Assessing Feasible Weed Management Options in Maize under Organic Farming System of Eastern Himalayas
DOI:
https://doi.org/10.53550/ijsc.v53.i3.210Keywords:
Benefit-cost ratio, Eastern himalayas, Intercropping, Mulching, Organic farming, Stale seedbed, Weed control efficiency, Weed index, Zea maysAbstract
Weed management under organic farming relies heavily on manual and mechanical methods, which are labour-intensive and costly, particularly in the high-rainfall hill ecosystems of North Eastern India. A field experiment was conducted for three consecutive years (2015–2017) on a long-term organic field (under organic management since 2005–06) at mid-altitude (950 m ASL) in Meghalaya to evaluate non-chemical weed management options for maize productivity, weed dynamics and soil health. Eight treatments were tested in a randomised block design, including hand weeding, mechanical weeding, soil solarization, mulching, stale seedbed preparation and maize–soybean intercropping. Among all treatments, two hand weedings at 20 and 45 days after sowing (DAS) recorded the lowest weed population (155.3/m²) and dry weight (75.3 g/m²) at 30 DAS. However, intercropping of maize with soybean (2:1) combined with one hand weeding at 45 DAS (T6) and stale seedbed + 25% reduced spacing + mulching with crop residues + one hand weeding at 45 DAS (T5) achieved significantly higher weed control efficiency at 60 DAS, the lowest weed indices (1.2 and 4.9%, respectively) and maize grain yields statistically at par with the weed-free check. T6 recorded the highest net returns (₹49,560/ha) and benefit–cost ratio (2.42), outperforming all other treatments, including the weed-free check, primarily due to lower weeding costs and the added benefit of biological nitrogen fixation by soybean. After three cropping cycles, T6 also recorded the highest soil organic carbon (22.3 g/kg), available nitrogen (272.5 kg/ha) and phosphorus (29.6 kg P₂O₅/ha), indicating concurrent improvement in soil health. Soil solarization performed poorly under the prevailing sub-32°C temperature regime of the region. Maize+soybean intercropping (2:1) with one hand weeding at 45 DAS is recommended as a practically viable, economically superior and soil health-enhancing weed management strategy for organic maize production in the North Eastern Hill Region of India.
References
Anderson JM and Ingram JSI. 1993. Tropical Soil Biology and Fertility, CAB, UK. DOI: https://doi.org/10.1097/00010694-199404000-00012
Das A, Kumar M, Ramkrushna G I, Patel D P, Layek J, Naropongla, Panwar A S and Ngachan S V. 2016. Weed management in maize under rainfed organic farming system. Indian Journal of Weed Science 48(2): 168-172. DOI: https://doi.org/10.5958/0974-8164.2016.00042.3
Das A, Layek J, Babu S, Ramkrushna GI, Baiswar P, Krishnappa R, Thoithoi DM, Kumar M and Prakash N. 2019. Package of practices for organic production of important crops in NEH region of India. ICAR Research Complex for NEH Region, Umiam, Meghalaya, p.228.
Essien B A, Essien J B, Nwite J C, Eke K A, Anaele U M and Ogbu J U. 2009. Effect of organic mulch materials on maize performance and weed growth in the derived Savanna of South Eastern Nigeria. Nigeria Agricultural Journal 40: 1-9.1 DOI: https://doi.org/10.4314/naj.v40i1-2.55581
Gomez K A and Gomez AA. 1984. Statistical Procedure for Agricultural nd Research. 2 Ed. International Rice Research Institute, John Wiley and Sons, New York, Singapore.
Gul B, Marwat K B, Hassan G, Khan A, Hasim S and Khan I A. 2009. Impact of tillage, plant population and mulches on biological yield of maize. Pakistan Journal of Botany 41(5): 2243-2249.
G.I., Ramkrushna., Das, Anup., Layek, Jayenta., Verma, B.C., Babu, Subhash., Mohapatra, K.P., and Sahane, A.A., 2022. Assessing maize based cropping systems for higher productivity and income under shifting cultivation in eastern Indian Himalayas. Indian J. Soil Cons 50(2) 101-106 DOI : 10.59797/ijsc. v 50.i2.164
Layek J, Shivakumar B G, Rana D S, Munda S, Lakshman K, Panwar A S, Das A and Ramkrushna G. I. 2014a. Performance of soybean (Glycine max) intercropped with different cereals under varying levels of nitrogen. Indian Journal of Agricultural Sciences 85(12): 1571–77. DOI: https://doi.org/10.56093/ijas.v85i12.54306
Layek J, Shivakumar B G, Rana D S, Munda S, Lakshman K, Das A and Ramkrushna G I. 2014b. Soybean–cereal intercropping systems as influenced by nitrogen nutrition. Agronomy Journal 106 (7): 1-14. DOI: https://doi.org/10.2134/agronj13.0521
Layek J, Ramkrushna G I, Suting D, Ngangom B, Krishnappa R, De U and Das A. 2016. Evaluation of Maize Cultivars for their Suitability under Organic Production System in North Eastern Hill Region of India. Indian Journal of Hill Farming 29(2):19-24
Khan S A, Hussain N, Khan I A, Khan M and Iqbal M. 1998. Study on weeds control in maize. Sarhad Journal of Agriculture 14(6): 581- 586.
