | 31.5 b |
50% Basal + rest as sensor guided | 9.6 c | 15.1 c | 22.3 c | 33.9 c | 8.4 b | 9.67 b | 15.0 c | 22.1 c |
Treatment | 2015–2016 | 2016–2017 | ||||||
---|---|---|---|---|---|---|---|---|
35 DAS | 70 DAS | 35 DAS | 70 DAS | |||||
BLW | NLW | BLW | NLW | BLW | NLW | BLW | NLW | |
Weed management | ||||||||
UWC | 11.1 a* | 20.5 a | 30.4 a | 56.2 a | 13.6 a | 21.9 a | 43.5 a | 90.3 a |
Pendi + carfentra (PRE) | 10.8 b | 15.1 b | 21.1 b | 26.5 b | 3.6 b | 5.9 b | 12.9 b | 18.6 b |
Clodi + carfentra (POST) | 6.4 c | 9.0 c | 17.2 c | 21.1 c | 2.1 c | 4.3 b | 9.7 b | 15.5 c |
Nitrogen management | ||||||||
FFP | 11.1 a | 17.1 b | 24.6 b | 36.8 b | 6.9 ab | 11.2 b | 23.5 b | 43.2 b |
100% Basal | 10.4 b | 19.1 c | 31.0 a | 45.3 c | 8.4 a | 14.2 a | 29.5 a | 54.5 a |
75% Basal + rest as sensor guided | 9.8 b | 14.1 b | 20.8 b | 35.5 b | 5.4 b | 10.3 bc | 21.2 b | 38.7 b |
50% Basal + rest as sensor guided | 6.8 c | 9.6 c | 14.8 c | 22.8 c | 4.8 b | 7.08 c | 13.6 c | 28.9 c |
Treatment | Maize | Wheat | ||||||
---|---|---|---|---|---|---|---|---|
2015 | 2016 | 2015 | 2016 | |||||
35 DAS | 70 DAS | 35 DAS | 70 DAS | 35 DAS | 70 DAS | 35 DAS | 70 DAS | |
Weed management | ||||||||
UWC | 40.7 a | 101.2 a | 47.5 a | 148.6 a | 31.5 a | 92.5 a | 41.2 c | 121.8 a |
Atra + pendi (PRE) | 19.5 b | 64.5 b | 17.5 b | 75.6 b | 22.2 b | 65.8 b | 15.5 b | 43.5 b |
BM+ 2,4-D (POST) | 17.6 c | 57.3 b | 15.3 b | 43.7 b | 15.3 a | 35.5 c | 8.4 b | 25.6 c |
Nitrogen management | ||||||||
FFP | 28.2 b | 74.7 b | 24.6 b | 88.6 b | 32.5 b | 75.2 b | 23.1 b | 66.7 b |
100% Basal | 34.1 a | 94.6 a | 31.2 a | 118.6 a | 34.5 c | 96.8 a | 28.2 a | 84.1 a |
75% Basal + rest as sensor guided | 25.5 b | 68.5 b | 21.5 b | 78.9 b | 26.6 b | 69.5 b | 20.2 bc | 59.9 b |
50% Basal + rest as sensor guided | 19.4 c | 50.2 c | 17.7 c | 67.2 c | 18.2 a | 51.2 c | 16.3 c | 42.5 c |
Sources of Variation | DF | p Value | |||||
---|---|---|---|---|---|---|---|
DM | LAI | Grain Yield (t/ha) | |||||
2015–2016 | 2016–2017 | 2015–2016 | 2016–2017 | 2015–2016 | 2016–2017 | ||
Replication | 2 | – | – | – | – | – | – |
Weed management (W) | 2 | 0.01865 * | 0.0108 * | 0.01865 * | 0.0108 * | 0.0006 ** | 0.0003 ** |
Error (a) | 4 | – | – | – | – | – | – |
Nitrogen management (N) | 3 | 0.0000 ** | 0.000 ** | 0.0000 ** | 0.000 ** | 0.0001 ** | 0.001 ** |
N × W | 6 | 0.8932 (ns) | 0.704 (ns) | 0.8932 (ns) | 0.704 (ns) | 0.00441 ** | 0.0070 ** |
Error (b) | 18 | – | – | – | – | – | – |
Sources of Variation | DF | p Value | |||||
---|---|---|---|---|---|---|---|
DM | LAI | Grain Yield (t/ha) | |||||
2015–2016 | 2016–2017 | 2015–2016 | 2016–2017 | 2015–2016 | 2016–2017 | ||
Replication | 2 | – | – | – | – | – | – |
Weed management (W) | 2 | 0.0170 * | 0.0035 ** | 0.0033 ** | 0.0005 ** | 0.0003 ** | 0.0296 * |
Error (a) | 4 | – | – | – | – | – | – |
Nitrogen management (N) | 3 | 0.0000 ** | 0.0000 ** | 0.0000 ** | 0.0000 ** | 0.0001 ** | 0.0001 ** |
N × W | 6 | 0.5291 (ns) | 0.9831 (ns) | 0.5728 (ns) | 0.9123 (ns) | 0.1125 (ns) | 0.0045 ** |
Error (b) | 18 | – | – | – | – | – | – |
Treatment | DM | LAI | Grain Yield | |||
---|---|---|---|---|---|---|
2015–2016 | 2016–2017 | 2015–2016 | 2016–2017 | 2015–2016 | 2016–2017 | |
Weed Management | ||||||
UWC | 0.52 b | 0.52 c | 4.46 b | 4.65 c | 4.37 c | 4.22 c |
Atra + pendi (PRE) | 0.56 a | 0.56 b | 4.95 a | 5.17 b | 5.33 b | 5.47 b |
