Abstract
A field experiment was carried out at CRS Masodha, Faizabad during kharif season of 2012-13 to evaluate the long-term effect of NPK fertilizers on productivity of rice and nutrients availability. The results showed that grain yield, yield attributing characters and nutrients uptake increased with the increasing levels of N, P and K (N 120 P 80 K 40 ). The minimum values were observed at control (unfertilized), which were at par to nitrogen alone (N 120 ) and N 120 K 40 treatment. Nitrogen responded only in presence of phosphorus and vise-versa, while potassium responded along with nitrogen and phosphorus both. The regular application of nitrogen fertilizer (80 and 120 kg/ha) reduced the soil pH but maintain soil available N over a span of 36 years. The regular application of phospatic fertilizer (single super phosphate) @ 80 kg P 2 O 5 /ha increased soil available P by about 3 fold from its initial level in 36 years. A significant increase in available K was also found by regular application of potassium (40 kg K 2 O/ha) over the years. It was concluded that balanced application of N P and K fertilizers is necessary for obtaining higher yields and to maintain soil fertility in long run.
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Claims 12
Claim · model-written summary
Grain yield rose with increasing N, P and K levels.
- Taxon
- rice
Oryza sativae1 - Treatment
- increasing levels of N, P and Ke0
- Outcome
- grain yielde0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“grain yield, yield attributing characters and nutrients uptake increased with the increasing levels of N, P and K (N 120 P 80 K 40 )”
e1“productivity of rice and nutrients availability”
Claim · model-written summary
Yield attributing characters rose with increasing N, P and K levels.
- Taxon
- riceOryza sativae1
- Treatment
- increasing levels of N, P and Ke0
- Outcome
- yield attributing characterse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“grain yield, yield attributing characters and nutrients uptake increased with the increasing levels of N, P and K (N 120 P 80 K 40 )”
e1“productivity of rice and nutrients availability”
Claim · model-written summary
Nutrient uptake rose with increasing N, P and K levels.
- Taxon
- riceOryza sativae1
- Treatment
- increasing levels of N, P and Ke0
- Outcome
- nutrients uptakee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“grain yield, yield attributing characters and nutrients uptake increased with the increasing levels of N, P and K (N 120 P 80 K 40 )”
e1“productivity of rice and nutrients availability”
Claim · model-written summary
The unfertilized control had minimum values, comparable to nitrogen alone and N plus K.
- Taxon
- riceOryza sativae1
- Outcome
- minimum valuese0
- Direction
- minimume0
- Comparator
- nitrogen alone (N 120 ) and N 120 K 40 treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The minimum values were observed at control (unfertilized), which were at par to nitrogen alone (N 120 ) and N 120 K 40 treatment.”
e1“productivity of rice and nutrients availability”
Claim · model-written summary
Nitrogen responded only with phosphorus present.
- Taxon
- riceOryza sativae1
- Treatment
- phosphoruse0
- Outcome
- Nitrogen respondede0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen responded only in presence of phosphorus and vise-versa”
e1“productivity of rice and nutrients availability”
Claim · model-written summary
Phosphorus responded only with nitrogen present.
- Taxon
- riceOryza sativae1
- Treatment
- Nitrogene0
- Outcome
- phosphoruse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen responded only in presence of phosphorus and vise-versa”
e1“productivity of rice and nutrients availability”
Claim · model-written summary
Potassium responded alongside nitrogen and phosphorus.
- Taxon
- riceOryza sativae1
- Treatment
- nitrogen and phosphoruse0
- Outcome
- potassium respondede0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“potassium responded along with nitrogen and phosphorus both”
e1“productivity of rice and nutrients availability”
Claim · model-written summary
Regular nitrogen fertilization lowered soil pH.
- Taxon
- riceOryza sativae1
- Treatment
- nitrogen fertilizer (80 and 120 kg/ha)e0
- Outcome
- soil pHe0
- Direction
- reducede0
- Qualifier
- over a span of 36 yearse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The regular application of nitrogen fertilizer (80 and 120 kg/ha) reduced the soil pH but maintain soil available N over a span of 36 years.”
e1“productivity of rice and nutrients availability”
Claim · model-written summary
Regular nitrogen fertilization maintained available soil nitrogen over 36 years.
- Taxon
- riceOryza sativae1
- Treatment
- nitrogen fertilizer (80 and 120 kg/ha)e0
- Outcome
- soil available Ne0
- Direction
- maintaine0
- Qualifier
- over a span of 36 yearse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The regular application of nitrogen fertilizer (80 and 120 kg/ha) reduced the soil pH but maintain soil available N over a span of 36 years.”
e1“productivity of rice and nutrients availability”
Claim · model-written summary
Regular phosphate fertilizer raised available soil P about threefold over 36 years.
- Taxon
- riceOryza sativae1
- Treatment
- phospatic fertilizer (single super phosphate) @ 80 kg P 2 O 5 /hae0
- Outcome
- soil available Pe0
- Direction
- increasede0
- Value
- about 3 folde0
- Comparator
- its initial levele0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The regular application of phospatic fertilizer (single super phosphate) @ 80 kg P 2 O 5 /ha increased soil available P by about 3 fold from its initial level in 36 years.”
e1“productivity of rice and nutrients availability”
Claim · model-written summary
Regular potassium fertilizer significantly raised available soil K.
- Taxon
- riceOryza sativae1
- Treatment
- potassium (40 kg K 2 O/ha)e0
- Outcome
- available Ke0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A significant increase in available K was also found by regular application of potassium (40 kg K 2 O/ha) over the years.”
e1“productivity of rice and nutrients availability”
Claim · model-written summary
The authors recommend balanced N, P and K to sustain higher yield and soil fertility.
- Taxon
- riceOryza sativae1
- Outcome
- balanced application of N P and K fertilizerse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“balanced application of N P and K fertilizers is necessary for obtaining higher yields and to maintain soil fertility in long run”
e1“productivity of rice and nutrients availability”
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See all 475 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.