Knudsen D, Peterson G A and Pratt P F. 1982. Lithium, sodium, and potassium. In: Methods of soil analysis, part 2: Chemical and DOI: https://doi.org/10.2134/agronmonogr9.2.2ed.c13
microbiological properties, (Eds. Page AL, Miller RH and Keeney DR), American Society of Agronomy Wisconsin, USA. Kumar B, Kumar R, Kalyani S and Haque M. 2013. Integrated weed management studies on weed flora and yield in Kharif maize. Trends in Biosciences 6(2): 161-164.th Leblanc M L and Cloutier D C. 1996. In: Poc. 10 Int. Synp. Biology of weeds, Dijon, France. Association National Pour la Protection desplantes 29-34.
Lehoczky E and Reisinger P. 2003. Study on the weed-crop competition for nutrients in maize. Communications in Agricultural and Applied Biological Sciences 68: 373-80.
Mahmood A, Ihsan M Z, Khaliq A, Hussain S, Cheema ZA, Naeem M, Daur I, Hussain H A and Alghabari F. 2015. Crop residues mulch as organic weed management strategy in maize. Soil, Air, Water 43 (9999): 1-8.
Meshram, D.T., Gorantiwar, S.D., Babu, K.D., and Pangul, C.S., 2022. Mulch bed system for improving water use efficiency of Pomegranate (Punica granatum L.) on a light texture soil in Deccan Plateau. Indian J. Soil Cons 50(2) 128-136 DOI : 10.59797/ijsc. v 50.i2.168 DOI: https://doi.org/10.59797/ijsc.v50.i2.168
Ngangom B, Das A, Lal R, Idapuganti R G, Layek J, Basavaraj S, Babu S, Yadav G S and Ghosh P K. 2020. Double mulching improves soil properties and productivity of maize based cropping system in eastern Indian Himalayas. International Soil and Water Conservation Research 8 (3):308-320. DOI: https://doi.org/10.1016/j.iswcr.2020.07.001
Olsen S R and Sommers L E. 1982. Phosphorus. In: Methods of Soil Analysis, Part 2: Chemical and Microbiological Properties, (Eds. Page AL, Miller RH and Keeney DR), Agronomy Monograph 9, ASAand SSSA, Madison, Wisconsin, USA. DOI: https://doi.org/10.2134/agronmonogr9.2.2ed.c24
Pierre H M J, Kinama J M, Olubayo F M, Wanderi S W, Muthomi J W and Nzuve F M. 2018. Effect of intercropping maize and soybean on soil fertility. International Journal of Agronomy and Agricultural Research 12(2): 87-100.
Ryan M R, Smith R G, Mirsky S B, Mortensen D A and Seidel R. 2010. Management filters and species traits: weed community assembly in long-term organic and conventional systems. Weed Science 58(3): 265-277. DOI: https://doi.org/10.1614/WS-D-09-00054.1
Saini J P, Rameshwar, Punam, Chadha S, Sharma S, Bhardwaj N and Rana N. 2013. Non-chemical methods of weed management in maize under organic production system. Indian Journal of Weed Science 45(3): 198-200.
Sani Y G, Jamshidi K, Yousefi A and Moghadam M R A. 2015. Control potency of corn and soybean intercropping on weeds at different irrigation condition. Advances in Plants & Agriculture Research 2(4): 155-162. DOI: https://doi.org/10.15406/apar.2015.02.00054
Senthilkumar D, Murali A P, Chinnusamy C, Bharathi C and Yalabela L. 2019. Stale seed bed techniques as successful weed management practice. Journal of Pharmacognosy and Phytochemistry SP2: 120- 123.
Sharma A R, Singh R, Dhyani S K and Dube R K. 2010. Moisture conservation and nitrogen recycling through legume mulching in rainfed maize (Zea mays) – wheat (Triticum aestivum) cropping system. Nutrient Cycling in Agroecosystems 87(2): 187-197. DOI: https://doi.org/10.1007/s10705-009-9327-y
Sharma P K and Acharya C L. 2000. Carry- over effect of residual soil moisture with mulching and conservation tillage practices for sowing of rainfed wheat (Triticum aestivum L) in North-West India. Soil and Tillage Research 57: 43-52. DOI: https://doi.org/10.1016/S0167-1987(00)00141-0
Subbiah B V and Asija G L. 1956. A rapid procedure for the estimation of available N in soils. Current Science 25: 259-260.
Syawal Y. 1998. Composition shift and other characteristics of weeds and yield of sweet corn on Andisols with N fertilization and weeding at critical period of the crop. Publikasi Berkala Penelitian Pascasarjana Universitas Padjadjaram 9(2): 18-33.