BM+ 2,4-D (POST) | 0.59 a | 0.63 a | 5.28 a | 5.46 a | 5.92 a | 6.08 a |
Nitrogen management | ||||||
FFP | 0.52 c | 0.54 c | 4.52 c | 4.71 c | 5.14 b | 5.17 b |
100% Basal | 0.46 d | 0.46 d | 4.04 d | 4.22 d | 4.88 c | 4.83 c |
75% Basal + rest as sensor guided | 0.60 b | 0.60 b | 5.11 b | 5.29 b | 5.23 b | 5.35 b |
50% Basal + rest as sensor guided | 0.64 a | 0.67 a | 5.94 a | 6.15 a | 5.57 a | 5.69 a |
Treatment | DM | LAI | Grain Yield | |||
---|---|---|---|---|---|---|
2015–2016 | 2016–2016 | 2015–2016 | 2016–2016 | 2015–2016 | 2016–2016 | |
Weed Management | ||||||
UWC | 0.23 b | 0.25 b | 4.18 c | 4.98 b | 3.86 b | 4.38 c |
Pendi + carfentra (PRE) | 0.27 a | 0.29 a | 4.39 b | 5.34 b | 4.76 a | 5.16 b |
Clodi + carfentra (POST) | 0.29 a | 0.31 a | 5.22 a | 5.78 a | 4.91 a | 5.40 a |
Nitrogen management | ||||||
FFP | 0.24 c | 0.26 c | 4.18 c | 5.03 c | 4.33 b | 4.82 c |
100% Basal | 0.20 c | 0.22 c | 3.69 c | 4.46 d | 4.13 b | 4.54 d |
75% Basal + rest as sensor guided | 0.28 b | 0.30 b | 4.94 b | 5.68 b | 4.67 a | 5.14 b |
50% Basal + rest as sensor guided | 0.32 a | 0.34 a | 5.58 a | 6.29 a | 4.91 a | 5.43 a |
Treatment | Nitrogen Management | |||||||
---|---|---|---|---|---|---|---|---|
2015–2016 | 2016–2016 | |||||||
Weed Management | FFP | 100% Basal | 75% Basal + Rest as Sensor Guided | 50% Basal + Rest as Sensor Guided | FFP | 100% Basal | 75% Basal + Rest as Sensor Guided | 50% Basal + Rest as Sensor Guided |
UWC | 4.40 C*b** | 4.18 Bb | 4.40 Cb | 4.50 Ca | 4.25 Bb | 3.90 Bb | 4.36 Cb | 4.38 Ca |
Atra + pendi (PRE) | 5.27 Bb | 5.07 Ab | 5.30 Bb | 5.70 Ba | 5.42 Ab | 5.16 Ab | 5.50 Ba | 5.81 Ba |
BM+ 2,4-D (POST) | 5.77 Ab | 5.40 Ac | 6.00 Ab | 6.50 Aa | 5.83 Aa | 5.43 Ab | 6.18 Aa | 6.87 Aa |
Treatment | Nitrogen Management | |||||||
---|---|---|---|---|---|---|---|---|
2015–2016 | 2016–2016 | |||||||
Weed Management | FFP | 100% Basal | 75% Basal + Rest as Sensor Guided | 50% Basal + Rest as Sensor Guided | FFP | 100% Basal | 75% Basal + Rest as Sensor Guided | 50% Basal + Rest as Sensor Guided |
UWC | 3.72 Bb* | 3.47 Bb | 4.05 Aa | 4.19 Aa | 4.19 Bb** | 4.05 Ab | 4.52 Bb | 4.77 Bb |
Pendi + carfentra (PRE) | 4.64 Bb | 4.54 Bc | 4.79 Bb | 5.07 Aa | 5.03 Bb | 4.80 Bb | 5.29 Bb | 5.52 Aa |
Clodi + carfentra (POST) | 4.62 Bc | 4.40 Bd | 5.18 Ab | 5.47 Aa | 5.23 Bb | 4.78 Bb | 5.60 Aa | 6.00 Aa |
Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations. |
© 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
Share and Cite
Shekhawat, K.; Singh, V.K.; Rathore, S.S.; Raj, R.; Das, T.K. Achieving Sustainability in Food Systems: Addressing Changing Climate through Real Time Nitrogen and Weed Management in a Conservation Agriculture-Based Maize–Wheat System. Sustainability 2021, 13, 5010. https://doi.org/10.3390/su13095010
Shekhawat K, Singh VK, Rathore SS, Raj R, Das TK. Achieving Sustainability in Food Systems: Addressing Changing Climate through Real Time Nitrogen and Weed Management in a Conservation Agriculture-Based Maize–Wheat System. Sustainability. 2021; 13(9):5010. https://doi.org/10.3390/su13095010
Chicago/Turabian StyleShekhawat, Kapila, Vinod K. Singh, Sanjay Singh Rathore, Rishi Raj, and T. K. Das. 2021. "Achieving Sustainability in Food Systems: Addressing Changing Climate through Real Time Nitrogen and Weed Management in a Conservation Agriculture-Based Maize–Wheat System" Sustainability 13, no. 9: 5010. https://doi.org/10.3390/su13095010