Abstract
The area devoted to growing tobacco (Nicotiana tabacum L.) in the province of Granma, Cuba, accounted for nearly 2600 ha in the year 1997, which represented the 4% of the total tobacco plantation area on the island in that year. Tobacco is tillage-intensive since traditional production systems entail seven or eight cultivation operations before transplanting. The objective of this study was to evaluate two alternative tillage systems in comparison with conventional tillage for tobacco production with the aim to improve soil conditions, reduce the number of tillage operations for soil preparation for transplanting, and increase yields. The treatments studied were: (T1) conventional or traditional tillage, (T2) reduced tillage with a multi-tiller plough, and (T3) reduced tillage with a chisel plough. T1 consisted in disc ploughing twice and disc harrowing twice for primary tillage, while before transplanting plots were ploughed twice with a horse-drawn mouldboard plough and harrowed twice with a horse-drawn spike-tooth harrow. In T2 primary tillage was accomplished with two passes with the multi-tiller followed by disc harrowing twice before transplanting. In T3 chisel ploughing was substituted for multi-tiller ploughing. The two reduced tillage systems improved the physical conditions of the soil, which resulted in: lower bulk density, with average values across the 0-30 cm soil profile of 1.48, 1.34 and 1.30 Mg m-3 in T1, T2 and T3, respectively, at the end of the growing season; higher soil water content in the soil profile in all four sampling dates per season; greater porosity; and lower resistance to penetration with values of 2.48, 2.15 and 1.71 MPa in T1, T2 and T3, respectively, before crop harvesting. Tillage system T3 provided the highest crop yields (2.26 Mg ha-1) compared with T2 (2.14 Mg ha-1) and T1 (1.95 Mg ha-1), for the plants grown on T3 plots had the largest number of leaves. The size of the leaves was similar in all three systems, however.
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Claims 9
Claim · model-written summary
Reduced tillage improved the physical conditions of the soil under tobacco in Granma, Cuba.
- Taxon
- Nicotiana tabacum
Nicotiana tabacume0 - Treatment
- reduced tillagee6
- Outcome
- physical conditions of the soile1
- Direction
- improvede1
- Comparator
- conventional or traditional tillagee7
- Setting
- province of Granma, Cubae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The area devoted to growing tobacco (Nicotiana tabacum L.) in the province of Granma, Cuba”
e1“The two reduced tillage systems improved the physical conditions of the soil”
e6“(T2) reduced tillage with a multi-tiller plough”
e7“(T1) conventional or traditional tillage”
Claim · model-written summary
Reduced tillage lowered soil bulk density under tobacco, to 1.34 and 1.30 Mg m-3 in T2 and T3 versus 1.48 in T1.
- Taxon
- Nicotiana tabacumNicotiana tabacume0
- Treatment
- reduced tillagee6
- Outcome
- bulk densitye2
- Direction
- lowere2
- Value
- 1.48, 1.34 and 1.30 Mg m-3e2
- Comparator
- conventional or traditional tillagee7
- Setting
- province of Granma, Cubae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The area devoted to growing tobacco (Nicotiana tabacum L.) in the province of Granma, Cuba”
e2“lower bulk density, with average values across the 0-30 cm soil profile of 1.48, 1.34 and 1.30 Mg m-3 in T1, T2 and T3, respectively, at the end of the growing season”
e6“(T2) reduced tillage with a multi-tiller plough”
e7“(T1) conventional or traditional tillage”
Claim · model-written summary
Reduced tillage gave higher soil water content in the soil profile under tobacco on all four sampling dates per season.
- Taxon
- Nicotiana tabacumNicotiana tabacume0
- Treatment
- reduced tillagee6
- Outcome
- soil water contente3
- Direction
- highere3
- Comparator
- conventional or traditional tillagee7
- Setting
- province of Granma, Cubae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The area devoted to growing tobacco (Nicotiana tabacum L.) in the province of Granma, Cuba”
e3“higher soil water content in the soil profile in all four sampling dates per season”
e6“(T2) reduced tillage with a multi-tiller plough”
e7“(T1) conventional or traditional tillage”
Claim · model-written summary
Reduced tillage gave greater soil porosity under tobacco.
