Publications

Macholdt, J., Gyldengren, J.G., Diamantopoulos, E. & Styczen, M.E. (2020) How will future climate depending agronomic management impact the yield risk of wheat cropping systems? A regional case study of Eastern Denmark. The Journal of Agricultural Science 158, 660–675.

Macholdt, J., Hadasch, S., Macdonald, A., Perryman, S., Piepho, H.-P., Scott, T., Styczen, M.E. & Storkey, J. (2023) Long-term trends in yield variance of temperate managed grassland. Agronomy for Sustainable Development 43, 37.

Macholdt, J. &  Honermeier, B. (2018): Stability analysis for grain yield of winter wheat in a long-term field experiment, Archives of Agronomy and Soil Science, DOI: 10.1080/03650340.2018.1520979

Macholdt, J., Piepho, H.-P. & Honermeier, B. (2019) Mineral NPK and manure fertilisation affecting the yield stability of winter wheat: Results from a long-term field experiment. European Journal of Agronomy 102, 14–22.

Macholdt, J., Piepho, H.-P. & Honermeier, B. (2019) Does fertilization impact production risk and yield stability across an entire crop rotation? Insights from a long-term experiment. Field Crops Research 238, 82–92.

Macholdt, J., Piepho, H.-P., Honermeier, B., Perryman, S., Macdonald, A. & Poulton, P. (2020) The effects of cropping sequence, fertilization and straw management on the yield stability of winter wheat (1986–2017) in the Broadbalk Wheat Experiment, Rothamsted, UK. The Journal of Agricultural Science 158, 65–79.

Macholdt, J., Styczen, M.E., Macdonald, A., Piepho, H.-P. & Honermeier, B. (2020) Long-term analysis from a cropping system perspective: Yield stability, environmental adaptability, and production risk of winter barley. European Journal of Agronomy 117, 126056.

Manenti, L., Macholdt, J., Garcia, F.O. & Rubio, G. (2023) Resilience of maize, wheat, and soybean cropping systems as affected by fertilization: Analysis of a long‐term field network. Agronomy Journal, agj2.21325.

Niether, W., Macholdt, J., Schulz, F. & Gattinger, A. (2023) Yield dynamics of crop rotations respond to farming type and tillage intensity in an organic agricultural long-term experiment over 24 years. Field Crops Research 303, 109131. DOI: 10.1016/j.fcr.2023.109131

Reckling, M., Ahrends, H., Chen, T.-W., Eugster, W., Hadasch, S., Knapp, S., Laidig, F., Linstädter, A., Macholdt, J., Piepho, H.-P., Schiffers, K. & Döring, T.F. (2021) Methods of yield stability analysis in long-term field experiments. A review. Agronomy for Sustainable Development 41, 27.

Studnicki, M., Macholdt, J., Macdonald, A. & Stępień, W. (2021) Effects of Fertilizers and Manures on Temporal Yield Variability of Winter Rye. Agronomy 11, 519.

Stumpf, B., Glendining, M., Grosse, M., Hoffmann, C., Joschko, M., König, S., Kroschewski, B., Cardoso Lisboa, C., Macdonald, A., Macholdt, J., Makádi, M., Ostler, R., Perryman, S., Piepho, H., Schnell, S., Storkey, J., Vaziritabar, Y., Weller, U., Honermeier, B. (2021). Long-Term-Experiments – methods, standardization and modelling. BonaRes Series. DOI: 10.20387/bonares-fzk2-tf22

Garz, J., Schliephake, W. & Merbach, W. (2000) Changes in the subsoil of long-term trials in Halle (Saale), Germany, caused by mineral fertilization. Journal of Plant Nutrition and Soil Science 163, 663–668.

Garz, J., Stumpe, H., Schliephake, W. & Hagedorn, E. (1996) Ertragsentwicklung im Dauerversuch Ewiger Roggenbau Halle nach den 1990 vorgenommenen Umstellungen in der Düngung. Zeitschrift für Pflanzenernährung und Bodenkunde 159, 373–376.

Körschens, M. (2006) The importance of long-term field experiments for soil science and environmental research–a review. Plant Soil Environ 52, 1–8. Citeseer.

Merbach, W. & Deubel, A. (2007) The Long-Term Fertilization trials in Halle (Saale), Germany: a tool for sustainable and environmentally compatible land management – contributions of plant nutrition science in Halle 132., rev. Ed. Dt. Uni.-Verl. [u.a.], Wiesbaden.

