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Data extracted in September 2022
Note to the reader: This general fiche summarises all the environmental and climate impacts of MULCHING found in a review of 41 synthesis papers[1]. These papers were selected from an initial number of 554 obtained through a systematic literature search strategy, according to the inclusion criteria reported in section 4.
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Table 1: Summary of effects flat planting with mulching. The numbers between parentheses indicate the number of synthesis papers with a quality score of at least 50%. Details on quality criteria can be found in the next section.
Impact | Metric | Intervention | Comparator | Positive | Negative | No effect | Uncertain |
Decrease Air pollutants emissions | NH3 emissions | Plastic film mulching | No mulching | 2 (2) | 0 | 0 | 0 |
Biodegradable mulching | No mulching | 1 (1) | 0 | 0 | 0 | ||
Increase Carbon sequestration | Soil organic carbon | Plastic film mulching | No mulching | 2 (2) | 2 (2) | 5 (5) | 0 |
Biodegradable mulching | No mulching | 0 | 0 | 1 (1) | 0 | ||
Decrease GHG emissions | CH4 emission | Plastic film mulching | No mulching | 4 (4) | 0 | 0 | 0 |
Straw mulching | No mulching | 0 | 1 (1) | 1 (1) | 0 | ||
Biodegradable mulching | No mulching | 1 (1) | 0 | 0 | 0 | ||
Decrease GHG emissions | CH4 uptake | Plastic film mulching | No mulching | 1 (1) | 3 (3) | 2 (2) | 0 |
Straw mulching | No mulching | 1 (1) | 0 | 1 (1) | 0 | ||
Decrease GHG emissions | GHG aggregated emission | Plastic film mulching | No mulching | 0 | 1 (1) | 1 (1) | 0 |
Straw mulching | No mulching | 0 | 0 | 1 (1) | 0 | ||
Gravel mulching | No mulching | 0 | 0 | 1 (1) | 0 | ||
Decrease GHG emissions | N2O emission | Plastic film mulching | No mulching | 0 | 2 (2) | 5 (5) | 0 |
Straw mulching | No mulching | 0 | 2 (2) | 3 (3) | 0 | ||
Gravel mulching | No mulching | 0 | 0 | 1 (1) | 0 | ||
Biodegradable mulching | No mulching | 0 | 0 | 1 (1) | 0 | ||
Decrease Nitrogen footprint |
| Plastic film mulching | No mulching | 1 (1) | 0 | 1 (1) | 0 |
Decrease Nutrient leaching and run-off | N leaching and run-off | Plastic film mulching | No mulching | 1 (1) | 0 | 0 | 0 |
P leaching and run-off | Plastic film mulching | No mulching | 1 (1) | 0 | 0 | 0 | |
Decrease Pests and diseases |
| Biodegradable mulching | Plastic film mulching | 1 (1) | 1 (1) | 1 (1) | 0 |
Increase Plant nutrient uptake |
| Straw mulching | No mulching | 3 (3) | 0 | 0 | 0 |
Plastic film mulching | No mulching | 2 (2) | 0 | 0 | 0 | ||
Plastic film and straw mulching | No mulching | 1 (1) | 0 | 0 | 0 | ||
Increase Plastic residues |
| Plastic film mulching | No mulching | 0 | 1 (1) | 0 | 0 |
Increase Soil biological quality |
| Plastic film mulching | No mulching | 2 (2) | 1 (1) | 1 (1) | 0 |
Decrease Soil erosion |
| Plastic film mulching | No mulching | 3 (3) | 0 | 0 | 0 |
Increase Soil nutrients |
| Plastic film mulching | No mulching | 0 | 0 | 2 (2) | 0 |
Increase Soil physico-chemical quality |
| Plastic film mulching | No mulching | 0 | 0 | 1 (0) | 0 |
Increase Soil water retention |
| Plastic film mulching | No mulching | 6 (6) | 0 | 0 | 0 |
Straw mulching | No mulching | 1 (1) | 0 | 0 | 0 | ||
Decrease Water footprint |
| Plastic film mulching | No mulching | 1 (1) | 1 (1) | 0 | 0 |
Decrease Water use |
| Plastic film mulching | No mulching | 15 (15) | 3 (3) | 8 (8) | 0 |
Straw mulching | No mulching | 6 (6) | 0 | 3 (3) | 0 | ||
Biodegradable mulching | No mulching | 1 (1) | 0 | 0 | 0 | ||
Plastic film mulching | 0 | 1 (1) | 0 | 0 | |||
Mulching (several mulching materials aggregated) | No mulching | 1 (1) | 0 | 1 (1) | 0 | ||
Increase Crop yield |
| Plastic film mulching | No mulching | 26 (26) | 1 (1) | 4 (3) | 0 |
Straw mulching | No mulching | 10 (10) | 0 | 1 (1) | 0 | ||
Gravel mulching | No mulching | 1 (1) | 0 | 0 | 0 | ||
Plastic film and straw mulching | No mulching | 2 (2) | 0 | 0 | 0 | ||
Biodegradable mulching | No mulching | 2 (2) | 0 | 0 | 0 | ||
Plastic film mulching | 0 | 1 (1) | 1 (1) | 0 |
Table 2: Summary of effects ridge and furrow planting with mulching. The numbers between parentheses indicate the number of synthesis papers with a quality score of at least 50%. Details on quality criteria can be found in the next section.
