Field Crops Research

Papers
(The TQCC of Field Crops Research is 17. The table below lists those papers that are above that threshold based on CrossRef citation counts [max. 250 papers]. The publications cover those that have been published in the past four years, i.e., from 2022-01-01 to 2026-01-01.)
ArticleCitations
Sheep grazing increases the forage yield and reduces the yield-scaled soil CO2 emissions of sown pastures in an inland arid region198
Editorial Board172
Editorial Board100
Towards higher agrobiodiversity – Evaluating the effects of undersowing different flowering species on soybean productivity99
Management practices regulate the response of canopy and ecosystem water use efficiency in cropland ecosystems87
Integrated mulching and nitrogen management strategies influence carbon footprint and sustainability of wheat production on the Loess Plateau of China83
Long-term diversified cropping promotes wheat yield and sustainability across contrasting climates: Evidence from China and Switzerland83
Crop nitrogen status and yield formation: A cross-species comparison for maize, rice, and wheat field crops80
Estimating the maize above-ground biomass by constructing the tridimensional concept model based on UAV-based digital and multi-spectral images78
Effective Striga control and yield intensification on maize farms in western Kenya with N fertilizer and herbicide-resistant variety74
Optimizing nutrient management for various potato varieties based on source–sink relationships71
Identification of agronomic and physiological traits in high rolling-resistance varieties for mechanized ratoon rice production70
Sustainability assessment of nitrogen nutrition index based topdressing nitrogen application67
Optimizing tillage regimes in rice-rapeseed rotation system to enhance crop yield and environmental sustainability67
Relevance of grain number and grain weight on barley yield responses to environmental and genetic factors66
Contrasted reaction norms of wheat yield in pure vs mixed stands explained by tillering plasticities and shade avoidance66
Selection of suitable type and application rate of biochar for alfalfa (Medicago sativa L.) productivity in ridge-furrow rainwater-harvesting in semiarid regions of China65
Optimizing bioenergy sorghum productivity and nutrient removal in Illinois: Impact of nitrogen fertilization under diverse marginal conditions65
Root system architecture in a barley RIL population: Agronomic effects of seedling and adult root traits63
Regulation of photoassimilate transportation and nitrogen uptake to decrease greenhouse gas emissions in ratooning rice with higher economic return by optimized nitrogen supplies61
Retrieving canopy nitrogen concentration and aboveground biomass with deep learning for ryegrass and barley: Comparing models and determining waveband contribution60
Trends in crop yield estimation via data assimilation based on multi-interdisciplinary analysis57
Ecosystem level carbon and moisture fluxes from a high biomass fibre producing jute crop (Corchorus olitorius L): An eddy covariance-based analysis56
Variations in water availability and N cycling across different seasons in cover crop systems56
Responses of soil water supply during the wheat growing season to agricultural management practice in Northern China: A meta-analysis55
Boll/leaf ratio improves the source–sink relationship and lint yield during the boll setting stage of cotton55
Regulation of 2-acetyl-1-pyrroline (2-AP) biosynthesis and grain quality in fragrant rice under salt stress55
Evaluating nitrogen fertilization strategies to optimize yield and grain nitrogen content in top winter wheat varieties across Switzerland54
Biochar effects on crop yield variability53
Consistency, variability, and predictability of on-farm nutrient responses in four grain legumes across East and West Africa52
Long-term no tillage straw mulching increased soil water and nitrogen storage in dryland wheat on the Loess Plateau, but may increase dissolved organic nitrogen leaching51
One–third substitution of nitrogen with cow manure or biochar greatly reduced N2O emission and carbon footprint in saline–alkali soils51
Pi-efficient wheat cultivars screened by using both functional marker CAPS-799 and field experiment51
Effects of cultural practices on weed community and seedbank dynamics in a potato rotation51
Key factors influencing wheat grain zinc and manganese concentration in areas with different soil available phosphorus50
Quantifying pre- and post-anthesis heat waves on grain number and grain weight of contrasting wheat cultivars50
Does straw return increase crop yield in the wheat-maize cropping system in China? A meta-analysis50
Uncovering the potentials of long-term straw return and nitrogen supply on subtropical maize (Zea mays L.) photosynthesis and grain yield50
Adapting the CROPGRO Perennial Forage model to predict growth and development of Pensacola bahiagrass50