Merbach, W., Garz, J., Schliephake, W., Stumpe, H. & Schmidt, L. (2000) The long-term fertilization experiments in Halle (Saale), Germany — Introduction and survey. Journal of Plant Nutrition and Soil Science 163, 629–638.

Böttcher, H., Garz, J., & Weipert, D. (2000). Auswirkungen unterschiedlicher Düngung auf Ertrag und Verarbeitungsqualität des Roggens bei langjährigem Anbau in Selbstfolge und Fruchtwechsel – Ergebnisse des Dauerversuches „Ewiger Roggenbau“.

Chmielewski, F. (1992). Impact of climate changes on crop yields of winter rye in Halle (southeastern Germany), 1901 to 1980. Climate Research, 2, 23–33. doi: 10.3354/cr002023

Ellerbrock, R. H., & Kaiser, M. (2005). Stability and composition of different soluble soil organic matter fractions–evidence from δ13C and FTIR signatures. Geoderma, 128(1–2), 28–37. doi: 10.1016/j.geoderma.2004.12.025

Flessa, H., Ludwig, B., Heil, B., & Merbach, W. (2000). The Origin of Soil Organic C, Dissolved Organic C and Respiration in a Long-Term Maize Experiment in Halle, Germany, Determined by13C Natural Abundance. Journal of Plant Nutrition and Soil Science, 163(2), 157–163. doi: 10.1002/(SICI)1522-2624(200004)163:2<157::AID-JPLN157>3.0.CO;2-9

Garz, J., Stumpe, H., Schliephake, W., & Hagedorn, E. (1996). Ertragsentwicklung im Dauerversuch Ewiger Roggenbau Halle nach den 1990 vorgenommenen Umstellungen in der Düngung. Zeitschrift für Pflanzenernährung und Bodenkunde, 159(4), 373–376. doi: 10.1002/jpln.1996.3581590410

Hamer, U., & Marschner, B. (2005). Priming effects in different soil types induced by fructose, alanine, oxalic acid and catechol additions. Soil Biology and Biochemistry, 37(3), 445–454. doi: 10.1016/j.soilbio.2004.07.037

Herbst, F., Schmidt, L., & Merbach, W. (2017). Die Entwicklung des Ertragsniveaus im „Ewigen Roggenbau“ in Halle/S. seit 1879. Journal für Kulturpflanzen, 189–197. doi: 10.5073/JFK.2017.06.01

Hütsch, B. W. (1996). Methane oxidation in soils of two long-term fertilization experiments in Germany. Soil Biology and Biochemistry, 28(6), 773–782. doi: 10.1016/0038-0717(96)88925-5

Hütsch, B. W. (2001). Methane oxidation, nitrification, and counts of methanotrophic bacteria in soils from a long-term fertilization experiment (”Ewiger Roggenbau” at Halle). Journal of Plant Nutrition and Soil Science, 164(1), 21–28. doi: 10.1002/1522-2624(200102)164:1<21::AID-JPLN21>3.0.CO;2-B

Hütsch, B. W. (2001). Methane oxidation in non-flooded soils as affected by crop production — invited paper. European Journal of Agronomy, 14(4), 237–260. doi: 10.1016/S1161-0301(01)00110-1

Jandl, G., Leinweber, P., & Schulten, H. R. (2006). Origin and fate of soil lipids in a Phaeozem under rye and maize monoculture in Central Germany. Biology and Fertility of Soils, 43(3), 321–332. doi: 10.1007/s00374-006-0109-2

John, B., Ludwig, B., & Flessa, H. (2003). Carbon dynamics determined by natural 13C abundance in microcosm experiments with soils from long-term maize and rye monocultures. Soil Biology and Biochemistry, 35(9), 1193–1202. doi: 10.1016/S0038-0717(03)00180-9

John, B., Ludwig, B., Potthoff, M., & Flessa, H. (2004). Carbon and nitrogen mineralization after maize harvest between and within maize rows: a microcosm study using 13 C natural abundance. Journal of Plant Nutrition and Soil Science, 167(3), 270–276. doi: 10.1002/jpln.200321255

Kaiser, M., & Ellerbrock, R. H. (2005). Functional characterization of soil organic matter fractions different in solubility originating from a long-term field experiment. Geoderma, 127(3–4), 196–206. doi: 10.1016/j.geoderma.2004.12.002

