Abstract
A field experiment was conducted from July to September 2024 at the Multipurpose crop nursery field of Akenten Appiah-Menka University of Skills Training and Entrepreneurial Development, Mampong Campus, to evaluate the influence of rice husk biochar and inorganic fertilizer on soil properties, growth and yield of lettuce. The experimental design used was a Randomized Complete Block Design (RCBD) with seven treatments and three replications. The treatments were [(i) No fertilizer (control), (ii) 5 t/ha Rice husk biochar (RHB), (iii) 300 kg/ha NPK, (iv) 2.5 t/ha RHB + 150 kg/ha NPK, (v) 2.5 t/ha RHB + 100 kg/ha NPK, (vi) 1.25 t/ha RHB + 150 kg/ha NPK, and (vii) 1.25 t/ha RHB + 100 kg/ha NPK]. The results showed that 5 t/ha RHB and 1.25 t/ha RHB + 150 kg/ha NPK significantly enhanced the soil chemical properties (pH, P, N, K, Ca, Mg, OM and OC contents) as compared to the unamended plot and 300 kg/ha NPK treated soils. Lettuce plants that received 1.25 t/ha RHB + 150 kg/ha NPK and 5 t/ha RHB recorded significantly taller plants and higher number of leaves per plant than plants that received 300 kg/ha NPK from 2 to 5 WAT. The combination of 1.25 t/ha RHB and 150 kg/ha NPK showed significantly wider leaf area, canopy spread, highest shoot development, and overall yield (16.49 t/ha) as compared to the control (7.63 t/ha) and 300 kg/ha NPK (9.52 t/ha) treated soils. It is recommended that for enhanced soil fertility and higher yield, lettuce farmers should apply 1.25 t/ha RHB + 150 kg/ha NPK.
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Claims 7
Claim · model-written summary
Five tonnes per hectare of biochar enhanced soil chemical properties relative to unamended and NPK soils.
- Taxon
- Lettuce
Lactuca sativat0 - Treatment
- 5 t/ha RHBe0
- Outcome
- soil chemical properties (pH, P, N, K, Ca, Mg, OM and OC contents)e0
- Direction
- enhancede0
- Comparator
- the unamended plot and 300 kg/ha NPK treated soilse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“5 t/ha RHB and 1.25 t/ha RHB + 150 kg/ha NPK significantly enhanced the soil chemical properties (pH, P, N, K, Ca, Mg, OM and OC contents) as compared to the unamended plot and 300 kg/ha NPK treated soils.”
t0“Lettuce (Lactuca sativa L.)”
Claim · model-written summary
Combined biochar and NPK enhanced soil chemical properties relative to unamended and NPK soils.
- Taxon
- LettuceLactuca sativat0
- Treatment
- 1.25 t/ha RHB + 150 kg/ha NPKe0
- Outcome
- soil chemical properties (pH, P, N, K, Ca, Mg, OM and OC contents)e0
- Direction
- enhancede0
- Comparator
- the unamended plot and 300 kg/ha NPK treated soilse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“5 t/ha RHB and 1.25 t/ha RHB + 150 kg/ha NPK significantly enhanced the soil chemical properties (pH, P, N, K, Ca, Mg, OM and OC contents) as compared to the unamended plot and 300 kg/ha NPK treated soils.”
t0“Lettuce (Lactuca sativa L.)”
Claim · model-written summary
Combined biochar and NPK produced taller lettuce with more leaves than NPK alone.
- Taxon
- LettuceLactuca sativae0
- Treatment
- 1.25 t/ha RHB + 150 kg/ha NPKe0
- Outcome
- taller plants and higher number of leaves per plante0
- Direction
- highere0
- Qualifier
- from 2 to 5 WATe0
- Comparator
- 300 kg/ha NPKe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lettuce plants that received 1.25 t/ha RHB + 150 kg/ha NPK and 5 t/ha RHB recorded significantly taller plants and higher number of leaves per plant than plants that received 300 kg/ha NPK from 2 to 5 WAT.”
Claim · model-written summary
Biochar alone produced taller lettuce with more leaves than NPK alone.
- Taxon
- LettuceLactuca sativae0
- Treatment
- 5 t/ha RHBe0
- Outcome
- taller plants and higher number of leaves per plante0
- Direction
- highere0
- Qualifier
- from 2 to 5 WATe0
- Comparator
- 300 kg/ha NPKe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lettuce plants that received 1.25 t/ha RHB + 150 kg/ha NPK and 5 t/ha RHB recorded significantly taller plants and higher number of leaves per plant than plants that received 300 kg/ha NPK from 2 to 5 WAT.”
Claim · model-written summary
Combined biochar and NPK increased leaf area, canopy spread and shoot development.
- Taxon
- LettuceLactuca sativat0
- Treatment
- 1.25 t/ha RHB and 150 kg/ha NPKe0
- Outcome
- leaf area, canopy spread, highest shoot developmente0
- Direction
- widere0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The combination of 1.25 t/ha RHB and 150 kg/ha NPK showed significantly wider leaf area, canopy spread, highest shoot development, and overall yield (16.49 t/ha) as compared to the control (7.63 t/ha) and 300 kg/ha NPK (9.52 t/ha) treated soils.”
t0“Lettuce (Lactuca sativa L.)”
Claim · model-written summary
Combined biochar and NPK yielded 16.49 t/ha, above control and NPK alone.
- Taxon
- LettuceLactuca sativat0
- Treatment
- 1.25 t/ha RHB and 150 kg/ha NPKe1
- Outcome
- overall yielde0
- Value
- 16.49 t/hae0
- Qualifier
- 7.63 t/hae0
- Comparator
- the controle0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“overall yield (16.49 t/ha) as compared to the control (7.63 t/ha) and 300 kg/ha NPK (9.52 t/ha) treated soils.”
e1“The combination of 1.25 t/ha RHB and 150 kg/ha NPK”
t0“Lettuce (Lactuca sativa L.)”
Claim · model-written summary
The authors recommend combined biochar and NPK for higher yield and soil fertility.
- Taxon
- lettuceLactuca sativae0
- Outcome
- should apply 1.25 t/ha RHB + 150 kg/ha NPKe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“for enhanced soil fertility and higher yield, lettuce farmers should apply 1.25 t/ha RHB + 150 kg/ha NPK”
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See all 5 papers →8 of 9 groups shown: named compounds and organisms first, then groups whose results differ (checked claim by claim), then those with positive and negative results, then the smaller groups.
Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.