Lecture given by Professor Malcolm Sumner, Department of Agronomy, University of Georgia, Athens ... more Lecture given by Professor Malcolm Sumner, Department of Agronomy, University of Georgia, Athens at the Waite Campus, University of Adelaide, 13.11.1992<br>This lecture is part of the Campus Seminars and Distinguished Lecturer Series, Waite Campus, University of Adelaide, 1991 – 1997. https://figshare.com/projects/Campus_Seminars_and_Distinguished_Lecturer_Series_Waite_Campus_University_of_Adelaide/17756
... Daniel I. Kaplan,* Malcolm E. Sumner, Paul M. Bertsch, and Domy C. Adriano ABSTRACT Dispersed... more ... Daniel I. Kaplan,* Malcolm E. Sumner, Paul M. Bertsch, and Domy C. Adriano ABSTRACT Dispersed colloidal clay particles may enhance the transport of environmental contaminants adsorbed to the colloid surfaces. ... of Georgia, Athens, GA 30602; and PM Bertsch, Div. ...
… of International Symposium Root Research and …, 2009
... arundinacea) and turf (Zoysia spp.), cotton (Gossypium hirsutum), maize (Zea mays), sorghum (... more ... arundinacea) and turf (Zoysia spp.), cotton (Gossypium hirsutum), maize (Zea mays), sorghum (Sorghum bicolor), and soybean (Glycine max) are presented ... and reduce the strength of pans all of which encourage root coverage of the subsoil (Reeve and Sumner, 1972; Radcliffe ...
The Diagnosis and Recommendation Integrated System (DRIS) was developed to incorporate the import... more The Diagnosis and Recommendation Integrated System (DRIS) was developed to incorporate the importance of nutrient balance into plant analysis. Yield and plant analysis data from five fertilizer trials conducted in the field during 2 years, using `Granex 33' onions (Allium cepa L.), were entered into a data bank. The trials consisting of a N4 × P4 × K4 × S4, a N4 × P4 × K4 × plant density4, two N4 × P4 × K4, and a 4N × 6S factorial were conducted on sandy Ultisols in Georgia. Significant yield responses resulted from the addition of P and N. Leaf samples were analyzed for N, P, K, S, Ca, Mg, Mn, Zn, Cu, and B. Nutrient data were expressed in ratio form, and the population with yields >45 Mg·ha–1 were used to calculate the DRIS norms. The proposed norms for N, P, K, Mg, and Cu were tested using published data from independently conducted field and greenhouse studies. By accurately diagnosing the most limiting nutrients, these norms successfully predicted yield responses to trea...
Http Dx Doi Org 10 1080 00103628709367906, Nov 11, 2008
... Soil test values and yields for soybeans (Glycine max L.) were collected for Alabama, Georgia... more ... Soil test values and yields for soybeans (Glycine max L.) were collected for Alabama, Georgia, and South Carolina experiment station plots and farmers' production fields. ... Page 2. 1380 EVANYLO AND SUMNER southeastern United States. ...
... Farina and Channon, 1988a ). In contrast, Ca 2+ from surface-applied gypsum can migrate easil... more ... Farina and Channon, 1988a ). In contrast, Ca 2+ from surface-applied gypsum can migrate easily as soluble CaSO 4 ( Reeve and Sumner, 1972 ; Farina and Channon, 1988b ; McCray et al., 1991 ; Farina et al., 2000b ). The Al 3 ...
