Abstract
The effects of the different sowing rates of 20, 40, and 60 lb of seed an acre on the yield, bushel weight, composition, and response to fertilizers, of wheat grown on soils of high fertility has been studied in seven field experiments in the wheat-belt of southern New South Wales. Seasonal conditions ranged from drought to lush growing conditions and in addition one experiment was irrigated to reduce the effects of moisture stress on plant growth. Yields ranged from 10 to 70 bushels of wheat an acre and fertilizer treatments gave both positive and negative effects. For the wide range of growth conditions, variation in seeding rate had only small and non-significant effects on grain yields, with the exception of the irrigated experiment where a consistent trend indicated the need for higher seeding rates for maximum yield. Effects of the seeding rates on grain size and composition and fertilizer response, were negligible. Losses in potential grain yield, caused by the exhaustion of soil moisture reserves by excessive vegetative growth of high fertility soils before grain development has been completed, does not seem to be reduced appreciably by the use of low seeding rates.
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Claims 7
Claim · model-written summary
Wheat yields ranged from 10 to 70 bushels an acre.
- Taxon
- wheat
Triticum aestivume0 - Outcome
- Yieldse0
- Value
- 10 to 70 bushels of wheat an acree0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yields ranged from 10 to 70 bushels of wheat an acre”
Claim · model-written summary
Fertilizers had positive and negative yield effects.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- fertilizer treatmentse0
- Outcome
- positive and negative effectse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“fertilizer treatments gave both positive and negative effects.”
t0“wheat”
Claim · model-written summary
Sowing rate had small, nonsignificant effects on grain yield across conditions.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- variation in seeding ratee0
- Outcome
- grain yieldse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“variation in seeding rate had only small and non-significant effects on grain yields”
t0“wheat”
Claim · model-written summary
Under irrigation, higher seeding rates appeared needed for maximum yield.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- seeding ratese0
- Outcome
- maximum yielde0
- Direction
- highere0
- Setting
- irrigated experimente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the irrigated experiment where a consistent trend indicated the need for higher seeding rates for maximum yield.”
t0“wheat”
Claim · model-written summary
Seeding rates had negligible effects on grain size and composition.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- seeding ratese0
- Outcome
- grain size and compositione0
- Direction
- negligiblee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Effects of the seeding rates on grain size and composition and fertilizer response, were negligible.”
t0“wheat”
Claim · model-written summary
Seeding rate effects on fertilizer response were negligible.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- seeding ratese0
- Outcome
- fertilizer responsee0
- Direction
- negligiblee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Effects of the seeding rates on grain size and composition and fertilizer response, were negligible.”
t0“wheat”
Claim · model-written summary
Low seeding rates did not appreciably reduce yield losses linked to soil moisture exhaustion.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- low seeding ratese0
- Outcome
- Losses in potential grain yielde0
- Direction
- does not seem to be reduced appreciablye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Losses in potential grain yield, caused by the exhaustion of soil moisture reserves by excessive vegetative growth of high fertility soils before grain development has been completed, does not seem to be reduced appreciably by the use of low seeding rates.”
t0“wheat”
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