Impact | Metric | Intervention | Comparator | Positive | Negative | No effect | Uncertain |
Decrease GHG emissions | CH4 uptake | Ridge and furrow with mulching | Flat planting with no mulching | 0 | 1 (1) | 1 (1) | 0 |
N2O emission | Ridge and furrow with mulching | Flat planting with no mulching | 0 | 1 (1) | 1 (1) | 0 | |
Decrease Soil water retention |
| Ridge and furrow with mulching | Flat planting with no mulching | 1 (1) | 0 | 0 | 0 |
Increase Water use |
| Ridge and furrow with mulching | Flat planting with no mulching | 4 (4) | 2 (2) | 3 (3) | 0 |
Increase Crop yield |
| Ridge and furrow with mulching | Flat planting with no mulching | 6 (6) | 0 | 1 (1) | 0 |
3. DESCRIPTION OF THE IMPACTS OF THE FARMING PRACTICE ON ENVIRONMENT AND CLIMATE
Only the factors explicitly studied in the reviewed synthesis papers with a significant effect are reported below. Details regarding the factors can be found in the summaries of the meta-analyses.
Impacts | Factors |
Air pollutants emissions | Cropping system type (Ref17), Mineral N fertiliser amount applied (Ref10) and Mineral N fertiliser application rate (Ref17). |
Carbon sequestration | Climate (Ref23), Crop type (Ref19, Ref23, Ref38), Mineral N fertiliser amount applied (Ref23), Plant density (Ref23), Soil texture (Ref23) and Type of mulching (Ref19). |
GHG emissions | Climate (Ref18, Ref18, Ref33), Crop type (Ref2, Ref19, Ref33), Duration of treatment (Ref33), Film ratio (Ref8), Film thickness (Ref19), irrigation (Ref19), Irrigation method (Ref2), Mineral N fertiliser amount applied (Ref33), Mulching area (Ref2), Mulching material (Ref2, Ref8), Mulching patterns (Ref2), N application rate (Ref18), Planting method (Ref8), Soil organic carbon (Ref33), Soil texture (Ref8, Ref33), Straw C/N ratio (Ref33) and Type of mulching (Ref19) |
Nitrogen footprint | Mean annual precipitation (Ref26) |
Nutrient leaching and run-off | Cropping system type (Ref17), Mineral N fertiliser amount applied (Ref10) and Mineral N fertiliser application rate (Ref17). |
Pests and diseases | Mineral N fertiliser amount applied (Ref35, Ref42), Tillage (Ref35) and Water consumption (Ref42). |
Plant nutrient uptake | Mineral N fertiliser amount applied (Ref35, Ref42), Tillage (Ref35) and Water consumption (Ref42). |
Plastic residues | Mean annual precipitation (Ref26) |
Soil biological quality | Climate (Ref23), Crop type (Ref23), Fertliser type (Ref4), Mineral N fertiliser amount applied (Ref23), Mulching material (Ref4), Plant density (Ref23), Soil pH (Ref4) and Soil texture (Ref23). |
Soil erosion | Cropping system type (Ref17), Mineral N fertiliser amount applied (Ref10) and Mineral N fertiliser application rate (Ref17). |
Soil nutrients | Climate (Ref23), Crop type (Ref23), Fertliser type (Ref4), Mineral N fertiliser amount applied (Ref23), Mulching material (Ref4), Plant density (Ref23), Soil pH (Ref4) and Soil texture (Ref23). |
Soil physico-chemical quality | Mean annual precipitation (Ref26) |
Soil water retention | Film type (Ref27), Mean annual precipitation (Ref1), Mean annual temperature (Ref1), Mulching cycle (Ref27), Plastic film residue (Ref27), Soil depth (Ref16, Ref38), Soil texture (Ref1) and Tillage intensity (Ref1). |
Water footprint | Crop type (Ref7) and Mineral N fertiliser amount applied (Ref7) |