Phosphogypsum (PG), an industrial by-product from phosphoric acid plants, is being used as an ame... more Phosphogypsum (PG), an industrial by-product from phosphoric acid plants, is being used as an ameliorant for acid soil infertility. Phosphogypsum is primarily CaSO 4 and contains F among several impurities. An increase in SO42-and F-ligands in soil solutions following amendment with PG is important for the alleviation of AI toxicity. In soil solutions containing abundant SO42-and F-, a measure of AI that is not complexed with either of the ligands represents phytotoxic AI. Alleviation of AI toxicity by SO42-in some instances is due to SO4 zinduced precipitation and/or sorption of AI. Some studies have demonstrated a decrease in AI toxicity by SO4 z-even though precipitation of AI was not evident. In such cases, formation of the AI-SO4 + ion-pair (predicted by speciation models) has been attributed as the reason for alleviation of AI toxicity. Recent evidence has indicated that the proportion of AI complexed with S042-was much greater than that predicted by using speciation models, which suggests that alleviation is not fully attributable to the formation of AIS04 + species. The existing colorimetric AI assay techniques have failed to discriminate AI complexed with SO42-and have therefore, proved to be unsuitable for determination of phytotoxic AI in solutions containing SO42-. Fractionation of AI complexed with SO4 z-by size exclusion chromatography (SEC) has permitted a more precise characterization of AI complexed with S04 z-which has been demonstrated as less phytotoxic than the uncomplexed AI. Therefore, size exclusion chromatography is a promising technique for characterization of phytotoxic AI in solutions in the presence of S042-. In solutions containing F-, alleviation of AI toxicity is due to formation of AI-F complexes which are less phytotoxic. T h e 8-hydroxyquinoline method with a 15 second reaction time excludes AI-F complexes and, therefore is a measure of phytotoxic AI in solutions containing F- .
... Aluminum speciation in solutions predicted by GEO-CHEM program showed an increase in concentr... more ... Aluminum speciation in solutions predicted by GEO-CHEM program showed an increase in concentration of F com-plexed Al species with an increase in concentration of F&#x27;. A very poor relationship was observed between tap root length and the sum of ... AD Noble, Dep. ...
In the previous chapter, the process of production was presented as a universal property of veget... more In the previous chapter, the process of production was presented as a universal property of vegetation, which provides the organic energy transformations that operate the living part of the biosphere. The discussion not only described the physiological actions that lead to the production that humans or other animals can use but also describes the regional patterns of production and then, in the final section, applies this information to forest systems. This is a logical place to begin because forest systems dominate the earth, considering the gradient of the boreal, temperate and tropical forest, with variants such as the Mediterranean, Pacific coast coniferous, and other forest types that make up the world biomes. Grasslands, tundra, and deserts represent other biomes that are unforested and have lower rates of production because of environmental limitations.
Lecture given by Professor Malcolm Sumner, Department of Agronomy, University of Georgia, Athens ... more Lecture given by Professor Malcolm Sumner, Department of Agronomy, University of Georgia, Athens at the Waite Campus, University of Adelaide, 13.11.1992<br>This lecture is part of the Campus Seminars and Distinguished Lecturer Series, Waite Campus, University of Adelaide, 1991 – 1997. https://figshare.com/projects/Campus_Seminars_and_Distinguished_Lecturer_Series_Waite_Campus_University_of_Adelaide/17756
... Daniel I. Kaplan,* Malcolm E. Sumner, Paul M. Bertsch, and Domy C. Adriano ABSTRACT Dispersed... more ... Daniel I. Kaplan,* Malcolm E. Sumner, Paul M. Bertsch, and Domy C. Adriano ABSTRACT Dispersed colloidal clay particles may enhance the transport of environmental contaminants adsorbed to the colloid surfaces. ... of Georgia, Athens, GA 30602; and PM Bertsch, Div. ...
… of International Symposium Root Research and …, 2009
... arundinacea) and turf (Zoysia spp.), cotton (Gossypium hirsutum), maize (Zea mays), sorghum (... more ... arundinacea) and turf (Zoysia spp.), cotton (Gossypium hirsutum), maize (Zea mays), sorghum (Sorghum bicolor), and soybean (Glycine max) are presented ... and reduce the strength of pans all of which encourage root coverage of the subsoil (Reeve and Sumner, 1972; Radcliffe ...
The Diagnosis and Recommendation Integrated System (DRIS) was developed to incorporate the import... more The Diagnosis and Recommendation Integrated System (DRIS) was developed to incorporate the importance of nutrient balance into plant analysis. Yield and plant analysis data from five fertilizer trials conducted in the field during 2 years, using `Granex 33' onions (Allium cepa L.), were entered into a data bank. The trials consisting of a N4 × P4 × K4 × S4, a N4 × P4 × K4 × plant density4, two N4 × P4 × K4, and a 4N × 6S factorial were conducted on sandy Ultisols in Georgia. Significant yield responses resulted from the addition of P and N. Leaf samples were analyzed for N, P, K, S, Ca, Mg, Mn, Zn, Cu, and B. Nutrient data were expressed in ratio form, and the population with yields >45 Mg·ha–1 were used to calculate the DRIS norms. The proposed norms for N, P, K, Mg, and Cu were tested using published data from independently conducted field and greenhouse studies. By accurately diagnosing the most limiting nutrients, these norms successfully predicted yield responses to trea...
