Abstract
Abstract In semi‐arid Central Namibia, poor sandy soils limit sustainable crop production. We assessed cabbage performance in two split‐plot field experiments. In Experiment 1, treatments comprised two irrigation levels: full irrigation (watered 3 days a week) and reduced irrigation (watered 2 days a week) as the main plot factor and six soil amendments (biochar; compost; zeolite; nitrogen, phosphorus potassium [NPK]; Be‐Grow boost [L] hydrogel; and hoof and horn + bone [HHB] meal) as subplot factors in three replications. Full irrigation produced a significantly higher yield (21.1 t ha −1 ), head weight (0.958 kg) and larger head girths (42.1 cm). Biochar produced the highest marketable heads (24,884 heads ha −1 ), water use efficiency (76.0 kg ha −1 mm −1 ) and the largest head girths (42.7 cm). In Experiment 2, water was applied 5 and 4 days a week for full and reduced irrigation; the application rates of compost, HHB meal, Be‐Grow boost (L) hydrogel and NPK were modified. The interaction of Be‐Grow boost (L) hydrogel, NPK and biochar with full irrigation and HHB meal with reduced irrigation produced more marketable heads (28,935, 28,009, 27,546 and 28,703 heads ha −1 , respectively). Therefore, full irrigation with these amendments could be used for resilient cabbage production in Central Namibia.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by-nc-nd. Read at the source ↗
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 11
Claim · model-written summary
Full irrigation increased cabbage yield.
- Taxon
- cabbage
Brassica oleracea var. capitatat0 - Treatment
- Full irrigatione0
- Outcome
- yielde0
- Direction
- highere0
- Value
- 21.1 t ha −1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Full irrigation produced a significantly higher yield (21.1 t ha −1 )”
t0“cabbage”
Claim · model-written summary
Full irrigation increased cabbage head weight.
- Taxon
- cabbageBrassica oleracea var. capitatat0
- Treatment
- Full irrigatione0
- Outcome
- head weighte0
- Direction
- highere0
- Value
- 0.958 kge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Full irrigation produced a significantly higher yield (21.1 t ha −1 ), head weight (0.958 kg)”
t0“cabbage”
Claim · model-written summary
Full irrigation produced larger cabbage head girths.
- Taxon
- cabbageBrassica oleracea var. capitatat0
- Treatment
- Full irrigatione0
- Outcome
- head girthse0
- Direction
- largere0
- Value
- 42.1 cme0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Full irrigation produced a significantly higher yield (21.1 t ha −1 ), head weight (0.958 kg) and larger head girths (42.1 cm)”
t0“cabbage”
Claim · model-written summary
Biochar produced the highest number of marketable cabbage heads.
- Taxon
- cabbageBrassica oleracea var. capitatat0
- Treatment
- Biochare0
- Outcome
- marketable headse0
- Direction
- higheste0
- Value
- 24,884 heads ha −1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Biochar produced the highest marketable heads (24,884 heads ha −1 )”
t0“cabbage”
Claim · model-written summary
Biochar produced the highest water use efficiency.
- Taxon
- cabbageBrassica oleracea var. capitatat0
- Treatment
- Biochare0
- Outcome
- water use efficiencye0
- Direction
- higheste0
- Value
- 76.0 kg ha −1 mm −1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Biochar produced the highest marketable heads (24,884 heads ha −1 ), water use efficiency (76.0 kg ha −1 mm −1 )”
t0“cabbage”
Claim · model-written summary
Biochar produced the largest cabbage head girths.
- Taxon
- cabbageBrassica oleracea var. capitatat0
- Treatment
- Biochare0
- Outcome
- head girthse0
- Direction
- largeste0
- Value
- 42.7 cme0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Biochar produced the highest marketable heads (24,884 heads ha −1 ), water use efficiency (76.0 kg ha −1 mm −1 ) and the largest head girths (42.7 cm)”
t0“cabbage”
Claim · model-written summary
Be-Grow boost hydrogel with full irrigation produced more marketable heads.
- Taxon
- cabbageBrassica oleracea var. capitatat0
- Treatment
- Be‐Grow boost (L) hydrogele0
- Outcome
- marketable headse0
- Direction
- moree0
- Value
- 28,935e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The interaction of Be‐Grow boost (L) hydrogel, NPK and biochar with full irrigation and HHB meal with reduced irrigation produced more marketable heads (28,935, 28,009, 27,546 and 28,703 heads ha −1 , respectively)”
t0“cabbage”
Claim · model-written summary
NPK with full irrigation produced more marketable heads.
- Taxon
- cabbageBrassica oleracea var. capitatat0
- Treatment
- NPKe0
- Outcome
- marketable headse0
- Direction
- moree0
- Value
- 28,009e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The interaction of Be‐Grow boost (L) hydrogel, NPK and biochar with full irrigation and HHB meal with reduced irrigation produced more marketable heads (28,935, 28,009, 27,546 and 28,703 heads ha −1 , respectively)”
t0“cabbage”
Claim · model-written summary
Biochar with full irrigation produced more marketable heads.
- Taxon
- cabbageBrassica oleracea var. capitatat0
- Treatment
- biochare0
- Outcome
- marketable headse0
- Direction
- moree0
- Value
- 27,546e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The interaction of Be‐Grow boost (L) hydrogel, NPK and biochar with full irrigation and HHB meal with reduced irrigation produced more marketable heads (28,935, 28,009, 27,546 and 28,703 heads ha −1 , respectively)”
t0“cabbage”
Claim · model-written summary
HHB meal with reduced irrigation produced more marketable heads.
- Taxon
- cabbageBrassica oleracea var. capitatat0
- Treatment
- HHB meale0
- Outcome
- marketable headse0
- Direction
- moree0
- Value
- 28,703 heads ha −1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The interaction of Be‐Grow boost (L) hydrogel, NPK and biochar with full irrigation and HHB meal with reduced irrigation produced more marketable heads (28,935, 28,009, 27,546 and 28,703 heads ha −1 , respectively)”
t0“cabbage”
Claim · model-written summary
Authors recommend full irrigation with the amendments for resilient cabbage production.
- Taxon
- cabbageBrassica oleracea var. capitatae0
- Outcome
- full irrigation with these amendments could be used for resilient cabbage productione0
- Setting
- Central Namibiae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Therefore, full irrigation with these amendments could be used for resilient cabbage production in Central Namibia.”
The same questions in other papers
fertilization · quality: postharvest · Brassica oleracea (wild cabbage)Positive and negative results
49 papers in the same direction as this paper · 4 in the opposite direction · 1 reporting no difference from an alternative
- positive
- no effect
- no effect
51 papers more in this group
See all 55 papers →irrigation · yield · Brassica oleracea (wild cabbage)Positive and negative results
46 papers in the same direction as this paper · 16 in the opposite direction · 1 reporting no difference from an alternative
- negative
- positive
- negative
60 papers more in this group
See all 64 papers →biochar · physiology: water · Brassica oleracea (wild cabbage)Results agree
1 paper in the same direction as this paper
- positive
biochar · quality: postharvest · Brassica oleracea (wild cabbage)Results agree
4 papers in the same direction as this paper
- positive
- positive
- positive
1 paper more in this group
See all 5 papers →other · quality: postharvest · Brassica oleracea (wild cabbage)Results agree
6 papers in the same direction as this paper
- positive
- positive
- positive
3 papers more in this group
See all 7 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.