Kolbe, G., & Stumpe, H. (1969). Neunzig Jahre “Ewiger Roggenbau.” Archives of Agronomy and Soil Science, 13(10), 933–949. doi: 10.1080/03650346909412648

Kramer, C., & Gleixner, G. (2006). Variable use of plant- and soil-derived carbon by microorganisms in agricultural soils. Soil Biology and Biochemistry, 38(11), 3267–3278. doi: 10.1016/j.soilbio.2006.04.006

Kullmann, A. (1962). Über den Einfluß einiger Düngungsvarianten des Feldversuches “Ewiger Roggenbau” (Halle/S.) auf die Bodenstruktur. Archives of Agronomy and Soil Science, 6(10), 734–741. doi: 10.1080/03650346209412631

Langer, U., & Klimanek, E.-M. (2006). Soil microbial diversity of four German long-term field experiments. Archives of Agronomy and Soil Science, 52(5), 507–523. doi: 10.1080/03650340600915554

Leinweber, P., & Reuter, G. (1989). Influence of various fertilization on the mineralogical composition of clay fractions in long‐term field experiments. Zeitschrift Für Pflanzenernährung Und Bodenkunde, 152(4), 373–377. doi: 10.1002/jpln.19891520406

Leinweber, P., Reuter, G., & Schulten, H.-R. (1993). Organo-mineral soil clay fractions in fertilization experiments: mineralogy, amounts and quality of organic matter and influence on soil properties. Applied Clay Science, 8(4), 295–311. doi: 10.1016/0169-1317(93)90010-X

Leinweber, P., & Schulten, H.-R. (2000). Nonhydrolyzable forms of soil organic nitrogen: Extractability and composition. Journal of Plant Nutrition and Soil Science, 163(4), 433–439. doi: 10.1002/1522-2624(200008)163:4<433::AID-JPLN433>3.0.CO;2-F

Leinweber, P., Schulten, H.-R., & Horte, C. (1992). Differential thermal analysis, thermogravimetry and pyrolysis-field ionisation mass spectrometry of soil organic matter in particle-size fractions and bulk soil samples. Thermochimica Acta, 194, 175–187. doi: 10.1016/0040-6031(92)80016-P

Lenz, K. (1969). Auswirkungen fortgesetzt gleicher Düngung auf den Boden. Archives of Agronomy and Soil Science, 13(10), 919–932. doi: 10.1080/03650346909412647

Ludwig, B., John, B., Ellerbrock, R., Kaiser, M., & Flessa, H. (2003). Stabilization of maize-derived C in a sandy Haplic Phaeozem in a long-term maize experiment. European Journal of Soil Science, 54(1), 117–126. doi: 10.1046/j.1365-2389.2003.00496.x

Ludwig, B., Kuka, K., Franko, U., & von Lützow, M. (2008). Comparison of two quantitative soil organic carbon models with a conceptual model using data from an agricultural long‐term experiment. Journal of Plant Nutrition and Soil Science, 171(1), 83–90. doi: 10.1002/jpln.200700053

Miltner, A., Kopinke, F.-D., Kindler, R., Selesi, D., Hartmann, A., & Kästner, M. (2005). Non-phototrophic CO 2 fixation by soil microorganisms. Plant and Soil, 269(1–2), 193–203. doi: 10.1007/s11104-004-0483-1

Miltner, A., Richnow, H.-H., Kopinke, F.-D., & Kästner, M. (2004). Assimilation of CO2 by soil microorganisms and transformation into soil organic matter. Organic Geochemistry, 35(9), 1015–1024. doi: 10.1016/j.orggeochem.2004.05.001

Müller, P., & Reiher, W. (1966). Auswertung langjähriger Ertragsfeststellungen (dargestellt am Versuch „Ewiger Roggenbau“ in Halle). Archives of Agronomy and Soil Science, 10(1), 43–54. doi: 10.1080/03650346609414016

Narula, N., Deubel, A., Gans, W., Behl, R. K., & Merbach, W. (2006). Paranodules and colonization of wheat roots by phytohormone producing bacteria in soil. Plant, Soil and Environment, 52(3), 119–129. doi: 10.17221/3355-PSE

Narula, N., Deubel, A., Gransee, A., Kumar Behl, R., & Merbach, W. (2002). Impact of fertilizers on total microbiological flora in planted and unplanted soils of long-term fertilization experiment. Archives of Agronomy and Soil Science, 48(3), 171–180. doi: 10.1080/03650340213838