Water use | Climate (Ref9), Crop type (Ref9, Ref16, Ref22, Ref31, Ref38), Geographical area (Ref9), Mean annual precipitation (Ref3, Ref6, Ref16), Mean annual temperature (Ref1, Ref3, Ref37), Mineral N fertiliser amount applied (Ref16), Mulching material (Ref6), Planting method (Ref6), Plastic film residue (Ref31), Region/geographic area (Ref37), Soil depth (Ref16), Soil texture (Ref1, Ref9), Soil type (Ref9), Tillage intensity (Ref1) and Water consumption (Ref9, Ref37) |
Crop yield | Climate (Ref1, Ref9, Ref11, Ref18, Ref18, Ref23), Crop type (Ref2, Ref8, Ref9, Ref19, Ref22, Ref23, Ref31, Ref38), Geographical area (Ref9), Irrigation method (Ref2), Mean annual precipitation (Ref3, Ref16, Ref26, Ref38, Ref40), Mean annual temperature (Ref3, Ref37, Ref40, Ref42), Mineral fertiliser addition (Ref37), Mineral N fertiliser amount applied (Ref16, Ref35, Ref42), Mineral N fertiliser application rate (Ref38), Mulching material (Ref2, Ref6, Ref8, Ref37), N application rate (Ref18), Plant density (Ref23), Planting method (Ref8), Plastic film residue (Ref27, Ref31), Region/geographic area (Ref37), Soil organic matter (Ref42), Soil texture (Ref1, Ref8, Ref13, Ref23), Soil type (Ref9, Ref40), Tillage (Ref35), Tillage intensity (Ref1), Type of country (Ref23), Type of mulching (Ref19) and Water consumption (Ref9, Ref37, Ref42) |
4. SYSTEMATIC REVIEW SEARCH STRATEGY
Parameter | Details |
Keywords | WOS: ("crop residue*" OR "residue* from crop*" OR "field residue*" OR "plant residue*" OR "agricult* residue*" OR "legume residue*" OR "pruning residue*" OR "plant litter" OR "straw" OR "stubble*" OR "residue* retention" OR "residue* return" OR "residue* burning" OR "residue* incorporation" OR "mulch*" ) (All Fields) AND ( "meta-analy*" OR "systematic* review*" OR "evidence map" OR "global synthesis" OR "evidence synthesis" OR "research synthesis") (All Fields) |
Time reference | No time restriction. |
Databases | Web of Science and Scopus: run on 27 September 2022 |
Selection criteria | The main criteria that led to the exclusion of a synthesis paper are: |
5. LIST OF REFERENCES
Ref Num | Author(s) | Year | Title | Journal | DOI |
Ref1 | Adil M., Zhang S., Wang J., Shah A.N., Tanveer M., Fiaz S. | 2022 | Effects of Fallow Management Practices on Soil Water, Crop Yield and Water Use Efficiency in Winter Wheat Monoculture System: A Meta-Analysis | FRONTIERS IN PLANT SCIENCE, 13:825309. | 10.3389/fpls.2022.825309 |
Ref2 | Guo, C, Liu, XF | 2022 | Effect of soil mulching on agricultural greenhouse gas emissions in China: A meta-analysis | PLOS ONE, 17(1), e0262120. | 10.1371/journal.pone.0262120 |
Ref3 | Han X., Feng Y., Zhao J., Ren A., Lin W., Sun M., Gao Z. | 2022 | Hydrothermal conditions impact yield, yield gap and water use efficiency of dryland wheat under different mulching practice in the Loess Plateau | AGRICULTURAL WATER MANAGEMENT, 264, 107422. | 10.1016/j.agwat.2021.107422 |
Ref4 | Li Y., Xie H., Ren Z., Ding Y., Long M., Zhang G., Qin X., Siddique K.H.M., Liao Y. | 2022 | Response of soil microbial community parameters to plastic film mulch: A meta-analysis | GEODERMA, 418, 115851. | 10.1016/j.geoderma.2022.115851 |
