Abstract
ABSTRACT Nitrogen (N), phosphorus (P), and potassium (K) nutrient status of two winter wheat cultivars (Kobra and Juma) in the organic crop production system was compared with integrated and conventional systems. This research was conducted between 1998 and 2000 at the Experimental Station in Osiny (Lublin province, Poland) on a grey-brown podzolic soil. To determine N, P, and K contents shoot samples of wheat were taken at the shooting and earing growth stages. Measurements of chlorophyll content were performed with a chlorophyll meter (SPAD) to estimate N nutrient status. Four different methods [Nitrogen Nutrient Index (NNI), Soil Plant Analysis Development (SPAD), Diagnostic Recommendation Integrated System (DRIS), and Sufficiency Range (SR)] of nutrient status evaluation were compared. Nitrogen (N) and potassium (K) nutrient status of wheat cultivated in the organic system was lower compared with the other farming systems. Assuring sufficient supply of nitrogen to cereals under the conditions of organic farming is particularly difficult in early growth stages. In the integrated and conventional systems wheat was sufficiently supplied with NPK. Kobra cv. proved to be more adapted to the organic system. Results indicate that classical nutrient status indices are of lesser use for organic farming.
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Claims 5
Claim · model-written summary
Nitrogen and potassium nutrient status of wheat in the organic system was lower than in the other farming systems.
- Taxon
- wheat
Triticum aestivume1 - Treatment
- organic systeme1
- Outcome
- Nitrogen (N) and potassium (K) nutrient statuse1
- Direction
- lowere1
- Comparator
- the other farming systemse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Nitrogen (N) and potassium (K) nutrient status of wheat cultivated in the organic system was lower compared with the other farming systems”
Claim · model-written summary
Wheat in the integrated and conventional systems was sufficiently supplied with NPK.
- Taxon
- wheatTriticum aestivume2
- Outcome
- sufficiently supplied with NPKe2
- Setting
- integrated and conventional systemse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“In the integrated and conventional systems wheat was sufficiently supplied with NPK”
Claim · model-written summary
Sufficient nitrogen supply to cereals under organic farming is particularly difficult in early growth stages.
Verbatim
e3“Assuring sufficient supply of nitrogen to cereals under the conditions of organic farming is particularly difficult in early growth stages”
Claim · model-written summary
Kobra cultivar was more adapted to the organic system.
- Taxon
- winter wheatTriticum aestivume0
- Material
- Kobrae4
- Treatment
- organic systeme4
- Outcome
- adapted to the organic systeme4
- Direction
- more adaptede4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen (N), phosphorus (P), and potassium (K) nutrient status of two winter wheat cultivars (Kobra and Juma) in the organic crop production system was compared with integrated and conventional systems”
e4“Kobra cv. proved to be more adapted to the organic system”
Claim · model-written summary
The authors conclude that classical nutrient status indices are of lesser use for organic farming.
- Taxon
- winter wheatTriticum aestivume0
- Outcome
- classical nutrient status indicese5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen (N), phosphorus (P), and potassium (K) nutrient status of two winter wheat cultivars (Kobra and Juma) in the organic crop production system was compared with integrated and conventional systems”
e5“Results indicate that classical nutrient status indices are of lesser use for organic farming”
The same questions in other papers
cultivation system · nutrient: content · Triticum aestivum (wheat)Positive and negative results
6 papers in the same direction as this paper · 20 in the opposite direction
- positive
- positive
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See all 27 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.