Effects of sunflower residue management options on productivity and profitability of succeeding rice under different crop establishment methods49
Tillage practices and mulching affect system productivity, profitability and energy use in Sesbania alley based food - fodder systems under rainfed agro-ecosystems of semi-arid tropics49
Nitrogen application at a lower rate reduce net field global warming potential and greenhouse gas intensity in winter wheat grown in semi-arid region of the Loess Plateau49
The allometric relationships between biomass and nitrogen of vegetative organs affect crop N status in maize at silking stage49
Evaluation and application of the CROPGRO – Cowpea model for simulating appropriate sowing window and planting density of cowpea varieties across contrasting environments49
How will future climates in the Pakistani Punjab rice-wheat system affect the optimal agronomic settings, and can adaptation offset losses?49
Physiological responses to subsoil manuring in crop species across high and medium rainfall regions48
Agronomic manipulation in main season and ratoon rice influences growth, productivity, and regeneration ability in tropical lowlands47
Overyielding of maize cultivar mixtures is associated with interaction-driven depth partitioning of roots47
Simulating plastic mulching effects on the soil water balance and maize yields using the modified RZ-SHAW model47
Light interception, agronomic performance,and nutritive quality of annual forage legumes as affected by shade46
Comparison of phosphorus application on crop yield and soil phosphorus pool in rapeseed/wheat-rice rotations: An 8-year field experiment46
Positive legacy effects of grass-legume mixture leys on phosphorus uptake and yield of maize weaken over the growing season46
Integrating UAV and satellite LAI data into a modified DSSAT-rapeseed model to improve yield predictions46
Screening suitable legumes for living mulches to support nitrogen dynamics and weed control in a durum wheat-forage sorghum crop sequence46
Manure application enhanced cotton yield by facilitating microbially mediated P bioavailability45
Annual cumulative ambient precipitation determines the effects of climate change on biomass and yield of three important field crops45
A moderate wetting and drying regime produces more and healthier rice food with less environmental risk45
Residual effects of repeated catch crops on spring barley yield and nitrate leaching45
Conservation tillage effects on European crop yields: A meta-analysis44
Predicting intercrop competition, facilitation, and productivity from simple functional traits44
Soybean-maize intercropping combined with water management enhances leaf traits to obtain yield benefits in semi-arid regions44
Optimizing nitrogen fertilizer inputs and plant populations for greener wheat production with high yields and high efficiency in dryland areas44
Effects of selenium application on wheat yield and grain selenium content: A global meta-analysis44
Trade-off between grain yield and bioactive substance content of colored rice under coupled water and nitrogen conditions43
Analysis of overwintering indexes of winter wheat in alpine regions and establishment of a cold resistance model42
Cover crops and controlled-release urea decrease need for mineral nitrogen fertilizer for cotton in sandy soil42
Sequential submergence and drought induce yield loss in rice by affecting redox homeostasis and source-to-sink sugar transport42
Application of multi-layer neural network and hyperspectral reflectance in genome-wide association study for grain yield in bread wheat42
Adverse consequences of herbicide residues on legumes in dryland agriculture41
Effect of two alleles of Tiller Angle Control 1 on grain yield and dry matter production in rice41
Morphogenesis of ratoon crops in response to preharvest nitrogen application in japonica rice40
Feeding ducks in ratoon rice field reduces weed competition with ratoon rice in central China40
Efficient fertilization pattern for rice production within the rice-wheat systems40
Can the allometric relationship between saturated water accumulation and dry mass be used to diagnose the water status of winter wheat?40
Improving winter barley adaptation to freezing and heat stresses in the U.S. Midwest: bottlenecks and opportunities40
Diversified grain rotations can be highly and reliably productive in unstable climates40
Tropical pastures add value to grazing systems in temperate environments of Eastern Australia40
Digital twin-based winter wheat growth simulation and optimization39
Genetic yield improvements and associated physiological and agronomic traits in soybean cultivars released from 1940 to 2021 in Northeast China39
Optimizing nitrogen application patterns and amounts to improve maize yield and water-nitrogen use efficiencies in the Loess Plateau of China: A meta-analysis39
Soil-plant water dynamics, yield, quality and profitability of spring sweet corn under variable irrigation scheduling, crop establishment and moisture conservation practices39
