Abstract
Summary In sixteen factorial field trials with N, P, K, Mg, trace element and farmyard manure treatments, yields declined during the first four years of cropping following a resting period under grass, responses to K and farmyard manure increased, and other treatments showed no significant changes. After a few years of continuous cropping potassium deficiency may seriously limit yields, especially of sweet potatoes. N, P and K fertilizers maintained yields as well as the farmyard manure treatment.
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The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 6
Claim · model-written summary
Crop yields declined during the first four years following a grass resting period.
- Outcome
- yieldse0
- Direction
- declinede0
- Qualifier
- first four years of cropping following a resting period under grasse0
- Setting
- Ugandat0
Not reportedTaxon
Verbatim
t0“Continuous Cropping in Uganda”
e0“yields declined during the first four years of cropping following a resting period under grass”
Claim · model-written summary
Responses to K increased during the trials.
- Taxon
- sweet potatoes
_Flower.jpg?width=60)
Ipomoea batatase1 - Treatment
- Ke0
- Outcome
- responses to Ke0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Flower.jpg?width=500)
Verbatim
e0“responses to K and farmyard manure increased”
e1“especially of sweet potatoes”
Claim · model-written summary
Responses to farmyard manure increased during the trials.
- Taxon
- sweet potatoesIpomoea batatase1
- Treatment
- farmyard manuree0
- Outcome
- responses to K and farmyard manuree0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“responses to K and farmyard manure increased”
e1“especially of sweet potatoes”
Claim · model-written summary
Other fertilizer treatments showed no significant change in response.
- Taxon
- sweet potatoesIpomoea batatase1
- Outcome
- other treatmentse0
- Direction
- no significant changese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“other treatments showed no significant changes”
e1“especially of sweet potatoes”
Claim · model-written summary
Potassium deficiency may seriously limit crop yields after several years of continuous cropping, especially sweet potatoes.
- Taxon
- sweet potatoesIpomoea batatase0
- Compound
- potassiume0
- Outcome
- yieldse0
- Qualifier
- After a few years of continuous croppinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“After a few years of continuous cropping potassium deficiency may seriously limit yields, especially of sweet potatoes.”
Claim · model-written summary
N, P, and K fertilizers maintained yields as well as farmyard manure.
- Taxon
- sweet potatoesIpomoea batatase1
- Treatment
- N, P and K fertilizerse0
- Outcome
- yieldse0
- Direction
- maintainede0
- Comparator
- farmyard manure treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N, P and K fertilizers maintained yields as well as the farmyard manure treatment.”
e1“especially of sweet potatoes”
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