Percent Relative Cumulative Frequency Approach to Determine Micronutrient Deficiencies in Soybean

Hitsuda, Kiyoko; Toriyama, K.; Subbarao, G. V.; Ito, Osamu

doi:10.2136/sssaj2010.0158

Cited by 3 publications

(2 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Micronutrients use in the fertilization program becomes a common practice on farms, but it is important to conduct more studies (Goncalves et al, 2011). There is a need to determine required micronutrient concentrations in soils and plants for soils with likely deficiencies (Hitsuda et al, 2010). Little research focused on seed polymer nutrient coating in soybeans under dryland environments and mostly insufficient rainfall.…”

Section: Ajabsmentioning

confidence: 99%

Effect of Polymer Seed Coating With Micronutrients on Soybeans in Southeastern Coastal Plains

Wiatrak¹

2013

American Journal of Agricultural and Biological Sciences

View full text Add to dashboard Cite

Polymer seed coating with micronutrients may affect soybean (Glycine max (L.) Merr) growth and yields under dryland conditions. The objective of this study was to determine the effect of two seed application rates (265 and 395 mL 100 kg seeds −1 ) of polymer based mixture of Copper (Cu), Manganese (Mn) and Zinc (Zn) micronutrients on dryland soybeans near Blackville, SC from 2011 to 2012. Soybeans were evaluated for plant Normalized Difference Vegetation Index (NDVI), Leaf Area Index (LAI), plant height, seed weight and grain yields. Compared to untreated control, polymer seed coating significantly increased grain yields by 8.1 and 14.0% with seed applications at 265 and 395 mL 100 kg seeds −1 , respectively. Plant NDVI improved by 10.5% with application of polymer seed coating treatment at 395 mL 100 kg seeds −1 . Seed coating at 265 and 395 mL 100 kg seedssignificantly increased plant NDVI by 10.2 and 10.8% at 8 weeks after soybean planting and 4.6 and 4.2% at 12 weeks after planting. Based on significant linear relationships, grain yields increased by 179.2 kg ha −1 with increasing plant NDVI by 0.1 unit at 6 weeks after planting soybeans and 99.4 kg ha −1 with increasing weight by 1 g of 100 seeds. Treatment application did not affect plant NDVI at 4 through 6 and 9 weeks after planting, plant LAI at 8 and 12 weeks after planting and plant height. These results indicate that polymer seed coating may help to improve some growth parameters and grain yields of soybean under dryland conditions in Southeastern Coastal Plains.

show abstract

Section: Ajabsmentioning

confidence: 99%

Effect of Polymer Seed Coating With Micronutrients on Soybeans in Southeastern Coastal Plains

Wiatrak¹

2013

American Journal of Agricultural and Biological Sciences

View full text Add to dashboard Cite

show abstract

“…Micronutrient deficiencies, including copper, have been reported in Brazilian Oxisols [3] [4]. Nearly 70% to 80% of Cerrado Oxsols are deficient in Zn, Cu, or Mn [5].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Tropical Legume Cover Crops for Copper Use Efficiency

Fageria¹,

Baligar²

2014

AJPS

View full text Add to dashboard Cite

Cover crops are important components of cropping systems due to their role in improving soil quality. Lack of adequate levels of soil micronutrients prevents the success of cover crops in highly weathered tropical soils. A greenhouse experiment was conducted with the objective to evaluate copper use efficiency of nine tropical legume cover crops. The copper levels used were 0, 5, 10 and 20 mg Cu kg −1 of soil. Shoot dry weight, maximum root length and root dry weight significantly increased in a quadratic fashion with increasing soil Cu levels in the range of 0 to 20 mg kg −1 soil. Cu x cover crops interactions for shoot dry weight, root dry weight, maximum root length and contribution of root to the total dry weight were significant, indicating different responses of cover crops with the variation in soil Cu levels. Overall, maximum shoot dry weight was obtained with the application of 13 mg Cu kg −1 . Similarly, maximum root dry weight and maximum root length were obtained with the application of 12 and 14 mg Cu kg −1 of soil. Root dry weight and maximum root length were significantly and positively related to shoot dry weight, indicating that a vigorous root system is important for improving productivity of cover crops grown on Brazilian Oxisols, especially where deficiency of micronutrients such as Cu exists. The Cu concentration in the plant tissue decreased in a quadratic fashion whereas, Cu uptake increased with increasing Cu application rate from 0 to 20 mg kg −1 soil. There was a significant variation observed in Cu use efficiency among cover crop species. Increasing applied Cu levels significantly increased soil pH and Mehlich 1 extractable soil Cu, Zn, Mn and Fe concentrations in the soil solution.

show abstract

Postseason Diagnosis of Potassium Deficiency in Soybean Using Seed Potassium Concentration

Parvej

Slaton

Fryer

et al. 2016

Soil Science Soc of Amer J

View full text Add to dashboard Cite

Core Ideas Seed‐K concentrations accounted for 60% of the variation in relative yield of unfertilized soybean for 100 site‐years in North America. The proposed deficient seed‐K concentration (<16.5 g kg−1) identified fields that responded positively to fertilizer K 77% of the time. Seed‐K concentration difference with and without fertilizer K decreased with the increase of soil K. Seed‐K concentrations can help diagnose reasons for low yields and correct K deficiency for subsequent crops. Soybean [Glycine max (L.) Merr.] seed nutrient concentrations may be useful for postseason diagnosis of nutrient deficiencies to identify reasons for lower‐than‐expected yields. Our objective was to determine the relationships between seed‐K and soil‐K concentrations and relative soybean yield and to develop potential seed‐K concentration thresholds for diagnosis of K deficiency as a yield‐limiting factor. Soil‐test K and seed‐K concentrations and yield data were collected from published and unpublished K fertilization research conducted in Arkansas (33 site‐years), Indiana (1 site‐year), Iowa (34 site‐years), Missouri (1 site‐year), Tennessee (6 site‐years), Virginia (1 site‐year), and Canada (24 site‐years). Seed‐K concentrations accounted for 66% of the variation in relative yield of soybean receiving no fertilizer K for Arkansas, 48% for Iowa, 78% for Canada, and 60% for North America from a database that included 100 site‐years. The critical seed‐K concentration ranges were 15.6 to 17.0 g K kg−1 for Arkansas, 17.4 to 20.0 g K kg−1 for Iowa, 14.6 to 16.2 g K kg−1 for Canada, and 16.5 to 17.7 g K kg−1 for North America. Seed‐K concentrations below the lower threshold for North America accurately predicted positive yield responses to fertilizer K at 77% of the sites classified as deficient. The difference between seed‐K concentration of soybean grown with and without fertilizer K decreased linearly as soil‐K concentration increased and plateaued when soil‐K concentration was ≥87, 139, 73, and 104 mg K kg−1 for Arkansas, Iowa, Canada, and North America, respectively. Results suggest that seed‐K concentrations can be used to aid in the diagnosis of K deficiency at maturity.

show abstract

Percent Relative Cumulative Frequency Approach to Determine Micronutrient Deficiencies in Soybean

Cited by 3 publications

References 25 publications

Effect of Polymer Seed Coating With Micronutrients on Soybeans in Southeastern Coastal Plains

Effect of Polymer Seed Coating With Micronutrients on Soybeans in Southeastern Coastal Plains

Evaluation of Tropical Legume Cover Crops for Copper Use Efficiency

Postseason Diagnosis of Potassium Deficiency in Soybean Using Seed Potassium Concentration

Contact Info

Product

Resources

About