Abstract
Abstract Farmers occasionally put land into peanut (Arachis hypogaea L.) production that has not been cropped with peanuts in recent history. These fields are generally sparsely populated, if at all, by peanut rhizobia and may be responsive to application of effective peanut inoculant. To field test the need for inoculants, 13 experiments were conducted during 1980-1982 on “new” land on farms in the peanut producing region of southeastern Alabama. Treatments were (1) uninoculated control, (2) granular inoculant applied in-furrow at 3X recommended rate, and (3) ammonium nitrate at 56 kg/ha of N at planting. In 1980, an additional 56 kg N was applied at early bloom. The soil was sampled prior to treatment and numbers of rhizobia capable of nodulating peanuts determined by the most probable number (MPN) procedure. Numbers ranged from nil to 1600 rhizobia per g of soil. Although the soil at six locations contained fewer than 20 rhizobia per g, no yield responses to applied inoculant were obtained. Vine growth, leaf color, and nitrogen content of leaves were unaffected by inoculant. The inoculant provided 1 million rhizobia per seed, which is considered abundant. Lack of any yield responses to fertilizer nitrogen during the 3-year study indicated nitrogen sufficiency in the peanut plants, derived through nodulation and nitrogen fixation by native soil rhizobia. While peanut was not a host legume for these rhizobia during the years prior to these experiments, the rhizobia apparently persisted on alternate legume hosts in the cowpea miscellany in numbers adequate for effective inoculation of peanuts.
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Claims 6
Claim · model-written summary
Inoculating peanut on new land in Alabama produced no yield response compared with the uninoculated control.
- Taxon
- Peanuts
Arachis hypogaeat0 - Treatment
- applied inoculante0
- Outcome
- yielde0
- Direction
- no_changeinferrede0
- Comparator
- uninoculated controle1
Not reportedInteractor
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Peanuts”
e0“no yield responses to applied inoculant were obtained”
e1“Treatments were (1) uninoculated control”
Claim · model-written summary
Vine growth, leaf color and leaf nitrogen content of peanut were unaffected by inoculant.
- Taxon
- PeanutsArachis hypogaeat0
- Treatment
- inoculante0
- Outcome
- Vine growth, leaf color, and nitrogen content of leavese0
- Direction
- unaffectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Peanuts”
e0“Vine growth, leaf color, and nitrogen content of leaves were unaffected by inoculant”
Claim · model-written summary
Soil numbers of peanut-nodulating rhizobia ranged from nil to 1600 per g of soil, determined by the most probable number procedure.
Verbatim
e0“Numbers ranged from nil to 1600 rhizobia per g of soil”
Claim · model-written summary
Peanut showed no yield response to fertilizer nitrogen over the 3-year study, indicating nitrogen sufficiency.
- Taxon
- peanutArachis hypogaeae0
- Treatment
- fertilizer nitrogene0
- Outcome
- yielde0
- Direction
- no_changeinferrede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lack of any yield responses to fertilizer nitrogen during the 3-year study indicated nitrogen sufficiency in the peanut plants”
Claim · model-written summary
Nitrogen sufficiency of the peanut plants was apparently derived through nodulation and nitrogen fixation by native soil rhizobia.
- Taxon
- peanutArachis hypogaeae0
- Interactor
- native soil rhizobiae0symbiont
- Outcome
- nitrogen sufficiencye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“nitrogen sufficiency in the peanut plants, derived through nodulation and nitrogen fixation by native soil rhizobia”
Claim · model-written summary
The rhizobia apparently persisted on alternate legume hosts in the cowpea miscellany in numbers adequate for effective peanut inoculation.
Verbatim
e0“the rhizobia apparently persisted on alternate legume hosts in the cowpea miscellany in numbers adequate for effective inoculation of peanuts”
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