Ref5 | Mak-Mensah E., Yeboah F.K., Obour P.B., Usman S., Essel E., Bakpa E.P., Zhang D., Zhou X., Wang X., Zhao X., Zhao W., Wang Q., Adingo S., Ahiakpa J.K. | 2022 | Integration of ridge and furrow rainwater harvesting systems and soil amendments improve crop yield under semi-arid conditions | PADDY AND WATER ENVIRONMENT, 20(3), 287-302. | 10.1007/s10333-022-00900-y |
Ref6 | Minhua Y., Yanlin M., Yanxia K., Qiong J., Guangping Q., Jinghai W., Changkun Y., Jianxiong Y. | 2022 | Optimized farmland mulching improves alfalfa yield and water use efficiency based on meta-analysis and regression analysis | AGRICULTURAL WATER MANAGEMENT, 267, 107617. | 10.1016/j.agwat.2022.107617 |
Ref7 | Wang L., Li L., Xie J., Luo Z., Sumera A., Zechariah E., Fudjoe S.K., Palta J.A., Chen Y. | 2022 | Does plastic mulching reduce water footprint in field crops in China? A meta-analysis | AGRICULTURAL WATER MANAGEMENT, 260, 107293. | 10.1016/j.agwat.2021.107293 |
Ref8 | Wei H., Zhang F., Zhang K., Qin R., Zhang W., Sun G., Huang J. | 2022 | Effects of soil mulching on staple crop yield and greenhouse gas emissions in China: A meta-analysis | FIELD CROPS RESEARCH, 284, 108566. | 10.1016/j.fcr.2022.108566 |
Ref9 | Zhang W., Dong A., Liu F., Niu W., Siddique K.H.M. | 2022 | Effect of film mulching on crop yield and water use efficiency in drip irrigation systems: A meta-analysis | SOIL AND TILLAGE RESEARCH, 221, 105392. | 10.1016/j.still.2022.105392 |
Ref10 | Abdo A.I., Shi D., Li J., Yang T., Wang X., Li H., Abdel-Hamed E.M.W., Merwad A.-R.M.A., Wang L. | 2021 | Ammonia emission from staple crops in China as response to mitigation strategies and agronomic conditions: Meta-analytic study | JOURNAL OF CLEANER PRODUCTION, 279, 123835. | 10.1016/j.jclepro.2020.123835 |
Ref11 | He G., Wang Z., Hui X., Huang T., Luo L. | 2021 | Black film mulching can replace transparent film mulching in crop production | FIELD CROPS RESEARCH, 261, 108026. | 10.1016/j.fcr.2020.108026 |
Ref12 | Lei T., Luo C., Zhang R., Hu C., Xu J., Sadras V., Yang X., Zhang S. | 2021 | Partial-film mulch returns the same gains in yield and water use efficiency as full-film mulch with reduced cost and lower pollution: a meta-analysis | JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE, 101(14), 5956-5962. | 10.1002/jsfa.11248 |
Ref13 | Li Y., Yang J., Shi Z., Pan W., Liao Y., Li T., Qin X. | 2021 | Response of root traits to plastic film mulch and its effects on yield | SOIL AND TILLAGE RESEARCH, 209, 104930. | 10.1016/j.still.2020.104930 |
Ref14 | Liu R., Thomas B.W., Shi X., Zhang X., Wang Z., Zhang Y. | 2021 | Effects of ground cover management on improving water and soil conservation in tree crop systems: A meta-analysis | CATENA, 199, 105085. | 10.1016/j.catena.2020.105085 |
Ref15 | Qin X., Huang T., Lu C., Dang P., Zhang M., Guan X.-K., Wen P.-F., Wang T.-C., Chen Y., Siddique K.H.M. | 2021 | Benefits and limitations of straw mulching and incorporation on maize yield, water use efficiency, and nitrogen use efficiency | AGRICULTURAL WATER MANAGEMENT, 256, 107128. | 10.1016/j.agwat.2021.107128 |
Ref16 | Ren A.-T., Zhou R., Mo F., Liu S.-T., Li J.-Y., Chen Y., Zhao L., Xiong Y.-C. | 2021 | Soil water balance dynamics under plastic mulching in dryland rainfed agroecosystem across the Loess Plateau | AGRICULTURE, ECOSYSTEMS AND ENVIRONMENT, 312, 107354. | 10.1016/j.agee.2021.107354 |
