Abstract
Carrots were grown annually from 1954 to 1962 in a rotation of vegetable crops in a long-term factorial manurial experiment. The experimental treatments were applied to the same plots before each crop so that possible cumulative effects of the treatments could be measured.Farmyard manure (FYM), at 20 tons per acre per crop, gave consistently higher yields than fertilizers alone and the increases were greater in dry years than in wet. The difference in yield between the manured plots and the fertilizer-treated plots did not increase consistently after 1959, thus indicating that a saturation level of the factors causing the yield increases had been reached.In the presence of FYM, applications of N, P and K fertilizers had only small effects on carrot yields. In the absence of FYM, more than 31 lb. per acre N as Nitrochalk depressed yields, whereas both phosphate and potash fertilizers increased them.Plants from the FYM plots contained about twice as much potassium and about 30% more phosphorus than those from the fertilizer-only plots. These differences are discussed in relation to the increased yields on the FYM plots and to the effects of the fertilizers alone on the yield and composition of the plants.
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Claims 10
Claim · model-written summary
Farmyard manure at 20 tons per acre per crop gave consistently higher carrot yields than fertilizers alone.
- Taxon
- Carrots
Daucus carotat0 - Treatment
- Farmyard manure (FYM), at 20 tons per acre per crope0
- Outcome
- yieldse0
- Direction
- highere0
- Comparator
- fertilizers alonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Farmyard manure (FYM), at 20 tons per acre per crop, gave consistently higher yields than fertilizers alone”
t0“Carrots”
Claim · model-written summary
The yield increases from farmyard manure were greater in dry years than in wet years.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the increases were greater in dry years than in wet”
t0“Carrots”
Claim · model-written summary
The yield difference between manured plots and fertilizer-treated plots did not increase consistently after 1959.
- Taxon
- CarrotsDaucus carotat0
- Outcome
- difference in yielde0
- Direction
- did not increase consistentlye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The difference in yield between the manured plots and the fertilizer-treated plots did not increase consistently after 1959”
t0“Carrots”
Claim · model-written summary
The authors interpret the plateau in the yield difference as showing that a saturation level of the factors causing the yield increases had been reached.
- Taxon
- CarrotsDaucus carotat0
- Outcome
- yield increasese0
- Qualifier
- saturation level of the factors causing the yield increases had been reachede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“thus indicating that a saturation level of the factors causing the yield increases had been reached”
t0“Carrots”
Claim · model-written summary
In the presence of FYM, N, P and K fertilizers had only small effects on carrot yields.
- Taxon
- carrotDaucus carotae0
- Treatment
- applications of N, P and K fertilizerse0
- Outcome
- carrot yieldse0
- Direction
- only small effectse0
- Qualifier
- In the presence of FYMe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the presence of FYM, applications of N, P and K fertilizers had only small effects on carrot yields”
Claim · model-written summary
Without FYM, more than 31 lb per acre N as Nitrochalk depressed carrot yields.
- Taxon
- CarrotsDaucus carotat0
- Treatment
- more than 31 lb. per acre N as Nitrochalke0
- Outcome
- yieldse0
- Direction
- depressede0
- Qualifier
- In the absence of FYMe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the absence of FYM, more than 31 lb. per acre N as Nitrochalk depressed yields, whereas both phosphate and potash fertilizers increased them”
t0“Carrots”
Claim · model-written summary
Without FYM, phosphate fertilizer increased carrot yields.
- Taxon
- CarrotsDaucus carotat0
- Treatment
- phosphatee0
- Outcome
- yieldse0
- Direction
- increasede0
- Qualifier
- In the absence of FYMe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the absence of FYM, more than 31 lb. per acre N as Nitrochalk depressed yields, whereas both phosphate and potash fertilizers increased them”
t0“Carrots”
Claim · model-written summary
Without FYM, potash fertilizer increased carrot yields.
- Taxon
- CarrotsDaucus carotat0
- Treatment
- potashe0
- Outcome
- yieldse0
- Direction
- increasede0
- Qualifier
- In the absence of FYMe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the absence of FYM, more than 31 lb. per acre N as Nitrochalk depressed yields, whereas both phosphate and potash fertilizers increased them”
t0“Carrots”
Claim · model-written summary
Carrot plants from FYM plots contained about twice as much potassium as those from fertilizer-only plots.
- Taxon
- CarrotsDaucus carotat0
- Treatment
- FYM plotse0
- Outcome
- potassiume0
- Direction
- moree0
- Value
- about twice as muche0
- Comparator
- fertilizer-only plotse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plants from the FYM plots contained about twice as much potassium and about 30% more phosphorus than those from the fertilizer-only plots”
t0“Carrots”
Claim · model-written summary
Carrot plants from FYM plots contained about 30% more phosphorus than those from fertilizer-only plots.
- Taxon
- CarrotsDaucus carotat0
- Treatment
- FYM plotse0
- Outcome
- phosphoruse0
- Direction
- moree0
- Value
- about 30%e0
- Comparator
- fertilizer-only plotse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plants from the FYM plots contained about twice as much potassium and about 30% more phosphorus than those from the fertilizer-only plots”
t0“Carrots”
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