Improving grain quality and nitrogen use efficiency of cereal-based cropping systems on vertisols in semi-arid tropics39
Lodging prevention in cereals: Morphological, biochemical, anatomical traits and their molecular mechanisms, management and breeding strategies39
Optimized tillage regimes in a rice-oilseed rape rotation system enhance system productivity by delaying post-flowering senescence39
Soil water availability and water absorption by maize in sodic soils with high water table39
How do integrated agronomic practices enhance sunflower productivity and stability in saline-alkali soils of arid regions? Evidence from China39
Modified TAL expression in rice plant regulates yield components and grain quality in a N-rate dependent manner39
UAV-based precision nitrogen management balances agronomic, economic, and environmental multi-objective benefits in rice production38
Polypeptide urea increases rice yield and nitrogen use efficiency through root growth improvement38
Morphological responses in peanut pod development to intercropping and nitrogen application rates38
Impact of seed maturity on season-long physiological performance and offspring seed quality in peanut (Arachis hypogaea L.)38
Seeding rate, fertiliser and herbicide effects on canopy growth and productivity of direct-seeded rice (DSR) under different management practices38
Optimized controlled-release nitrogen strategy achieves high yield and nitrogen use efficiency of wheat following rice in the lower reaches of Yangtze River of China37
Optimizing water management in water-saving and drought-resistant rice cultivation reduces methane emissions with enhanced net economic benefits37
Coupling decision of water and nitrogen application in winter wheat via UAV hyperspectral imaging37
Mitigation of soil acidification is critical for reducing GHG emission and improving soil quality, crop yield and farm economic benefits: Evidence from a global meta-analysis37
Water-saving management sustains yield of both ordinary paddy rice and drought-resistance rice varieties with reduced irrigation water in ratoon rice production of Central China37
A VI-based phenology adaptation approach for rice crop monitoring using UAV multispectral images36
Modelling the integrated strategies of deficit irrigation, nitrogen fertilization, and biochar addition for winter wheat by AquaCrop based on a two-year field study36
Genetic progress of malting barley potential grain yield between 1982 and 2019 in Argentina36
Enhancing crop resilience: Understanding the role of drought priming in wheat stress response36
Optimizing maize productivity: A sustainable approach integrating straw derivatives and film mulching in rainfed agriculture36
Influence of soil management and previous crop nitrogen fertilization on alfalfa productivity in Mediterranean agroecosystems35
Sorghum producer yield contest: A synthesis-analysis of major management and environmental drivers35
Combining UAV and Sentinel-2 satellite multi-spectral images to diagnose crop growth and N status in winter wheat at the county scale35
Mapping the ratoon rice suitability region in China using random forest and recursive feature elimination modeling35
Prospects for soybean production increase by closing yield gaps in the Northeast Farming Region, China35
Integrated straw-derived biochar utilization to increase net ecosystem carbon budget and economic benefit and reduce the environmental footprint35
Functional and mechanistic assessment of plant-available soil phosphorus greatly improved the multisite diagnosis of maize yield response34
Melatonin enhances waterlogging tolerance of field-grown cotton through quiescence adaptation and compensatory growth strategies34
Mapping cropland suitability in China using optimized MaxEnt model34
Trade-offs between agronomic and environmental benefits: A comparison of inhibitors with controlled release fertilizers in global maize systems34
Enhancing productivity and profitability of quinoa through optimization of plant spacing and weeding regimes34
Multi-objective optimization of water and nitrogen regimes for drip-fertigated sugar beet in a desert climate34
Grain yield, anthesis-silking interval, and phenotypic plasticity in response to changing environments: Evaluation in temperate maize hybrids33
Environmental clues for yield performance and stability of Spanish bread wheat landraces33
Nitrogen fertilization levels and timing affect the plasticity of yield components in bread wheat (Triticum aestivum L.)33
Bridging yield gaps in rice production through integrated crop and nutrient management with farmer groups33
Phosphorus application affected cottonseed kernel yield and nutritional quality by improving oil yield and quality of two cotton (Gossypium hirsutum L.) cultivars differing in phosphorus sensitivity33
Effects of expanding cassava planting and harvesting windows on root yield, starch content and revenue in southwestern Nigeria33
Editorial Board33
