Sugarcane Yield Response to Potassium Fertilization as Related to Extractable Soil Potassium on Florida Histosols

2017 ◽  
Vol 109 (5) ◽  
pp. 2243-2252
Author(s):  
J. Mabry McCray ◽  
Shangning Ji ◽  
Gerald Powell
Keyword(s):  
Yield Response ◽  
Soil Potassium ◽  
Potassium Fertilization ◽  
Sugarcane Yield ◽  
Extractable Soil

ASSESSMENT OF AVAILABLE SOIL SULPHUR IN AN 35S GROWTH CHAMBER EXPERIMENT

1974 ◽  
Vol 54 (3) ◽  
pp. 309-315 ◽  
Author(s):  
J. R. BETTANY ◽  
J. W. B. STEWART ◽  
E. H. HALSTEAD
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
Growth Chamber ◽  
Yield Response ◽  
Laboratory Studies ◽  
Organic S ◽  
Chamber Experiment ◽  
Extractable Soil

Growth chamber and laboratory studies of four selected soils differing in C:N:S ratios and the percentage of total S present as HI-reducible S in the soil organic matter showed that: (1) the yield response of alfalfa to applied S occurred when the 0.01 M CaCl2-extractable soil SO4—S was less than 3.3 μg/g, (2) mineralization of soil organic S was unaffected by the addition of 25 μg S/g to the soils, and (3) the amount of S mineralized was not directly related to the quantity of total S, HI-S or the percentage of total S present as Hi-reducible S. It was noted that the largest amount of S mineralized occurred from the soil with the lowest C:N:S ratios.

Sugarcane yield response to calcium silicate on Florida mineral soils

2018 ◽  
Vol 41 (19) ◽  
pp. 2413-2424 ◽  
Author(s):  
J. Mabry McCray ◽  
Shangning Ji
Keyword(s):  
Calcium Silicate ◽  
Yield Response ◽  
Sugarcane Yield ◽  
Mineral Soils

RELEASE OF NON-EXCHANGEABLE SOIL POTASSIUM BY RESIN-EQUILIBRATION AND ITS SIGNIFICANCE FOR CROP GROWTH

1962 ◽  
Vol 42 (2) ◽  
pp. 266-272 ◽  
Author(s):  
T. E. Barber ◽  
B. C. Matthews
Keyword(s):  
Linear Regression ◽  
Ammonium Acetate ◽  
Cation Exchange Resin ◽  
Yield Response ◽  
Exchangeable Potassium ◽  
Quadratic Regression ◽  
Potassium Fertilizer ◽  
Crop Response ◽  
Soil Potassium ◽  
The Difference

The non-exchangeable potassium released by soil after equilibration with cation-exchange resin was determined by extraction of the mixture with neutral ammonium acetate at room temperature and compared with a similar extraction in the absence of resin. The difference obtained following a 2-day equilibration period was called moderately-available potassium.Simple linear regression of yield on exchangeable potassium or exchangeable plus moderately-available potassium accounted for only 16 and 27 per cent respectively of the variability in yield response of corn, wheat, oats and potatoes to potassium fertilizer in the field. Multiple linear regression of yield on exchangeable and moderately-available potassium accounted for an average of 37 per cent of the variation in crop response; but a multiple quadratic regression of Log (100-per cent yield) on exchangeable and moderately-available potassium accounted for an average of 56 per cent of the variability in Log (100-per cent yield). Multiple quadratic regression of absolute yield or per cent yield on exchangeable and moderately-available potassium accounted for 46 and 50 per cent, respectively, of the variability in crop response to potassium fertilizer.

scholarly journals Sugarcane Yield Response to Furrow-Applied Organic Amendments on Sand Soils

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
J. Mabry McCray ◽  
Shangning Ji ◽  
Leslie E. Baucum
Keyword(s):  
Organic Matter ◽  
Root Zone ◽  
Organic Amendments ◽  
Yield Response ◽  
Entire Volume ◽  
Yard Waste ◽  
Broadcast Application ◽  
Sugarcane Yield ◽  
Significant Yield ◽  
Yield Responses

Organic amendments have been shown to increase sugarcane yield on sand soils in Florida. These soils have very low water and nutrient-holding capacities because of the low content of organic matter, silt, and clay. Because of high costs associated with broadcast application, this field study was conducted to determine sugarcane yield response to furrow application of two organic amendments on sand soils. One experiment compared broadcast application (226 m3 ha−1) of mill mud and yard waste compost, furrow application (14, 28, and 56 m3 ha−1) of these materials, and no amendment. Another experiment compared furrow applications (28 and 56 m3 ha−1) of mill mud and yard waste compost with no amendment. There were significant yield (t sucrose ha−1) responses to broadcast and furrow-applied mill mud but responses to furrow applications were not consistent across sites. There were no significant yield responses to yard waste compost suggesting that higher rates or repeated applications of this amendment will be required to achieve results comparable to mill mud. Results also suggest that enhancing water and nutrient availability in the entire volume of the root zone with broadcast incorporation of organic amendments is the more effective approach for low organic matter sands.

Selecting cotton yield response function to estimate profit-maximizing potassium fertilization rates for cotton production in Tennessee

2017 ◽  
Vol 40 (11) ◽  
pp. 1547-1556
Author(s):  
Xavier Harmon ◽  
Christopher N. Boyer ◽  
C. Owen Gwathmey ◽  
James A. Larson ◽  
Roland K. Roberts
Keyword(s):  
Response Function ◽  
Yield Response ◽  
Cotton Yield ◽  
Cotton Production ◽  
Fertilization Rates ◽  
Potassium Fertilization ◽  
Profit Maximizing

Impacts of long-term lack of potassium fertilization on different forms of soil potassium and crop yields on the North China Plains

2017 ◽  
Vol 17 (6) ◽  
pp. 1607-1617 ◽  
Author(s):  
Jiangye Li ◽  
Lingan Niu ◽  
Qichun Zhang ◽  
Hongjie Di ◽  
Jinmin Hao
Keyword(s):  
North China ◽  
Crop Yields ◽  
Soil Potassium ◽  
The North ◽  
Potassium Fertilization
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