Potassium fertilization of cotton on two high testing soils under two tillage systems

Howard, Donald D.; Gwathmey, C. Owen; Roberts, Roland K.; Lessman, G. M.

doi:10.1080/01904169709365364

Cited by 4 publications

(3 citation statements)

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“…The mean total lint yield difference of 53 kg ha-1 (not significant at P :5 0.05) between the foliar Ca(N0 3 ) 2 and the nonfertilized check is similar to the mean yield difference between the three non-N foliar K sources and KN0 3 (51 kg ha-1 ). In other studies, lint yields were increased with foliar N applications to cotton produced on two soils having high levels of Mehlich-1 extractable K (Howard et al, 1997).…”

Section: Potassium Source Studymentioning

confidence: 86%

“…Tillage system may also contribute to the response to K fertilization. Howard et al (1997) reported that no-tillage cotton yields were increased by applying K to a soil having 225 kg Mehlich-1 extractable K ha-1 , but conventional-till yields were not increased by applying K to a soil having 193 kg extractable K ha- 1 • The foliar-applied K source may also affect yield response to foliar fertilization. Miley and Oosterhuis (1994) summarized three years of evaluating KN0 3 , K2S04, KzSz0 3 , KCI, and K 2 C0 3 as foliar K sources and reported that KN0 3 increased lint yields, relative to the other sources, in two of the three years.…”

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confidence: 99%

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Foliar Feeding of Cotton: Evaluating Potassium Sources, Potassium Solution Buffering, and Boron

Howard¹,

Gwathmey²,

Sams

1998

Agronomy Journal

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on soils having Mehlich-1 extractable K of 177 kg ha Ϫ1 or less. Yield response to foliar K continued through Foliar applications of K may be used to supplement soil applications two years of soil-applied 112 kg K ha Ϫ1 plus two years to maximize yields of cotton (Gossypium hirsutum L.). Response to foliar K applications may be improved by choice of K source, buffering of foliar-applied K (four applications per year at 4.1 kg the spray solution, or applying K with B. Research was conducted ha Ϫ1 each). Oosterhuis (1993) indicated that responses on a Collins silt loam (coarse-silty, mixed, acid, thermic Aquic Udifluto foliar K can probably be expected when Mehlich-3 vents) and on a Memphis silt loam (fine-silty, mixed, active, thermic soil K level is 308 kg K ha Ϫ1 or lower. This extractable Typic Hapludalfs) to evaluate KNO 3 , K 2 SO 4 , K 2 S 2 O 3 , and KCl as K K level is similar to the 177 level reported above, using sources. A second study evaluated foliar KNO 3 and K 2 SO 4 solutions Mehlich-1 extractant, since Mehlich 3 extracts approxiapplied unbuffered and buffered to pH 6 and 4 on cotton K nutrition mately 1.5 times more K than Mehlich 1 (H.G. Savoy, and yield. Foliar K in both studies was applied at 4.1 kg K ha Ϫ1 per personal communication, 1998). Tillage system may also application. A third study evaluated combinations of soil-applied and contribute to the response to K fertilization. Howard foliar-applied B and K. Foliar treatments were applied in 93.5 L ha Ϫ1 et al. (1997) reported that no-tillage cotton yields were water at early flower or 2 wk after and repeated on a 9-to 14-d interval between the four applications. Yields from the four K sources increased by applying K to a soil having 225 kg Mehaveraged 10% higher than the untreated check and yields with KNO 3 lich-1 extractable K ha Ϫ1 , but conventional-till yields were 4% higher than the other K sources. Buffering two K source were not increased by applying K to a soil having 193 solutions to pH 4 resulted in 10% higher yields than the check or kg extractable K ha Ϫ1. unbuffered K solutions. Adding a surfactant (ethoxylated alkyl aryl The foliar-applied K source may also affect yield rephosphate esters) to KNO 3 resulted in 5% higher yields then the sponse to foliar fertilization. Miley and Oosterhuis check. Compared with untreated check yields, soil-applied B at 0.56 (1994) summarized three years of evaluating KNO 3 , kg B ha Ϫ1 increased yields by 6%, four foliar applications of 0.11 kg K 2 SO 4 , K 2 S 2 O 3 , KCl, and K 2 CO 3 as foliar K sources and B ha Ϫ1 increased yields by 8%, and four foliar applications of 0.11 reported that KNO 3 increased lint yields, relative to the kg B plus 4.1 kg K ha Ϫ1 increased yields by 13%. Foliar K solution other sources, in two of the three years. Mullins and buffering and/or the inclusion of foliar B are relatively inexpensive ways of improving yield response. Based on yield increases in this Burmester (1995) reported that lint yields were instudy, these treatments should return 8 to 10 times the pr...

