Abstract
An incubation experiment was carried out to know if any of the applied plant nutrients, viz., P, K, S, Zn, Cu, Mn and B react (fix or complex) abnormally with the experimental soil. On the basis of critical level of nutrient in the soil and nutrient sorption curves, an Optimum Nutrient Treatment (ONT) consisting of P, K and Zn besides N, which are deficient in the soil, was formulated for the experimental soil. The evolved ONT was tested by means of a green house nutrient survey experiment with sorghum (Co 27) as the test crop. These results confirmed that the exclusion of N, P, K and Zn significantly reduced the dry matter yield. But the addition of other nutrients like Ca, Mg, S, Cu, Fe, Mn, Mo and B did not significantly influence the dry matter yield. A field experiment was conducted to evolve the fertilizer optima for rice with a treatment structure developed based on the ONT. Short duration rice (ADT 36) was grown during Kuruvai season (June-September, 1999) and medium duration rice (Co 43) during thaladi season (October, 1999- January, 2000). From a fit of the grain yield data on a quadratic polynomial surface, the optimum amounts of nutrients which ensures balanced fertilization were evolved. The results revealed that 175, 54, 50 and 30 kg ha for ADT 36 rice and 165, 63, 65 and 30 kg ha" for Co 43 rice, respectively of N, P,O,,K,O and ZnSO, 7H,O ha¹ were the optimum doses of nutrients in this soil. Economics of balanced fertilization through this systematic approach was compared with the blanket fertilizer recommendation by test verification in the field. The results revealed that the rice yield as well as profit were higher with balanced fertilization by systematic approach as compared to the blanket fertilizer recommendation
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Claims 6
Claim · model-written summary
Excluding N, P, K and Zn significantly reduced sorghum dry matter yield.
- Material
- Co 27e0
- Treatment
- exclusion of N, P, K and Zne1
- Outcome
- dry matter yielde1
- Direction
- reducede1
- Setting
- green housee0
SorghumNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“green house nutrient survey experiment with sorghum (Co 27) as the test crop”
e1“These results confirmed that the exclusion of N, P, K and Zn significantly reduced the dry matter yield”
Claim · model-written summary
Adding Ca, Mg, S, Cu, Fe, Mn, Mo and B did not significantly influence sorghum dry matter yield.
- Material
- Co 27e0
- Treatment
- addition of other nutrients like Ca, Mg, S, Cu, Fe, Mn, Mo and Be2
- Outcome
- dry matter yielde2
- Direction
- no_changeinferrede2
- Setting
- green housee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“green house nutrient survey experiment with sorghum (Co 27) as the test crop”
e2“But the addition of other nutrients like Ca, Mg, S, Cu, Fe, Mn, Mo and B did not significantly influence the dry matter yield”
Claim · model-written summary
The optimum doses for ADT 36 rice were 175, 54, 50 and 30 kg ha.
- Taxon
- rice
Oryza sativae3 - Material
- ADT 36e3
- Outcome
- optimum doses of nutrientse7
- Value
- 175, 54, 50 and 30 kg hae3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“175, 54, 50 and 30 kg ha for ADT 36 rice”
e7“were the optimum doses of nutrients in this soil”
Claim · model-written summary
The optimum doses for Co 43 rice were 165, 63, 65 and 30 kg ha.
- Taxon
- riceOryza sativae4
- Material
- Co 43e4
- Outcome
- optimum doses of nutrientse7
- Value
- 165, 63, 65 and 30 kg hae4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“165, 63, 65 and 30 kg ha" for Co 43 rice”
e7“were the optimum doses of nutrients in this soil”
Claim · model-written summary
Balanced fertilization by the systematic approach gave higher rice yield and profit than the blanket fertilizer recommendation.
- Taxon
- riceOryza sativat0
- Treatment
- balanced fertilization by systematic approache5
- Outcome
- rice yield as well as profite5
- Direction
- highere5
- Comparator
- blanket fertilizer recommendatione5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“for rice”
e5“the rice yield as well as profit were higher with balanced fertilization by systematic approach as compared to the blanket fertilizer recommendation”
Claim · model-written summary
The experimental soil was deficient in P, K and Zn besides N.
- Taxon
- riceOryza sativat0
- Outcome
- P, K and Zn besides Ne6
- Qualifier
- which are deficient in the soile6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“for rice”
e6“P, K and Zn besides N, which are deficient in the soil”
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See all 105 papers →8 of 10 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.