Poll, C., Thiede, A., Wermbter, N., Sessitsch, A., & Kandeler, E. (2003). Micro-scale distribution of microorganisms and microbial enzyme activities in a soil with long-term organic amendment: Micro-scale distribution of soil microorganisms. European Journal of Soil Science, 54(4), 715–724. doi: 10.1046/j.1351-0754.2003.0569.x

Rauhe, K., & Lehne, I. (1966). Betrachtungen zu den Ergebnissen des Dauerdüngungsversuches „Ewiger Roggenbau“ in Halle im Hinblick auf die Erhaltung der Bodenfruchtbarkeit 1. Mitteilung: Die Ertragsentwicklung. Archives of Agronomy and Soil Science, 10(1), 3–18. doi: 10.1080/03650346609414013

Rauhe, K., & Lehne, I. (1966). Betrachtungen zu den Ergebnissen des Dauerdüngungsversuches „Ewiger Roggenbau“ in Halle im Hinblick auf die Erhaltung der Bodenfruchtbarkeit 2. Mitteilung: Die Stickstoffentzüge und der Stickstoff im Boden. Archives of Agronomy and Soil Science, 10(1), 19–33. doi: 10.1080/03650346609414014

Rethemeyer, J., Grootes, P. M., Bruhn, F., Andersen, N., Nadeau, M. J., Kramer, C., & Gleixner, G. (2004). Age heterogeneity of soil organic matter. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 223–224, 521–527. doi: 10.1016/j.nimb.2004.04.098

Rethemeyer, J., Kramer, C., Gleixner, G., John, B., Yamashita, T., Flessa, H., Andersen, N., Nadeau, M.-J., & Grootes, P. M. (2005). Transformation of organic matter in agricultural soils: radiocarbon concentration versus soil depth. Geoderma, 128(1–2), 94–105. doi: 10.1016/j.geoderma.2004.12.017

Rethemeyer, J., Kramer, C., Gleixner, G., Wiesenberg, G., Schwark, L., Andersen, N., Nadeau, M.-J., & Grootes, P. M. (2004). Complexity of Soil Organic Matter: AMS 14 C Analysis of Soil Lipid Fractions and Individual Compounds. Radiocarbon, 46(1), 465–473. doi: 10.1017/S0033822200039771

Schliephake, W., Garz, J., & Stumpe, H. (1999). Verbleib des15N nach einmaliger Verabreichung von markiertem Düngerstickstoff im Dauerversuch Ewiger Roggenbau Halle. Journal of Plant Nutrition and Soil Science, 162(4), 429–436. doi: 10.1002/(SICI)1522-2624(199908)162:4<429::AID-JPLN429>3.0.CO;2-S

Schmidt, L., & Merbach, W. (2004). Reaktion des Boden-C- und N-Gehaltes auf Düngung – Ergebnisse von Dauerversuchen in Halle/S., Deutschland. Archives of Agronomy and Soil Science, 50(1), 49–57. doi: 10.1080/03650340310001627586

Schmidt, L., Warnstorff, K., Dörfel, H., Leinweber, P., Lange, H., & Merbach, W. (2000). The influence of fertilization and rotation on soil organic matter and plant yields in the long-termEternal Rye trial in Halle (Saale), Germany. Journal of Plant Nutrition and Soil Science, 163(6), 639–648. doi: 10.1002/1522-2624(200012)163:6<639::AID-JPLN639>3.0.CO;2-L

Schulten, H.-R., & Leinweber, P. (1991). Influence of long-term fertilization with farmyard manure on soil organic matter: Characteristics of particle-size fractions. Biology and Fertility of Soils, 12(2), 81–88. doi: 10.1007/BF00341480

Selesi, D., Schmid, M., & Hartmann, A. (2005). Diversity of Green-Like and Red-Like Ribulose-1,5-Bisphosphate Carboxylase/Oxygenase Large-Subunit Genes ( cbbL ) in Differently Managed Agricultural Soils. Applied and Environmental Microbiology, 71(1), 175–184. doi: 10.1128/AEM.71.1.175-184.2005

Wiesenberg, G., Schwark, L., & Schmidt, M. (2006). Extractable lipid contents and colour in particle-size separates and bulk arable soils. European Journal of Soil Science, 57(5), 634–643. doi: 10.1111/j.1365-2389.2005.00754.x

Wiesenberg, G., Schwark, L., & Schmidt, M. W. I. (2004). Improved automated extraction and separation procedure for soil lipid analyses: Improved extraction of soil lipids. European Journal of Soil Science, 55(2), 349–356. doi: 10.1111/j.1351-0754.2004.00601.x

