Abstract
ABSTRACT A study of compost- versus conventionally-fertilized vegetable plots was conducted for 12 years in a sandy loam soil near Truro, Nova Scotia. The fertility treatments have been applied annually to six rotation plots planted with six to eight different vegetable crops. The composts consist of animal manure, food waste, yard waste and straw or racetrack manure bedding. This paper investigated the last year of the study (2001), which examined levels of nutrients in soil, leaf tissue and the edible portion of the plant, and crop yields. The fresh weight yields from the six plots showed that the compost treatment resulted in numerically, but not significantly, higher yields for the carrots, peppers, onions and tomatoes, and significantly higher yields for green and yellow beans. Cauliflower and Brussels sprouts yields, however, were higher in the fertilizer-amended plot. Soils with compost had higher pH, CEC, C, N and Mehlich-3 extractable levels of P, Ca, Mg, MN, Zn and B compared with the fertilized plots. However, the increased nutrients in the compost-amended soil did not increase the nutrients in the leaf tissue or the edible portion of the plant. Of the 16 elements tested, only P and K were higher in the fertilizer-amended plant leaf tissue, while levels of P were significantly higher in the edible portion of the plant. This study demonstrated that the long-term use of compost can produce similar yields and elemental analysis for most crops in compost- amended and conventionally-fertilized soils.
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Claims 11
Claim · model-written summary
Compost treatment gave numerically but not significantly higher yields of carrots, peppers, onions and tomatoes than conventional fertilizer.
Verbatim
t0“Soil Fertility, Yield and Nutrient Contents of Vegetable Crops”
e0“compost- versus conventionally-fertilized vegetable plots”
e1“the compost treatment resulted in numerically, but not significantly, higher yields for the carrots, peppers, onions and tomatoes”
Claim · model-written summary
Compost treatment gave significantly higher yields of green and yellow beans than conventional fertilizer.
Verbatim
e0“compost- versus conventionally-fertilized vegetable plots”
e1“the compost treatment resulted in numerically, but not significantly, higher yields for the carrots, peppers, onions and tomatoes”
e2“significantly higher yields for green and yellow beans”
Claim · model-written summary
Cauliflower and Brussels sprouts yields were higher in the fertilizer-amended plot than in the compost plot.
- Taxon
- Cauliflower and Brussels sprouts
Brassica oleracea var. botrytis
Brassica oleracea var. gemmiferae3 - Treatment
- fertilizer-amended plote3
- Outcome
- yieldse3
- Direction
- highere3
- Comparator
- composte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“compost- versus conventionally-fertilized vegetable plots”
e3“Cauliflower and Brussels sprouts yields, however, were higher in the fertilizer-amended plot”
Claim · model-written summary
Soils with compost had higher pH, CEC and carbon than fertilized plots.
Not reportedTaxon
Verbatim
e4“Soils with compost had higher pH, CEC, C, N and Mehlich-3 extractable levels of P, Ca, Mg, MN, Zn and B compared with the fertilized plots”
Claim · model-written summary
Soils with compost had higher N and Mehlich-3 extractable P and Ca than fertilized plots.
- Treatment
- composte4
- Outcome
- N and Mehlich-3 extractable levels of P, Cae4
- Direction
- highere4
- Comparator
- fertilized plotse4
Not reportedTaxon
Verbatim
e4“Soils with compost had higher pH, CEC, C, N and Mehlich-3 extractable levels of P, Ca, Mg, MN, Zn and B compared with the fertilized plots”
Claim · model-written summary
Soils with compost had higher Mg and Mn than fertilized plots.
Not reportedTaxon
Verbatim
e4“Soils with compost had higher pH, CEC, C, N and Mehlich-3 extractable levels of P, Ca, Mg, MN, Zn and B compared with the fertilized plots”
Claim · model-written summary
Soils with compost had higher Zn and B than fertilized plots.
Not reportedTaxon
Verbatim
e4“Soils with compost had higher pH, CEC, C, N and Mehlich-3 extractable levels of P, Ca, Mg, MN, Zn and B compared with the fertilized plots”
Claim · model-written summary
Increased soil nutrients under compost did not increase nutrients in leaf tissue or the edible portion of vegetables.
- Taxon
- vegetable cropst0
- Treatment
- compost-amended soile5
- Outcome
- nutrients in the leaf tissue or the edible portione5
- Direction
- did not increasee5
Not reportedComparator
Verbatim
t0“Soil Fertility, Yield and Nutrient Contents of Vegetable Crops”
e5“the increased nutrients in the compost-amended soil did not increase the nutrients in the leaf tissue or the edible portion of the plant”
Claim · model-written summary
Of 16 elements tested, only P and K were higher in fertilizer-amended vegetable leaf tissue than in compost-amended.
Verbatim
t0“Soil Fertility, Yield and Nutrient Contents of Vegetable Crops”
e6“Of the 16 elements tested, only P and K were higher in the fertilizer-amended plant leaf tissue”
e7“compost- amended and conventionally-fertilized soils”
Claim · model-written summary
Levels of P were significantly higher in the edible portion of vegetables.
Verbatim
t0“Soil Fertility, Yield and Nutrient Contents of Vegetable Crops”
e7“levels of P were significantly higher in the edible portion of the plant”
Claim · model-written summary
Long-term compost use gave similar yields and elemental analysis for most vegetable crops compared with conventionally fertilized soils.
Verbatim
t0“Soil Fertility, Yield and Nutrient Contents of Vegetable Crops”
e7“the long-term use of compost can produce similar yields and elemental analysis for most crops in compost- amended and conventionally-fertilized soils”
The same questions in other papers
fertilization · yield · Brassica oleracea (wild cabbage)Positive and negative results
50 papers in the same direction as this paper · 445 in the opposite direction
- positive
- positive
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See all 496 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.