Http Dx Doi Org 10 1080 00103628709367906, Nov 11, 2008
... Soil test values and yields for soybeans (Glycine max L.) were collected for Alabama, Georgia... more ... Soil test values and yields for soybeans (Glycine max L.) were collected for Alabama, Georgia, and South Carolina experiment station plots and farmers' production fields. ... Page 2. 1380 EVANYLO AND SUMNER southeastern United States. ...
... Farina and Channon, 1988a ). In contrast, Ca 2+ from surface-applied gypsum can migrate easil... more ... Farina and Channon, 1988a ). In contrast, Ca 2+ from surface-applied gypsum can migrate easily as soluble CaSO 4 ( Reeve and Sumner, 1972 ; Farina and Channon, 1988b ; McCray et al., 1991 ; Farina et al., 2000b ). The Al 3 ...
Phosphogypsum (PG), an industrial by-product from phosphoric acid plants, is being used as an ame... more Phosphogypsum (PG), an industrial by-product from phosphoric acid plants, is being used as an ameliorant for acid soil infertility. Phosphogypsum is primarily CaSO 4 and contains F among several impurities. An increase in SO42-and F-ligands in soil solutions following amendment with PG is important for the alleviation of AI toxicity. In soil solutions containing abundant SO42-and F-, a measure of AI that is not complexed with either of the ligands represents phytotoxic AI. Alleviation of AI toxicity by SO42-in some instances is due to SO4 zinduced precipitation and/or sorption of AI. Some studies have demonstrated a decrease in AI toxicity by SO4 z-even though precipitation of AI was not evident. In such cases, formation of the AI-SO4 + ion-pair (predicted by speciation models) has been attributed as the reason for alleviation of AI toxicity. Recent evidence has indicated that the proportion of AI complexed with S042-was much greater than that predicted by using speciation models, which suggests that alleviation is not fully attributable to the formation of AIS04 + species. The existing colorimetric AI assay techniques have failed to discriminate AI complexed with SO42-and have therefore, proved to be unsuitable for determination of phytotoxic AI in solutions containing SO42-. Fractionation of AI complexed with SO4 z-by size exclusion chromatography (SEC) has permitted a more precise characterization of AI complexed with S04 z-which has been demonstrated as less phytotoxic than the uncomplexed AI. Therefore, size exclusion chromatography is a promising technique for characterization of phytotoxic AI in solutions in the presence of S042-. In solutions containing F-, alleviation of AI toxicity is due to formation of AI-F complexes which are less phytotoxic. T h e 8-hydroxyquinoline method with a 15 second reaction time excludes AI-F complexes and, therefore is a measure of phytotoxic AI in solutions containing F- .
... Aluminum speciation in solutions predicted by GEO-CHEM program showed an increase in concentr... more ... Aluminum speciation in solutions predicted by GEO-CHEM program showed an increase in concentration of F com-plexed Al species with an increase in concentration of F&#x27;. A very poor relationship was observed between tap root length and the sum of ... AD Noble, Dep. ...
In the previous chapter, the process of production was presented as a universal property of veget... more In the previous chapter, the process of production was presented as a universal property of vegetation, which provides the organic energy transformations that operate the living part of the biosphere. The discussion not only described the physiological actions that lead to the production that humans or other animals can use but also describes the regional patterns of production and then, in the final section, applies this information to forest systems. This is a logical place to begin because forest systems dominate the earth, considering the gradient of the boreal, temperate and tropical forest, with variants such as the Mediterranean, Pacific coast coniferous, and other forest types that make up the world biomes. Grasslands, tundra, and deserts represent other biomes that are unforested and have lower rates of production because of environmental limitations.
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