Ref17 | Sha Z., Liu H., Wang J., Ma X., Liu X., TomMisselbrook | 2021 | Improved soil-crop system management aids in NH3 emission mitigation in China | ENVIRONMENTAL POLLUTION, 289, 117844. | 10.1016/j.envpol.2021.117844 |
Ref18 | Wang H., Zheng J., Fan J., Zhang F., Huang C. | 2021 | Grain yield and greenhouse gas emissions from maize and wheat fields under plastic film and straw mulching: A meta-analysis | FIELD CROPS RESEARCH, 270, 108210. | 10.1016/j.fcr.2021.108210 |
Ref19 | Yu Y., Zhang Y., Xiao M., Zhao C., Yao H. | 2021 | A meta-analysis of film mulching cultivation effects on soil organic carbon and soil greenhouse gas fluxes | CATENA, 206, 105483. | 10.1016/j.catena.2021.105483 |
Ref20 | Zhang S., Wang H., Sun X., Fan J., Zhang F., Zheng J., Li Y. | 2021 | Effects of farming practices on yield and crop water productivity of wheat, maize and potato in China: A meta-analysis | AGRICULTURAL WATER MANAGEMENT, 243, 106444. | 10.1016/j.agwat.2020.106444 |
Ref21 | Chen, J, Xiao, HB, Li, ZW, Liu, C, Ning, K, Tang, CJ | 2020 | How effective are soil and water conservation measures (SWCMs) in reducing soil and water losses in the red soil hilly region of China? A meta -analysis of field plot data | SCIENCE OF THE TOTAL ENVIRONMENT, 735, 139517. | 10.1016/j.scitotenv.2020.139517 |
Ref22 | Gu X., Cai H., Fang H., Li Y., Chen P., Li Y. | 2020 | Effects of degradable film mulching on crop yield and water use efficiency in China: A meta-analysis | SOIL AND TILLAGE RESEARCH, 202, 104676. | 10.1016/j.still.2020.104676 |
Ref23 | Mo F., Yu K.-L., Crowther T.W., Wang J.-Y., Zhao H., Xiong Y.-C., Liao Y.-C. | 2020 | How plastic mulching affects net primary productivity, soil C fluxes and organic carbon balance in dry agroecosystems in China | JOURNAL OF CLEANER PRODUCTION, 263, 121470. | 10.1016/j.jclepro.2020.121470 |
Ref24 | Tofanelli M.B.D., Wortman S.E. | 2020 | Benchmarking the agronomic performance of biodegradable mulches against polyethylene mulch film: A meta-analysis | AGRONOMY, 10, 1618. | 10.3390/agronomy10101618 |
Ref25 | Wang J., Pan Z., Pan F., He D., Pan Y., Han G., Huang N., Zhang Z., Yin W., Zhang J., Peng R., Wang Z. | 2020 | The regional water-conserving and yield-increasing characteristics and suitability of soil tillage practices in Northern China | AGRICULTURAL WATER MANAGEMENT, 228, 105883. | 10.1016/j.agwat.2019.105883 |
Ref26 | Wang L., Coulter J.A., Li L., Luo Z., Chen Y., Deng X., Xie J. | 2020 | Plastic mulching reduces nitrogen footprint of food crops in China: A meta-analysis | SCIENCE OF TOTAL ENVIRONMENT, 748, 141479. | 10.1016/j.scitotenv.2020.141479 |
Ref27 | Zhang D., Ng E.L., Hu W., Wang H., Galaviz P., Yang H., Sun W., Li C., Ma X., Fu B., Zhao P., Zhang F., Jin S., Zhou M., Du L., Peng C., Zhang X., Xu Z., Xi B., Liu X., Sun S., Cheng Z., Jiang L., Wang Y., Gong L., Kou C., Li Y., Ma Y., Huang D., Zhu J., Yao J., Lin C., Qin S., Zhou L., He B., Chen D., Li H., Zhai L., Lei Q., Wu S., Zhang Y., Pan J., Gu B., Liu H. | 2020 | Plastic pollution in croplands threatens long-term food security | GLOBAL CHANGE BIOLOGY, 26(6), 3356-3367. | 10.1111/gcb.15043 |
Ref28 | Zheng H., Shao R., Xue Y., Ying H., Yin Y., Cui Z., Yang Q. | 2020 | Water productivity of irrigated maize production systems in Northern China: A meta-analysis | AGRICULTURAL WATER MANAGEMENT, 234, 106119. | 10.1016/j.agwat.2020.106119 |