Root distribution and fibre composition of intergeneric F1 hybrid between sugarcane and E. arundinaceus33
Rehabilitative capacity of amendments to restore maize productivity following artificial topsoil erosion/ deposition33
Critical nitrogen and potassium dilution curves for potato in Northeast China32
Impact of intercropping and low-external input integrated pest management on Spodoptera frugiperda (J. E. Smith) in maize32
Growth, photosynthesis and yield of soybean in ridge-furrow intercropping system of soybean and flax32
Rice-crab coculture produces higher carbon sink and eco-economic benefits32
Regulation of subsurface drip fertigation on nitrogen cycling soil microorganisms and N2O and NH3 emissions from aeolian sandy soil in alfalfa field in temperate arid regions32
The use of small emitter flow rate favored the transfer of N2O production to deeper soil to reduce yield-scaled emissions in drip-irrigated potato fields32
Analysis of factors controlling maize yield response to hairy vetch and to nitrogen fertilization after hairy vetch32
Modeling drought stress impacts under current and future climate for peanut in the semiarid pampas region of Argentina32
Improvements in grain yield and nutrient utilization efficiency of japonica inbred rice released since the 1980s in eastern China32
Projected impacts of sowing date and cultivar choice on the timing of heat and drought stress in spring barley grown along a European transect31
Effects of skip-row planting on grain yield and quality of mechanized ratoon rice31
Yield and water-use related traits in landrace and new soybean cultivars in arid and semi-arid areas of China31
Organic substitution regime with optimized irrigation improves potato water and nitrogen use efficiency by regulating soil chemical properties rather than microflora structure31
Plastic film mulching does not increase the seedcotton yield due to the accelerated late-season leaf senescence of short-season cotton compared with non-mulching31
Optimizing arrangement and density in maize and alfalfa intercropping and the reduced incidence of the invasive fall armyworm (Spodoptera frugiperda) in southern China31
Optimizing stubble returning rate in mulched farmland to balance trade-offs between greenhouse gas emission and maize yield under climate change31
Microbial biofortification: A sustainable route to grow nutrient-rich crops under changing climate31
Mitigating the negative effect of warming on crop yield: Assessing the carbon fertilization and organic amendment application effect31
Twenty-one years’ impact of using organic amendments on the productivity of rice-wheat rotation and soil properties31
Enhancing nitrogen use efficiency in paddy fields: The role of livestock integration and rice-soybean rotation31
Synergistic impact of various straw-return methods and irrigation regimes on winter wheat physiological growth and yield31
Intercropping with appropriate nitrogen reduction achieves the trade-off among soil biological health, soil multifunctionality, and crop productivity31
Nitrogen management to reduce GHG emissions while maintaining high crop productivity in temperate summer rainfall climate30
APSIM next generation mungbean model: A tool for advancing mungbean production30
Enhancing maize yield and water productivity through coordinated root-shoot growth under mild water stress in dense planting30
Paclobutrazol enhances lodging resistance and yield of direct-seeded rice by optimizing plant type and canopy light transmittance30
Envirotyping to control genotype x environment interactions for efficient soybean breeding30
How much can Zn or Fe fertilization contribute to Zn and Fe mass concentration in rice grain? A global meta-analysis30
Redefining soybean critical period for yield determination29
Pixel-based yield mapping and prediction from Sentinel-2 using spectral indices and neural networks29
Effects of heat and drought on canola (Brassica napus L.) yield, oil, and protein: A meta-analysis29
Decomposing crop model uncertainty: A systematic review29
The long-term nitrogen fertilizer management strategy based on straw return can improve the productivity of wheat-maize rotation system and reduce carbon emissions by increasing soil carbon and nitrog29
Stable isotope composition of long and short term carbon pools can screen drought tolerance in cassava28
Editorial Board28
Light interception and conversion efficiencies and biomass partitioning in sugarcane varieties with varying canopy architecture under subtropical conditions28
Corrigendum to “Long-term straw return enhanced crop yield by improving ecosystem multifunctionality and soil quality under triple rotation system: An evidence from a 15 years study” [Field Crops Res.28
Effects of 12-year cropping systems and tillage practices on crop yield and carbon trade-off in dryland Loess Plateau28
Are intercropping systems more productive than monocultures in terms of forage yield and subsequent silage quality for ruminants? A meta-analysis28
