Search Results - "Cox, F.R"

Range in soil phosphorus critical levels with time by Cox, F.R. (North Carolina State Univ., Raleigh, NC)

“…Soil test interpretations differ according to the mathematical function used to determine the critical level, and they also differ because the critical level…”
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Zinc and copper toxicity in peanut, soybean, rice, and corn in soil mixtures by Borkert, C.M, Cox, F.R, Tucker, M.R

“…Applications of zinc (Zn) and copper (Cu) at excessive rates may result in phytotoxicity. Experiments were conducted with mixtures of soils that were similar…”
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Predicting increases in extractable phosphorus from fertilizing soils of varying clay content by Cox, F.R

“…The change in extractable P due to fertilization should be quantified for reliable P recommendations, but this effect is dependent on the P buffering capacity…”
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Zinc toxicity in soybean grown at high iron concentration in nutrient solution by Fontes, R.L.F. (DPS-UFV, Vicosa, MG, Brazil.), Cox, F.R

“…Iron (Fe) deficiency in plants may be caused by heavy metal toxicity and is expressed mainly by chlorosis in young leaves. Zinc (Zn) is often the heavy metal…”
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Effects of acidity at high soil zinc, copper, and manganese on peanut, rice, and soybean by Borkert, C.M, Cox, F.R

“…Plant availability of zinc (Zn), copper (Cu), and manganese (Mn) are affected not only by the extractable concentration, but also by soil pH. However, the…”
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Iron deficiency and zinc toxicity in soybean grown in nutrient solution with different levels of sulfur by Fontes, R.L.F. (DPS-UFV, Vicosa, MG, Brazil.), Cox, F.R

“…A typical symptom of iron (Fe) deficiency in plants is yellowing or chlorosis of leaves. Heavy metal toxicity, including that of zinc (Zn), is often also…”
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Calibration of a monganese availability index for soybean soil test data by Mascagni, H.J. Jr, Cox, F.R

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Uncertainty analysis for knowledge-based decision aids: Application to PDSS (phosphorus decision support system) by Chen, G., Yost, R.S., Li, Z.C., Wang, X., Cox, F.R.

“…The uncertainty associated with predictions generated by computer decision support systems is often not quantified. First order uncertainty analysis was…”
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Effect of soil pH and clay content on the zinc soil test interpretation for corn by Lins, I.D.G, Cox, F.R

“…Soil test interpretations are usually improved by considering at least one soil property in addition to the extractable nutrient concentrations. Greenhouse and…”
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Effect of extractant and selected soil properties on predicting the correct phosphorus fertilization of soybean by Lins, I.D.G. (Extensao Rural (EMPAER), Campo Grande-MS, Brazil), Cox, F.R

“…The rate of phosphorus required to maximize soybean [Glycine max (L.) Merr.] yields is dependent on the concentration of extractable P along with other…”
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Zinc-binding peptides as a function of Zn and S in soybeans by Fontes, R.L.F. (North Carolina State Univ., Raleigh, NC (USA). Dept. of Soil Science), Cox, F.R

“…Soybean (Glycine max [L.] Merr. cv. Ransom) plants were grown for two weeks in nutrient solutions at 0.8 and 40 µM Zn and 0.02 and 20 mM S. Zinc toxicity…”
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A zinc soil test calibration based upon Mehlich 3 extractable zinc, pH, and cation exchange capacity by Junus, M.A, Cox, F.R

“…The soil Zn critical level generally decreases as organic matter content increases. Certain other properties, notably cation exchange capacity (CEC) and…”
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Adsorption and extractability of molybdenum in relation to some chemical properties of soil by Karimian, N., Cox, F. R.

“…Development of a practical soil test for molybdenum (Mo) will depend on selection of the proper extractant. To achieve this, more knowledge is needed about Mo…”
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Soil properties affecting the availability of potassium in highly weathered soils by Uribe, E. (North Carolina State Univ., Raleigh, NC), Cox, F.R

“…The interpretation of soil tests for K in highly weathered soils may be improved if the K buffering power is considered in addition to extractable K. This…”
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Optimizing phosphorus fertilization rates for soybeans grown on oxisols and associated entisols by Lins, I.D.G, Cox, F.R, Nicholaides, J.J. III

“…Although soils vary considerably in their P sorption characteristics, this factor is often not considered in a soil test interpretation. One soil property…”
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Residual effect of manganese fertilization by Mascagni, H.J. Jr, Cox, F.R

“…The residual effect of Mn fertilization is not well quantified. This study was initiated to evaluate the change in extractable Mn following an application in…”
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Evaluation of inorganic and organic manganese fertilizer sources by Mascagni, H. J., Cox, F. R.

“…Little detailed information is available on the effectiveness of various inorganic and organic manganese (Mn) fertilizer sources in correcting deficiencies…”
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Research note--In vitro incorporation of 1-14C acetate by blood cells of normal ducks and ducks infected with Plasmodium lophurae by Cox, F.R, Hart, L.T, Dimopoullos, G.T

“…Several investigations have been made, on a qualitative basis, of in vitro incorporation of 1-14C acetate into the lipids of whole blood from normal ducks and…”
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In vitro incorporation of 1-14C [carbon isotopes] acetate by blood cells of normal ducks and ducks infected with Plasmodium lophurae [Fungus diseases] by Cox, F R, Hart, L T, Dimopoullos, G T

“…Several investigations have been made, on a qualitative basis, of in vitro incorporation of 1-14C acetate into the lipids of whole blood from normal ducks and…”
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