Wiesenberg, G., Schwarzbauer, J., Schmidt, M., & Schwark, L. (2004). Source and turnover of organic matter in agricultural soils derived from n-alkane/n-carboxylic acid compositions and C-isotope signatures. Organic Geochemistry, 35(11–12), 1371–1393. doi: 10.1016/S0146-6380(04)00122-6

Beer, K. (1968). Der Einfluß von Kalkung und Düngung auf die Dynamik der Bodenmanganfraktionen und die Manganaufnahme der Pflanzen auf verschiedenen Böden der DDR. Archives of Agronomy and Soil Science, 12(1), 53–68. doi: 10.1080/03650346809413535

Garz, J., Hagemann, O., & Kolbe, G. (1969). Ergebnisse eines Kalkdüngungsversuches im Hinblick auf die Phosphaternährung der Pflanzen und die Beurteilung des Gehaltes der Böden an pflanzenaufnehmbarem Phosphat mittels chemischer Untersuchungsverfahren. Archives of Agronomy and Soil Science, 13(10), 961–971. doi: 10.1080/03650346909412650

Benkenstein, H., Pagel, H., & Krüger, W. (1998). Untersuchungen über den K‐Haushalt des Bodens in drei statischen Dauerversuchen Ostdeutschlands. Archives of Agronomy and Soil Science, 43(1), 45–58. doi: 10.1080/03650349809366024

Benkenstein, H., Pagel, H., & Krüger, W. (1998). Einfluss langjährig differenzierter K‐Düngung auf den K‐Haushalt der Unterböden von statischen Dauerversuchen. Archives of Agronomy and Soil Science, 43(4), 267–281. doi: 10.1080/03650349809366044

Garz, J., Scharf, H., Stumpe, H., Scherer, H. W., & Schliephake, W. (1993). Effect of potassium fertilization on some chemical soil properties in a long term trial on sandy loess.

Leinweber, P., & Reuter, G. (1989). Influence of various fertilization on the mineralogical composition of clay fractions in long‐term field experiments. Zeitschrift Für Pflanzenernährung Und Bodenkunde, 152(4), 373–377. doi: 10.1002/jpln.19891520406

Schilling, G., Eißner, H., Schmidt, L., & Peiter, E. (2016). Yield formation of five crop species under water shortage and differential potassium supply. Journal of Plant Nutrition and Soil Science, 179(2), 234–243. doi: 10.1002/jpln.201500407

Zörb, C., Senbayram, M., & Peiter, E. (2014). Potassium in agriculture – Status and perspectives. Journal of Plant Physiology, 171(9), 656–669. doi: 10.1016/j.jplph.2013.08.008

Buczko, U., van Laak, M., Eichler-Löbermann, B., Gans, W., Merbach, I., Panten, K., Peiter, E., Reitz, T., Spiegel, H., & von Tucher, S. (2018). Re-evaluation of the yield response to phosphorus fertilization based on meta-analyses of long-term field experiments. Ambio, 47(S1), 50–61. doi: 10.1007/s13280-017-0971-1

Finkel, O. M., Salas-González, I., Castrillo, G., Spaepen, S., Law, T. F., Teixeira, P. J. P. L., Jones, C. D., & Dangl, J. L. (2019). The effects of soil phosphorus content on plant microbiota are driven by the plant phosphate starvation response. PLOS Biology, 17(11), e3000534. doi: 10.1371/journal.pbio.3000534

Gransee, A., & Merbach, W. (2000). Phosphorus dynamics in a long-term P fertilization trial on Luvic Phaeozem at Halle. Journal of Plant Nutrition and Soil Science, 163(4), 353–357. doi: 10.1002/1522-2624(200008)163:4<353::AID-JPLN353>3.0.CO;2-B

Laak, M., Klingenberg, U., Peiter, E., Reitz, T., Zimmer, D., & Buczko, U. (2018). The equivalence of the Calcium‐Acetate‐Lactate and Double‐Lactate extraction methods to assess soil phosphorus fertility. Journal of Plant Nutrition and Soil Science, 181(5), 795–801. doi: 10.1002/jpln.201700366

Narula, N., Deubel, A., Gransee, A., Kumar Behl, R., & Merbach, W. (2002). Impact of fertilizers on total microbiological flora in planted and unplanted soils of long-term fertilization experiment. Archives of Agronomy and Soil Science, 48(3), 171–180. doi: 10.1080/03650340213838

