Studies with slow release nitrogenous fertilizers on paddy and sorghum

Abstract

In trials with rice, application of 25 kg N/ha as sulphur-coated urea at transplanting plus 25 kg N/ha as ordinary urea as a top-dressing or 100 kg N as ordinary urea/ha in 3 split dressings (50% at transplanting + 50% in 2 equal top-dressings at tillering and panicle-initiation) gave similar paddy yields (4.98-5.03 t/ha). In trials with sorghum, application of 100 kg N/ha as ordinary urea in 2 split dressings or as urea coated with neem (Azadirachta indica) cake in a single dressing at sowing gave similar grain yields

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Claims 2

Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Two nitrogen application regimes gave similar paddy yields of 4.98-5.03 t/ha in rice.

Taxon: riceOryza sativae0
Treatment: application of 25 kg N/ha as sulphur-coated urea at transplanting plus 25 kg N/ha as ordinary urea as a top-dressinge0
Outcome: paddy yieldse0
Direction: similare0
Value: 4.98-5.03 t/hae0
Comparator: 100 kg N as ordinary urea/ha in 3 split dressingse0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

*Oryza sativa* · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e0
“In trials with rice, application of 25 kg N/ha as sulphur-coated urea at transplanting plus 25 kg N/ha as ordinary urea as a top-dressing or 100 kg N as ordinary urea/ha in 3 split dressings (50% at transplanting + 50% in 2 equal top-dressings at tillering and panicle-initiation) gave similar paddy yields (4.98-5.03 t/ha)”
✓ located verbatim in the source · abstract, characters 0–323 · show in text ↑

Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Two nitrogen application regimes gave similar sorghum grain yields.

Taxon: sorghumSorghumt0
Treatment: urea coated with neem (Azadirachta indica) cake in a single dressing at sowinge0
Outcome: grain yieldse0
Direction: similare0
Comparator: 100 kg N/ha as ordinary urea in 2 split dressingse0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

*Sorghum* · Taxon · picture of the genus (one of its species)Evelyn Simak · CC BY-SA 2.0 · Wikimedia Commons ↗

Verbatim

e0
“application of 100 kg N/ha as ordinary urea in 2 split dressings or as urea coated with neem (Azadirachta indica) cake in a single dressing at sowing gave similar grain yields”
✓ located verbatim in the source · abstract, characters 349–524 · show in text ↑

t0
“paddy and sorghum”
✓ located verbatim in the source · title, characters 53–70 · show in text ↑

Azadirachta indica · yield · SorghumPositive and negative results

4 papers: 3 positive, 1 negative or no effect

3 reporting no difference from an alternative

positive
ANSE significantly increased grain yield by 17.9% above check.
Efficacy of neem pesticides on whorl larva, stem-borer and panicle insect pests of sorghum in Nigeria · 2010 · compared with check
No difference from an alternative
positive
Neem seed extract 5% gave maximum grain yield of 26.37 q/ha.
Efficacy of Botanicals for the Management of Sorghum Shoot Fly · 2014
No difference from an alternative
positive
Neem seed kernel extract (NSKE) 5 per cent gave the highest incremental cost benefit ratio (1:24.7).
Population dynamics and bio-intensive management of sorghum midge, Contarinia sorghicola (Coquillett) in sorghum under southern Tamil Nadu · 2017 · compared with Neem leaf extract 5 per cent
No difference from an alternative

See all 4 papers →

botanical · yield · SorghumPositive and negative results

24 papers: 22 positive, 2 negative or no effect

1 paper in the same direction as this paper · 22 reporting no difference from an alternative

positive
MLE applications significantly improved sorghum forage yield and total dry matter production compared with untreated seeds.
Improvement of Sorghum Crop through Exogenous Application of Natural Growth-Promoting Substances under a Changing Climate · 2016 · compared with Untreated seeds
No difference from an alternative
positive
Ocimum leaf extracts at 10, 25, 40 and 50% induced phytoalexins in sorghum mesocotyls.
Induction of plant defense responses by Ocimum gratissimum L. (Lamiaceae) leaf extracts · 2009
No difference from an alternative
positive
Extract seed treatment significantly increased yield relative to untreated control.
Tulbaghia violacea L. II: In vivo antifungal properties towards plant pathogens · 2006 · compared with untreated control
No difference from an alternative