Ref29 | Cuevas, J., Daliakopoulos, I.N., del Moral, F., Hueso, J.J., Tsanis, I.K. | 2019 | A Review of Soil-Improving Cropping Systems for Soil Salinization | AGRONOMY, 9(6), 295. | 10.3390/agronomy9060295 |
Ref30 | Gao H., Yan C., Liu Q., Ding W., Chen B., Li Z. | 2019 | Effects of plastic mulching and plastic residue on agricultural production: A meta-analysis | SCIENCE OF TOTAL ENVIRONMENT, 651, 484-492. | 10.1016/j.scitotenv.2018.09.105 |
Ref31 | Gu J., Nie H., Guo H., Xu H., Gunnathorn T. | 2019 | Nitrous oxide emissions from fruit orchards: A review | ATMOSPHERIC ENVIRONMENT, 201, 166-172. | 10.1016/j.atmosenv.2018.12.046 |
Ref32 | Hu N., Chen Q., Zhu L. | 2019 | The responses of soil N2O emissions to residue returning systems: A meta-analysis | SUSTAINABILITY, 11(3), 748. | 10.3390/su11030748 |
Ref33 | Lee H., Lautenbach S., Nieto A.P.G., Bondeau A., Cramer W., Geijzendorffer I.R. | 2019 | The impact of conservation farming practices on Mediterranean agro-ecosystem services provisioning—a meta-analysis | REGIONAL ENVIRONMENTAL CHANGE, 19(8), 2187-2202. | 10.1007/s10113-018-1447-y |
Ref34 | Wang L., Coulter J.A., Palta J.A., Xie J., Luo Z., Li L., Carberry P., Li Q., Deng X. | 2019 | Mulching-induced changes in tuber yield and nitrogen use efficiency in potato in China: A meta-analysis | AGRONOMY, 9(12), 793. | 10.3390/agronomy9120793 |
Ref35 | He G., Wang Z., Li S., Malhi S.S. | 2018 | Plastic mulch: Tradeoffs between productivity and greenhouse gas emissions | JOURNAL OF CLEANER PRODUCTION, 172, 1311-1318. | 10.1016/j.jclepro.2017.10.269 |
Ref36 | Li Q., Li H., Zhang L., Zhang S., Chen Y. | 2018 | Mulching improves yield and water-use efficiency of potato cropping in China: A meta-analysis | FIELD CROPS RESEARCH, 221, 50-60. | 10.1016/j.fcr.2018.02.017 |
Ref37 | Ma D., Chen L., Qu H., Wang Y., Misselbrook T., Jiang R. | 2018 | Impacts of plastic film mulching on crop yields, soil water, nitrate, and organic carbon in Northwestern China: A meta-analysis | AGRICULTURAL WATER MANAGEMENT, 202, 166-173. | 10.1016/j.agwat.2018.02.001 |
Ref38 | Xiong, M., Sun, R., Chen, L. | 2018 | Effects of soil conservation techniques on water erosion control: A global analysis | SCIENCE OF THE TOTAL ENVIRONMENT, 645, 753-760. | 10.1016/j.scitotenv.2018.07.124 |
Ref39 | Yu Y.-Y., Turner N.C., Gong Y.-H., Li F.-M., Fang C., Ge L.-J., Ye J.-S. | 2018 | Benefits and limitations to straw- and plastic-film mulch on maize yield and water use efficiency: A meta-analysis across hydrothermal gradients | EUROPEAN JOURNAL OF AGRONOMY, 99, 138-147. | 10.1016/j.eja.2018.07.005 |
Ref40 | Daryanto S., Wang L., Jacinthe P.-A. | 2017 | Can ridge-furrow plastic mulching replace irrigation in dryland wheat and maize cropping systems? | AGRICULTURAL WATER MANAGEMENT, 190, 1-5. | 10.1016/j.agwat.2017.05.005 |
Ref41 | Qin W., Hu C., Oenema O. | 2015 | Soil mulching significantly enhances yields and water and nitrogen use efficiencies of maize and wheat: A meta-analysis | SCIENTIFIC REPORTS, 5, 16210. | 10.1038/srep16210 |
[1] Synthesis research papers include either meta-analysis or systematic reviews with quantitative results.
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