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Section: Potassium Source Studymentioning

confidence: 86%

mentioning

confidence: 99%

Foliar Feeding of Cotton: Evaluating Potassium Sources, Potassium Solution Buffering, and Boron

Howard¹,

Gwathmey²,

Sams

1998

Agronomy Journal

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show abstract

“…Though K interactions may be due to particular genotypic characteristics or environmental adaptations (Pettigrew et al, 1996), it is also important to consider the tillage system used in planting. Howard et al (1997) compared ‘DP50’ response to K fertilization in conventional and no‐tilled soils with high extractable K. They obtained significant yield response to broadcast K fertilizer in more site‐years with no tillage than with conventional tillage, but a higher K rate was required to elicit a yield response with no tillage. They speculated that K uptake efficiency may have been impaired by the lack of incorporation with no tillage.…”

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confidence: 99%

Potassium Effects on Partitioning, Yield, and Earliness of Contrasting Cotton Cultivars

Clement-Bailey

Gwathmey

2007

Agronomy Journal

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Potassium nutrition requirements may differ in cotton (Gossypium hirsutum L.) cultivars that contrast in maturity and growth habit. Our objectives were to determine the effects of K fertility on carbohydrate and biomass partitioning, earliness, and lint yields of two contrasting cultivars. Fertilizer rates of 56 and 112 kg K ha 21 yr 21 , representing 13 and 23 recommended K rates, were applied to long-term K fertility plots on a no-tilled Loring silt loam (thermic Oxyaquic Fragiudalf) in Jackson, TN. Plant samples were harvested at early bloom and cutout, to evaluate carbohydrate and dry matter partitioning during boll filling. Earliness was determined as the percentage of total yield at the first of two harvests. The more determinate cultivar, 'Paymaster PM1218 BG/RR', had higher aboveground dry weight, main stem starch concentrations and percentage first harvest, representing earlier maturity than the more indeterminate 'Deltapine DP555 BG/RR'. The 23 K rate delayed maturity relative to the 13 rate, reflected in biomass partitioning and lint yield distribution. Lint yields were lower at the 13 than at the 23 K in the more determinate cultivar, but K did not affect the indeterminate yields. The two cultivars had equivalent lint yields at the 23 K rate, but the indeterminate cultivar produced more vegetative biomass, further delaying its maturity. Results suggest that an earlier, more determinate cultivar may require more K fertilization for optimal yield response with no tillage.

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A global dataset for crop production under conventional tillage and no tillage systems

Gabrielle

Makowski

2021

Sci Data

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No tillage (NT) is often presented as a means to grow crops with positive environmental externalities, such as enhanced carbon sequestration, improved soil quality, reduced soil erosion, and increased biodiversity. However, whether NT systems are as productive as those relying on conventional tillage (CT) is a controversial issue, fraught by a high variability over time and space. Here, we expand existing datasets to include the results of the most recent field experiments, and we produce a global dataset comparing the crop yields obtained under CT and NT systems. In addition to crop yield, our dataset also reports information on crop growing season, management practices, soil characteristics and key climate parameters throughout the experimental year. The final dataset contains 4403 paired yield observations between 1980 and 2017 for eight major staple crops in 50 countries. This dataset can help to gain insight into the main drivers explaining the variability of the productivity of NT and the consequence of its adoption on crop yields.

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Potassium fertilization of cotton on two high testing soils under two tillage systems

Cited by 4 publications

References 3 publications

Foliar Feeding of Cotton: Evaluating Potassium Sources, Potassium Solution Buffering, and Boron

Foliar Feeding of Cotton: Evaluating Potassium Sources, Potassium Solution Buffering, and Boron

Potassium Effects on Partitioning, Yield, and Earliness of Contrasting Cotton Cultivars

A global dataset for crop production under conventional tillage and no tillage systems

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