Robbins, C., Thiergart, T., Hacquard, S., Garrido-Oter, R., Gans, W., Peiter, E., Schulze-Lefert, P., & Spaepen, S. (2018). Root-Associated Bacterial and Fungal Community Profiles of Arabidopsis thaliana Are Robust Across Contrasting Soil P Levels. Phytobiomes Journal, 2(1), 24–34. doi: 10.1094/PBIOMES-09-17-0042-R

Steinfurth, K., Börjesson, G., Denoroy, P., Eichler-Löbermann, B., Gans, W., Heyn, J., Hirte, J., Huyghebaert, B., Jouany, C., Koch, D., Merbach, I., Mokry, M., Mollier, A., Morel, C., Panten, K., Peiter, E., Poulton, P. R., Reitz, T., Rubæk, G. H., … Buczko, U. (2022). Thresholds of target phosphorus fertility classes in European fertilizer recommendations in relation to critical soil test phosphorus values derived from the analysis of 55 European long-term field experiments. Agriculture, Ecosystems & Environment, 332, 107926. doi: 10.1016/j.agee.2022.107926

Stumpe, H., Garz, J., & Scharf, H. (1994). Wirkung der Phosphatdüngung in einem 40jährigen Dauerversuch auf einer Sandlöß‐Braunschwarzerde in Halle. Zeitschrift für Pflanzenernährung und Bodenkunde, 157(2), 105–110. doi: 10.1002/jpln.19941570208

Kolbe, G., & Stumpe, H. (1967). Die Wirkung verschieden gelagerter Stallmiste auf Pflanzenertrag und Bodeneigenschaften: 1. Mitteilung: Erträge und Stickstoffentzüge. Archives of Agronomy and Soil Science, 11(10), 947–962. doi: 10.1080/03650346709413510

Leinweber, P., & Reuter, G. (1989). Influence of various fertilization on the mineralogical composition of clay fractions in long‐term field experiments. Zeitschrift Für Pflanzenernährung Und Bodenkunde, 152(4), 373–377. doi: 10.1002/jpln.19891520406

Leinweber, P., Reuter, G., & Schulten, H.-R. (1993). Organo-mineral soil clay fractions in fertilization experiments: mineralogy, amounts and quality of organic matter and influence on soil properties. Applied Clay Science, 8(4), 295–311. doi: 10.1016/0169-1317(93)90010-X

Leinweber, P., & Schulten, H.-R. (2000). Nonhydrolyzable forms of soil organic nitrogen: Extractability and composition. Journal of Plant Nutrition and Soil Science, 163(4), 433–439. doi: 10.1002/1522-2624(200008)163:4<433::AID-JPLN433>3.0.CO;2-F

Schmidt, L., & Merbach, W. (2004). Reaktion des Boden-C- und N-Gehaltes auf Düngung – Ergebnisse von Dauerversuchen in Halle/S., Deutschland. Archives of Agronomy and Soil Science, 50(1), 49–57. doi: 10.1080/03650340310001627586

Stumpe, H. (1967). Die Wirkung verschieden gelagerter Stallmiste auf Pflanzenertrag und Bodeneigenschaften: 2. Mitteilung: Veränderung einiger wichtiger Bodeneigenschaften. Archives of Agronomy and Soil Science, 11(10), 963–982. doi: 10.1080/03650346709413511

Stumpe, H., Garz, J., Schliephake, W., Wittenmayer, L., & Merbach, W. (2000). Effects of humus content, farmyard manuring, and mineral-N fertilization on yields and soil properties in a long-term trial. Journal of Plant Nutrition and Soil Science, 163(6), 657–662. doi: 10.1002/1522-2624(200012)163:6<657::AID-JPLN657>3.0.CO;2-L

Stumpe, H., & Kolbe, G. (1968). Die Wirkung von Stallmist- und Mineraldüngung auf Pflanzenertrag und Bodeneigenschaften. Archives of Agronomy and Soil Science, 12(1), 79–96. doi: 10.1080/03650346809413537

Stumpe, H., Wittenmayer, L., & Merbach, W. (2000). Effects and residual effects of straw, farmyard manuring, and mineral fertilization at Field F of the long-term trial in Halle (Saale), Germany. Journal of Plant Nutrition and Soil Science, 163(6), 649–656. doi: 10.1002/1522-2624(200012)163:6<649::AID-JPLN649>3.0.CO;2-H