Abstract
Abstract The use of plant tissue analysis as a tool for diagnosing nutrient deficiency has steadily gained interest by producers and crop advisors in Oklahoma. A study was conducted during the 2012–2013 and 2015–2016 growing seasons at two locations near Stillwater and Perry, OK, to evaluate the variability of canola ( Brassica napus L.) nutrient concentrations across various growth stages (STAGE), among several days within each growth stage (DAY), across several times during the day (TIME). Canola tissue samples were collected in the morning, noon, and evening for three consecutive days at rosette, postdormancy break, and prebolting stages. Samples were analyzed for macronutrients (N, P, K) and secondary (S, Ca, Mg) nutrient concentrations. Tissue nutrient concentrations were found to be extremely variable, as affected by main effects and interactions of sampling TIME, DAY, and STAGE. Nutrient concentration generally increased over time, for most nutrients. The analysis did not indicate any definitive pattern of tissue nutrient accumulation based on the fixed effects TIME and DAY. Although, the exact reasons for the different responses are not known, they may be related to soil physical and chemical property differences and variation in weather factors. While this work does not provide insight in the relationship between nutrient concentrations and crop yield, this does bring to light complications with using tissue analysis for management decisions. Further work must be done to investigate the relationships of tissue concentration and yield, and the viability of tissue sampling for nutrient management.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 5
Claim · model-written summary
Canola tissue nutrient concentrations were extremely variable, affected by sampling time, day and growth stage.
- Taxon
- canola
.jpg?width=60)
Brassica napus var. napuse0 - Outcome
- Tissue nutrient concentrationse1
- Qualifier
- extremely variablee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“to evaluate the variability of canola ( Brassica napus L.) nutrient concentrations across various growth stages”
e1“Tissue nutrient concentrations were found to be extremely variable, as affected by main effects and interactions of sampling TIME, DAY, and STAGE”
Claim · model-written summary
Canola nutrient concentration generally increased over time for most nutrients.
- Taxon
- canolaBrassica napus var. napuse0
- Treatment
- over timee2
- Outcome
- Nutrient concentratione2
- Direction
- increasede2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“to evaluate the variability of canola ( Brassica napus L.) nutrient concentrations across various growth stages”
e2“Nutrient concentration generally increased over time, for most nutrients”
Claim · model-written summary
No definitive pattern of tissue nutrient accumulation was found based on the fixed effects of sampling time and day.
- Taxon
- canolaBrassica napus var. napuse0
- Outcome
- any definitive pattern of tissue nutrient accumulatione3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“to evaluate the variability of canola ( Brassica napus L.) nutrient concentrations across various growth stages”
e3“The analysis did not indicate any definitive pattern of tissue nutrient accumulation based on the fixed effects TIME and DAY”
Claim · model-written summary
The different canola tissue responses may be related to soil property differences and weather variation.
- Taxon
- canolaBrassica napus var. napuse0
- Outcome
- different responsese4
- Qualifier
- soil physical and chemical property differences and variation in weather factorse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“to evaluate the variability of canola ( Brassica napus L.) nutrient concentrations across various growth stages”
e4“Although, the exact reasons for the different responses are not known, they may be related to soil physical and chemical property differences and variation in weather factors”
Claim · model-written summary
Further work is needed on the relationship of tissue nutrient concentration and yield before tissue sampling is used for nutrient management.
- Taxon
- canolaBrassica napus var. napuse0
- Outcome
- investigate the relationships of tissue concentration and yielde5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“to evaluate the variability of canola ( Brassica napus L.) nutrient concentrations across various growth stages”
e5“Further work must be done to investigate the relationships of tissue concentration and yield, and the viability of tissue sampling for nutrient management”