Maize straw application shows regional-scale improvements to soil fertility and crop yields in Chinese croplands: A meta-analysis28
Pollinators significantly enhance seed set, yields and chemical parameters of oil seed in sunflower crops28
Analysis of factors affecting the nutritional composition of roughage using existing data: A case study on China and Africa28
Effects of soil management strategies on maize and soybean yields in northeast China: A meta-analysis27
Editorial Board27
Improved sustainability of grain production by intercropping and partial organic substitution in the North China Plain27
Simulating long-term phosphorus, nitrogen, and carbon dynamics to advance nutrient assessment in dryland cropping27
Determinants of grain number responding to environmental and genetic factors in two- and six-rowed barley types27
How much control do smallholder maize farmers have over yield?27
Identification of sugarcane stages prone to root and stem lodging and the role of nitrogen management in enhancing resilience27
Impact of no-tillage and reduced nitrogen input on corn yield and nitrogen efficiency in the corn belt of northeast China27
Relationship between agricultural water and soil resources carrying capacity and crop yield with long-term plastic film mulching coupled with fertilization27
Tiller growth and mortality in winter wheat as affected by carbon and nitrogen partitioning via stem internode structure26
Editorial Board26
Optimizing water and nitrogen management can enhance nitrogen heterogeneity and stimulate root foraging26
Prescreening rice for cold tolerance at the reproductive stage using anther length26
Do biopores created by perennial fodder crops improve the growth of subsequent annual crops? A synthesis of multiple field experiments26
Straw return amplifies the stimulated impact of night-warming on N2O emissions from wheat fields in a rice-wheat rotation system26
Orychophragmus violaceus-maize rotation increases maize productivity by improving soil chemical properties and plant nutrient uptake26
Effect of crop combination on yield performance, nutrient uptake, and land use advantage of cereal/legume intercropping systems26
Alfalfa water productivity and yield gaps in the U.S. central Great Plains26
Optimizing brackish water and nitrogen application regimes for soil salinity, yield, fertilizer and water productivity of a mulched drip irrigated cotton cropping system25
Rhizobacteria shaped by long-term fertilization and wheat nutritional requirements improve grain yield and soil multifunctionality25
Nitrogen responsiveness of leaf growth, radiation use efficiency and grain yield of maize (Zea mays L.) in Northeast China25
Rotational grass-legume leys increase arable crop yields, particularly at low N fertiliser rates25
Optimizing application strategies of prohexadione-calcium·uniconazole composite regulator to improve lodging resistance and grain yield in rice cultivation in East China25
Optimizing fertilization rate can maintain the greenhouse gas mitigation effect of no-tillage: A global-scale meta-analysis25
Ridge–furrow planting with film mulching and biochar addition can enhance the spring maize yield and water and nitrogen use efficiency by promoting root growth25
Effects of free-air temperature increase on grain yield and greenhouse gas emissions in a double rice cropping system25
Simulating drought tolerance of peanut varieties by maintaining photosynthesis under water deficit25
Optimizing the planting time and stand density of sunn hemp intercropping for biomass productivity and competitiveness in a maize-based system25
Soil carbon and nitrous oxide dynamics in corn (Zea mays L.) production under different nitrogen, tillage and residue management practices25
Effective GAI is best estimated from reflectance observations as compared to GAI and LAI: Demonstration for wheat and maize crops based on 3D radiative transfer simulations25
Ensemble machine learning for modeling greenhouse gas emissions at different time scales from irrigated paddy fields25
Biological nitrogen fixation and prospects for ecological intensification in cereal-based cropping systems25
Evaluate the sensitivity of rapeseed lodging under low light:A field study on the biomechanics of stem and root lodging in rapeseed (Brassica napus L.)24
Co-implementation of tillage, irrigation, and fertilizers in soybean: Impact on crop productivity, soil moisture, and soil microbial dynamics24
Using a cropping system approach to manage iron deficiency chlorosis in soybean24
Editorial Board24
Soybean yield variations and the potential of intercropping to increase production in China24
Effects of long-term straw returning on rice yield and soil properties and bacterial community in a rice-wheat rotation system24
Editorial Board24
Pre- and post-flowering impacts of natural heatwaves on yield components in wheat24
Benchmarking sorghum and maize for both yield and economic advantage in the US Great Plains24
Effects of long-term substitution of chemical fertilizer with Chinese milk vetch on soil phosphorus availability and leaching risk in the double rice systems of Eastern China24
