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Jacob Ulzen
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Bradyrhizobium Inoculants Enhance Grain Yields of Soybean and Cowpea in Northern Ghana
J Ulzen, RC Abaidoo, NE Mensah, C Masso, AAH AbdelGadir
Frontiers in plant science 7, 1770, 2016
1452016
On-farm evaluation and determination of sources of variability of soybean response to Bradyrhizobium inoculation and phosphorus fertilizer in northern Ghana
J Ulzen, RC Abaidoo, N Ewusi-Mensah, C Masso
Agriculture, Ecosystems & Environment 267, 23-32, 2018
472018
Biological inoculants for sustainable intensification of agriculture in sub-Saharan Africa smallholder farming systems
C Masso, RW Mukhongo, M Thuita, R Abaidoo, J Ulzen, G Kariuki, ...
Climate Change and Multi-Dimensional Sustainability in African Agriculture …, 2016
302016
The tricot citizen science approach applied to on-farm variety evaluation: Methodological progress and perspectives
J Etten, E Abidin, E Arnaud, D Brown, E Carey, MA Laporte, ...
RTB Working Paper, 2020
182020
Organic manure improves soybean response to rhizobia inoculant and P-fertilizer in northern Ghana
J Ulzen, RC Abaidoo, N Ewusi-Mensah, O Osei, C Masso, A Opoku
Frontiers in Agronomy 2, 9, 2020
122020
Is there a need for Bradyrhizobium yuanmingense and B. japonicum reinoculation in subsequent cropping seasons under smallholder farmers’ conditions?
J Ulzen, RC Abaidoo, C Masso, EDJ Owusu-Ansah, N Ewusi-Mensah
Applied Soil Ecology 128, 54-60, 2018
122018
Combined application of inoculant, phosphorus and organic manure improves grain yield of cowpea
J Ulzen, RC Abaidoo, N Ewusi-Mensah, C Masso
Archives of Agronomy and Soil Science 66 (10), 1358-1372, 2020
102020
Soybean (Glycine max L. Merrill) responds to phosphorus application and rhizobium inoculation on Acrisols of the semi-deciduous forest agro-ecological zone of Ghana
S Adjei-Nsiah, D Martei, A Yakubu, J Ulzen
PeerJ 10, e12671, 2022
82022
The tricot approach: an agile framework for decentralized on-farm testing supported by citizen science. A retrospective
K de Sousa, J van Etten, R Manners, E Abidin, RO Abdulmalik, B Abolore, ...
Agronomy for Sustainable Development 44 (1), 8, 2024
62024
ASSESSING THE NEED FOR INOCULATION OF SOYBEAN AND COWPEA AT TONO IN THE KASSENA NANKANA DISTRICT OF THE UPPER EAST REGION OF GHANA
J ULZEN
KNUST, 2013
62013
Optimizing legume-rhizobia symbiosis to enhance legume grain yield in smallholder farming systems in Ghana
J Ulzen
42018
Native Rhizobia Strains Enhance Seed Yield of Groundnut Varieties in Northern Ghana
G Wilson, J Ulzen, RC Abaidoo, A Opoku, S Adjei-Nsiah, O Osei
Frontiers in Agronomy 3, 653044, 2021
22021
Growing media, water stress and re-watering effects on the growth and dry matter production of cocoa seedlings
LO Mintah, GK Ofosu-Budu, NO Osei-Bonsu, J Ulzen, EO Danso
Acta Universitatis Sapientiae, Agriculture and Environment 14 (1), 45-61, 2022
12022
Impact of allelochemicals from shade trees bark on the performance of cocoa seedlings
J Danso, IK Boadu, J Sarkodie‐Addo, MO Opoku‐Agyeman, F Padi, ...
Agrosystems, Geosciences & Environment 7 (3), e20543, 2024
2024
A new phosphorus fertilizer blend enhances grain legume yield and profitability in northern part of Ghana
S Adjei-Nsiah, J Ulzen
Scientific African, e02273, 2024
2024
Mitigation of greenhouse gas emissions through shade systems and climate-smart soil fertility interventions in cocoa landscapes in the Semi-deciduous ecological zone of Ghana
J Anokye, AA Abunyewa, U Jørgensen, JS Kaba, K Twum-Ampofo, ...
Soil Advances 1, 100001, 2024
2024
Step-wise guide for weighing cocoa
J Ulzen, J Etten
2021
Cocoa trait rankings for tricot
J Ulzen, B Ortiz-Crespo, J Etten
2021
Can Solar-Powered Irrigation Systems Naturally Meet Crop Water Requirements? Proof of Concept from a Case Study in Sub–Saharan Africa
E Oppong Danso, CA Dietzen, W Akortey, BK Boadi, PB Obour, ...
Proof of Concept from a Case Study in Sub–Saharan Africa, 0
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