- Taxon
- Nicotiana tabacumNicotiana tabacume0
- Treatment
- reduced tillagee6
- Outcome
- porositye4
- Direction
- greatere4
- Comparator
- conventional or traditional tillagee7
- Setting
- province of Granma, Cubae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The area devoted to growing tobacco (Nicotiana tabacum L.) in the province of Granma, Cuba”
e4“greater porosity”
e6“(T2) reduced tillage with a multi-tiller plough”
e7“(T1) conventional or traditional tillage”
Claim · model-written summary
Reduced tillage gave lower soil resistance to penetration under tobacco, 2.15 and 1.71 MPa in T2 and T3 versus 2.48 MPa in T1.
- Taxon
- Nicotiana tabacumNicotiana tabacume0
- Treatment
- reduced tillagee6
- Outcome
- resistance to penetratione5
- Direction
- lowere5
- Value
- 2.48, 2.15 and 1.71 MPae5
- Comparator
- conventional or traditional tillagee7
- Setting
- province of Granma, Cubae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The area devoted to growing tobacco (Nicotiana tabacum L.) in the province of Granma, Cuba”
e5“lower resistance to penetration with values of 2.48, 2.15 and 1.71 MPa in T1, T2 and T3, respectively, before crop harvesting”
e6“(T2) reduced tillage with a multi-tiller plough”
e7“(T1) conventional or traditional tillage”
Claim · model-written summary
Tillage system T3 gave the highest tobacco crop yield compared with T2.
- Taxon
- Nicotiana tabacumNicotiana tabacume0
- Treatment
- Tillage system T3e6
- Outcome
- crop yieldse6
- Direction
- higheste6
- Value
- 2.26 Mg ha-1e6
- Qualifier
- 2.14 Mg ha-1e6
- Comparator
- T2e6
- Setting
- province of Granma, Cubae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The area devoted to growing tobacco (Nicotiana tabacum L.) in the province of Granma, Cuba”
e6“Tillage system T3 provided the highest crop yields (2.26 Mg ha-1) compared with T2 (2.14 Mg ha-1) and T1 (1.95 Mg ha-1)”
Claim · model-written summary
Tillage system T3 gave the highest tobacco crop yield compared with T1.
- Taxon
- Nicotiana tabacumNicotiana tabacume0
- Treatment
- Tillage system T3e6
- Outcome
- crop yieldse6
- Direction
- higheste6
- Value
- 2.26 Mg ha-1e6
- Qualifier
- 1.95 Mg ha-1e6
- Comparator
- T1e6
- Setting
- province of Granma, Cubae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The area devoted to growing tobacco (Nicotiana tabacum L.) in the province of Granma, Cuba”
e6“Tillage system T3 provided the highest crop yields (2.26 Mg ha-1) compared with T2 (2.14 Mg ha-1) and T1 (1.95 Mg ha-1)”
Claim · model-written summary
Plants grown on T3 plots had the largest number of tobacco leaves.
- Taxon
- Nicotiana tabacumNicotiana tabacume0
- Treatment
- T3 plotse7
- Outcome
- number of leavese7
- Direction
- largeste7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The area devoted to growing tobacco (Nicotiana tabacum L.) in the province of Granma, Cuba”
e7“for the plants grown on T3 plots had the largest number of leaves”
Claim · model-written summary
Leaf size of tobacco was similar in all three tillage systems.
- Taxon
- Nicotiana tabacumNicotiana tabacume0
- Outcome
- size of the leavese1
- Direction
- similare1
- Setting
- province of Granma, Cubae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The area devoted to growing tobacco (Nicotiana tabacum L.) in the province of Granma, Cuba”
e1“The size of the leaves was similar in all three systems”
The same questions in other papers
tillage · soil: physics · Nicotiana tabacum (tobacco)Positive and negative results
3 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
- positive
1 paper more in this group
See all 5 papers →tillage · yield · Nicotiana tabacum (tobacco)Positive and negative results
7 papers in the same direction as this paper · 7 in the opposite direction · 1 reporting no difference from an alternative
- no effect
- negative
- negative
12 papers more in this group
See all 16 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.