Editorial Board24
Editorial Board24
Rapeseed-pea intercrop outperforms wheat-legume ones in land-use efficiency in Mediterranean conditions23
The rate dependent efficacy of biochar for crop yield and nutrition on Podzols newly converted from boreal forests23
Aerial phenotyping for sugarcane yield and drought tolerance23
Adjusted CBA-Wheat model for predicting aboveground biomass in winter wheat from hyperspectral data23
Integrated straw return and nitrogen management improve grain zinc in wheat grown on calcareous soils23
Agricultural intensification effects on spatial growth variability of staple crops in south India23
Combining satellite-sensed and ground data and the BASGRA model to predict grass yield in high-latitude regions23
Improving spring maize yield while mitigating nitrogen losses under film mulching system by right fertilization and planting placement23
Higher yields of modern maize cultivars are not associated with coordinated light and N distribution within the canopy23
Sugarcane/soybean intercropping enhances crop productivity, nutrient uptake, and net economic return with reduced inputs23
Revisiting plant density by environment interaction in maize across contrasting sowing dates23
Yield has minimal effect on whole-grain mineral density of modern soft wheat compared to production environment, genotype, and test weight23
Assessment of nitrogen status in maize-soybean intercropping system by establishing a novel critical nitrogen dilution curve under different irrigation amounts23
The stale-drill establishment method for rice: Weed community, rice stand development, and yield components of two vigorous japonica cultivars23
Sugar kelp application for sustainable potato production in Prince Edward Island: Impacts on soil, greenhouse gas emissions, and yield23
Understanding fiber quality in field-grown shaded cotton: Nitrogen fertilization implications23
Trade-offs between forage nutrition and ruminant carrying capacity in response to fertiliser application – Findings from the Park Grass long-term experiment (1860–2020)23
Evaluating differences among crop models in simulating soybean in-season growth22
Optimum total nitrogen application is required to reduce the yield loss of hybrid rice to high temperature22
Plastic film mulching and biochar amendment enhance maize yield and nitrogen fertilizer use efficiency by reducing gaseous nitrogen losses22
High soil strength and cereal crop responses to deeper tillage on sandy soils in a semi-arid environment22
Phosphorus management strategies to increase lowland rice yields in sub-Saharan Africa: A review22
Nitrogen losses trade-offs through layered fertilization to improve nitrogen nutrition status and net economic benefit in wheat-maize rotation system22
Assessing the effect of split and additional late N fertilisation on N economy of maize22
Bed, ridge and planting configurations influence crop performance in field-transplanted hybrid potato crops22
Smart nutrient management Nutrient Expert® enhances rice productivity through adjusting source-sink relationships during grain filling22
Biofortified legumes: Present scenario, possibilities and challenges22
Nitrogen transfer and yield effects of legumes intercropped with the perennial grain crop intermediate wheatgrass22
Improving prediction accuracy of CSM-CERES-Wheat model for water and nitrogen response using a modified Penman-Monteith equation in a semi-arid region22
Post-anthesis moderate soil-drying facilitates source-to-sink remobilization of nitrogen via redistributing cytokinins in rice22
Nano calcium carbonate improves wheat nitrogen accumulation and grain yield by enhancing soil nitrogen supply and flag leaf photosynthetic characteristics22
Maize yield increased by matching canopy light and nitrogen distribution via controlled-release urea /urea adjustment22
Modeling for agroecological protection of rice. A review22
Soil physical stresses beyond the dynamic least limiting water range determine crop yields in wheat-maize system in a Vertisol22
Precise delivery of nitrogen at tillering stage enhances grain yield and nitrogen use efficiency in double rice cropping systems of South China22
Prediction of rainfed corn evapotranspiration and soil moisture using the STICS crop model in eastern Canada22
Tillering and nitrogen economy of low-density maize crops22
Conservation agriculture practices drive maize yield by regulating soil nutrient availability, arbuscular mycorrhizas, and plant nutrient uptake21
Physiological drivers of responses of grains per m2 to environmental and genetic factors in wheat21
Controlled irrigation can mitigate the greenhouse effects of rice paddy fields with long-term straw return and stimulate microbial necromass carbon accumulation21
Reduction of chemical phosphate fertilizer application in a rice–rapeseed cropping system through continuous straw return21
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