Use of Soil Nitrate Tests for Cotton Nitrogen Recommendations - An Extension Viewpoint

Miley, Woody N.; Maples, R.; Keisling, T. C.

doi:10.2134/1990.nitrogennutritionofcotton.c9

Cited by 2 publications

(2 citation statements)

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“…One of the issues with soil analysis is it only provides the overall nutrient content present in the soil (Houba et al, 1996); however, it does not provide information on the plant available nutrients due to different nutrients existing in different forms and availability to the plant. For example, total nitrogen is commonly measured in soil analysis; whereas only a small portion of total nitrogen, mainly nitrate is available for plants (Miley, Maples & Keisling, 1990). Moreover, this nutrient monitoring method requires time-consuming and expensive laboratory analysis.…”

Section: Introductionmentioning

confidence: 99%

Rapid and cost-effective nutrient content analysis of cotton leaves using near-infrared spectroscopy (NIRS)

Prananto

Minasny

Weaver

2021

PeerJ

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The development of portable near-infrared spectroscopy (NIRS) combined with smartphone cloud-based chemometrics has increased the power of these devices to provide real-time in-situ crop nutrient analysis. This capability provides the opportunity to address nutrient deficiencies early to optimise yield. The agriculture sector currently relies on results delivered via laboratory analysis. This involves the collection and preparation of leaf or soil samples during the growing season that are time-consuming and costly. This delays farmers from addressing deficiencies by several weeks which impacts yield potential; hence, requires a faster solution. This study evaluated the feasibility of using NIRS in estimating different macro- and micronutrients in cotton leaf tissues, assessing the accuracy of a portable handheld NIR spectrometer (wavelength range of 1,350–2,500 nm). This study first evaluated the ability of NIRS to predict leaf nutrient levels using dried and ground cotton leaf samples. The results showed the high accuracy of NIRS in predicting essential macronutrients (0.76 ≤ R2 ≤ 0.98 for N, P, K, Ca, Mg and S) and most micronutrients (0.64 ≤ R2 ≤ 0.81 for Fe, Mn, Cu, Mo, B, Cl and Na). The results showed that the handheld NIR spectrometer is a practical option to accurately measure leaf nutrient concentrations. This research then assessed the possibility of applying NIRS on fresh leaves for potential in-field applications. NIRS was more accurate in estimating cotton leaf nutrients when applied on dried and ground leaf samples. However, the application of NIRS on fresh leaves was still quite accurate. Using fresh leaves, the prediction accuracy was reduced by 19% for macronutrients and 11% for micronutrients, compared to dried and ground samples. This study provides further evidence on the efficacy of using NIRS for field estimations of cotton nutrients in combination with a nutrient decision support tool, with an accuracy of 87.3% for macronutrients and 86.6% for micronutrients. This application would allow farmers to manage nutrients proactively to avoid yield penalties or environmental impacts.

show abstract

Section: Introductionmentioning

confidence: 99%

Rapid and cost-effective nutrient content analysis of cotton leaves using near-infrared spectroscopy (NIRS)

Prananto

Minasny

Weaver

2021

PeerJ

View full text Add to dashboard Cite

show abstract

“…One of the issues with soil analysis is it only provides the overall nutrient content present in the soil (Houba et al, 1996); however, it does not provide information on the plant available nutrients due to different nutrients existing in different forms and availability to the plant. For example, total nitrogen is commonly measured in soil analysis; whereas only a small portion of total nitrogen, mainly nitrate is available for plants (Miley et al, 1990). Moreover, this nutrient monitoring method requires time-consuming and expensive laboratory analysis.…”

Section: Introductionmentioning

confidence: 99%

Peer Review #1 of "Rapid and cost-effective nutrient content analysis of cotton leaves using near-infrared spectroscopy (NIRS) (v0.1)"

2021

View full text Add to dashboard Cite

The development of portable near-infrared spectroscopy (NIRS) combined with smartphone cloud-based chemometrics has increased the power of these devices to provide real-time in-situ crop nutrient analysis. This capability provides the opportunity to address nutrient deficiencies early to optimise yield. The agriculture sector currently relies on results delivered via laboratory analysis. This involves the collection and preparation of leaf or soil samples during the growing season that are time-consuming and costly. This delays farmers from addressing deficiencies by several weeks which impacts yield potential; hence, requires a faster solution. This study evaluated the feasibility of using NIRS in estimating different macro-and micronutrients in cotton leaf tissues, assessing the accuracy of a portable handheld NIR spectrometer (wavelength range of 1350-2500 nm).This study first evaluated the ability of NIRS to predict leaf nutrient levels using dried and ground cotton leaf samples. The results showed the high accuracy of NIRS in predicting essential macronutrients (0.76 ≤ R 2 ≤ 0.98 for N, P, K, Ca, Mg, and S) and most micronutrients (0.64 ≤ R 2 ≤ 0.81 for Fe, Mn, Cu, Mo, B, Cl, and Na). The results showed that the handheld NIR spectrometer is a practical option to accurately measure leaf nutrient concentrations. This research then assessed the possibility of applying NIRS on fresh leaves for potential in-field applications. NIRS was more accurate in estimating cotton leaf nutrients when applied on dried and ground leaf samples. However, the application of NIRS on fresh leaves was still quite accurate. Using fresh leaves, the prediction accuracy was reduced by 19% for macronutrients and 11% for micronutrients, compared to dried and ground samples. This study provides further evidence on the efficacy of using NIRS for field estimations of cotton nutrients in combination with a nutrient decision support tool, with an accuracy of 87.3% for macronutrients and 86.6% for micronutrients. This application would allow farmers to manage nutrients proactively to avoid yield penalties or environmental impacts.

show abstract

Use of Soil Nitrate Tests for Cotton Nitrogen Recommendations - An Extension Viewpoint

Cited by 2 publications

References 4 publications

Rapid and cost-effective nutrient content analysis of cotton leaves using near-infrared spectroscopy (NIRS)

Rapid and cost-effective nutrient content analysis of cotton leaves using near-infrared spectroscopy (NIRS)

Peer Review #1 of "Rapid and cost-effective nutrient content analysis of cotton leaves using near-infrared spectroscopy (NIRS) (v0.1)"

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