20 papers more in this group

See all 24 papers →

nitrogen · yield · SorghumPositive and negative results

290 papers: 264 positive, 26 negative or no effect

25 papers in the same direction as this paper · 264 reporting no difference from an alternative

positive
Nitrogen increased sorghum grain yield 35–64% at Bayero University Kano.
Productivity and Water Use Efficiency of Sorghum [Sorghum bicolor (L.) Moench] Grown under Different Nitrogen Applications in Sudan Savanna Zone, Nigeria · 2018
No difference from an alternative
positive
Nitrogen application increased mean sorghum yield by 230% relative to no N
Sorghum Response to Fertilizer and Nitrogen Use Efficiency in Uganda · 2012 · compared with no N applied
No difference from an alternative
positive
Sweet sorghum yields increased up to 100 kg N ha-1 of nitrogen.
Production of sweet sorghum (Sorghum bicolorL. Moench) increases with increased plant densities and nitrogen fertilizer levels · 2005
No difference from an alternative

286 papers more in this group

See all 290 papers →

transplanting · yield · Oryza sativa (rice)Positive and negative results

1,078 papers: 922 positive, 156 negative or no effect

155 papers in the same direction as this paper · 922 reporting no difference from an alternative

positive
Rice yield under T1 and T2 was highest at 7.81–8.10 Mg ha −1.
Tillage and Crop Establishment Affects Sustainability of South Asian Rice–Wheat System · 2011
No difference from an alternative
positive
ZT direct-seeded rice yielded similarly to or above puddled transplanted rice in the first three years.
Can productivity and profitability be enhanced in intensively managed cereal systems while reducing the environmental footprint of production? Assessing sustainable intensification options in the breadbasket of India · 2017 · compared with PTR
No difference from an alternative
positive
DDSR yielded 13–18% more than TPR in both years.
Growth, yield and water productivity of dry direct seeded rice and transplanted aromatic rice under different irrigation management regimes · 2020 · compared with TPR
No difference from an alternative

1,074 papers more in this group

See all 1,078 papers →

nitrogen · yield · Oryza sativa (rice)Positive and negative results

2,045 papers: 1,803 positive, 242 negative or no effect

241 papers in the same direction as this paper · 1,803 reporting no difference from an alternative

positive
SPAD-triggered 90 kg N ha −1 produced rice yields equivalent to the 120 kg N ha −1 split application.
Chlorophyll Meter– and Leaf Color Chart–Based Nitrogen Management for Rice and Wheat in Northwestern India · 2002 · compared with 120 kg N ha −1 applied in three splits
No difference from an alternative
positive
Increasing nitrogen rate raised yield and yield components quadratically.
YIELD AND YIELD COMPONENTS OF UPLAND RICE AS INFLUENCED BY NITROGEN SOURCES · 2011
No difference from an alternative
positive
CRU at 200 kg N ha −1 produced 3 to 5.9% more grain than urea at 300 kg N ha −1.
Controlled Release Urea Improved Nitrogen Use Efficiency, Activities of Leaf Enzymes, and Rice Yield · 2012 · compared with urea at 300 kg N ha −1
No difference from an alternative

2,041 papers more in this group

See all 2,045 papers →

fertilization · yield · Oryza sativa (rice)Positive and negative results

3,455 papers: 3,183 positive, 272 negative or no effect

271 papers in the same direction as this paper · 3,183 reporting no difference from an alternative

positive
Integrated FYM and GM generally gave equal or higher rice yields than other GM treatments.
Long‐Term Effects of Organic Inputs on Yield and Soil Fertility in the Rice–Wheat Rotation · 2004 · compared with other GM based treatments
No difference from an alternative
positive
NPK increased rice yield 19-41% over PK across sites.
Effects of fertilization on crop production and nutrient-supplying capacity under rice-oilseed rape rotation system · 2017 · compared with PK fertilization
No difference from an alternative
positive
Both composts increased aboveground biomass and grain yield.
Composted Cattle Manure Increases Microbial Activity and Soil Fertility More Than Composted Swine Manure in a Submerged Rice Paddy · 2017
No difference from an alternative

3,451 papers more in this group

See all 3,455 papers →

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.