P. Wall

ORCID: 0000-0003-3202-8908
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Research Areas
  • Agricultural Innovations and Practices
  • Crop Yield and Soil Fertility
  • Agriculture and Rural Development Research
  • Plant Diversity and Evolution
  • Agronomic Practices and Intercropping Systems
  • Ecology and Conservation Studies
  • Climate change impacts on agriculture
  • Rangeland Management and Livestock Ecology
  • Soil Carbon and Nitrogen Dynamics
  • Rice Cultivation and Yield Improvement
  • Wheat and Barley Genetics and Pathology
  • Agricultural Productivity and Crop Improvement
  • Agricultural Systems and Practices
  • Soil erosion and sediment transport
  • Plant Ecology and Taxonomy Studies
  • Soil Management and Crop Yield
  • Legume Nitrogen Fixing Symbiosis
  • Sustainable Agricultural Systems Analysis
  • Irrigation Practices and Water Management
  • Plant Micronutrient Interactions and Effects
  • Agriculture and Biological Studies
  • Soil Mechanics and Vehicle Dynamics
  • Nematode management and characterization studies
  • Plant responses to elevated CO2
  • Polymer-Based Agricultural Enhancements

EndoGastric Solutions (United States)
2023

Centro Internacional de Mejoramiento de Maíz Y Trigo
1983-2016

Commonwealth Scientific and Industrial Research Organisation
1981

Plant Industry
1981

International Crops Research Institute for the Semi-Arid Tropics
1981

University of Reading
1974

Spring barley cv. Koru and spring wheat Highbury were grown in constant controlled conditions of 16 h photoperiod, temperatures 10 15 °C respectively. A range spike growth developmental attributes closely monitored from seedling emergence to pollination the most advanced floret. Simple, quantitative scales development (0) (10) are proposed, based on morphogenesis initial, then floret finally pistil. These allow (ontogenetic) progress be quantified without involving any attribute or size...

10.1093/oxfordjournals.aob.a086434 article EN Annals of Botany 1983-01-01

Abstract Conservation agriculture (CA) is characterized by surface crop residue retention and minimal soil movement. It a complex technology that involves not only change in many of the farmer's cultural practices, but also mind-set to overcome use plow. CA knowledge-intensive, success with system may depend more on what farmer does than level inputs applied. However, smallholder farmers are generally weak links information systems outside those community, while close community linkages tend...

10.1300/j411v19n01_07 article EN Journal of Crop Improvement 2007-03-15

SUMMARY Conservation agriculture (CA) systems are based on minimal soil disturbance, crop residue retention and rotation. Although the capacity of rotations to break pest disease cycles is generally recognized, other benefits in CA seldom acknowledged little understood. We monitored different conventional cropping over period from 2005 2009 a multi-seasonal trial Monze, southern Zambia. Both monocropped maize including cotton green manure cover sunnhemp ( Crotalaria juncea ) were compared...

10.1017/s001447971000030x article EN Experimental Agriculture 2010-06-09

Abstract Experimentation by farmers with conservation agriculture (CA) is increasing in southern Africa, but local longer term data on these new production systems are scarce. This study focuses CA research at two contrasting on‐farm sites and one on‐station long‐term trial Zimbabwe. The trials were conducted Chikato village a sandy soil Zimuto Communal Area low rainfall Hereford farm near Bindura clay‐rich high area. was Henderson Research Station Mazowe where more in‐depth studies...

10.1111/j.1475-2743.2012.00406.x article EN Soil Use and Management 2012-05-08

Conservation agriculture's underlying principles—minimal soil disturbance, cover and crop rotation—are increasingly recognized as essential for sustainable agriculture. This article summarizes three contrasting cases of adapting conservation agriculture (CA) to smallholder conditions in the (sub)tropics: a) irrigated rice-wheat systems South Asia; b) rainfed maize/wheat wheat Mexico; c) maize Southern Africa. In Asia case, farm surveys show rapid widespread adoption zero tillage...

10.1080/10440046.2011.620230 article EN Journal of Sustainable Agriculture 2012-01-23

Abstract Most models predict that climate change will affect the southern African region both through temperature rises and increased frequency severity of drought. Conservation agriculture (CA) based on minimal soil disturbance, crop residue retention, rotations offers potential solutions to mitigate effects seasonal In Zimbabwe Zambia, we investigated different maize-based CA systems water relations productivity from 2005–2009 compared results with conventionally plowed plots. all seasons,...

10.1080/15427520903558484 article EN Journal of Crop Improvement 2010-04-25

SUMMARY Fourteen cultivars of north temperate, Australian, Mexican and Rhodesian origins, were grown in eight treatments: 2‐day‐lengths (10 h 14h) × two temperature regimes (18/13 °C 25/20 °C) seed vernalization treatments (unvernalized 28 days at 1–2 °C). Numbers to 50 % ear emergence, leaf numbers spikelet the main shoots recorded. The temperate most sensitive daylength: long their mean number was 15 they headed 40–50 days, while short had a 24 spikelets failed head 100 days. least...

10.1111/j.1744-7348.1974.tb01370.x article EN Annals of Applied Biology 1974-04-01

Because of the expected importance photosynthetic activity to yield, relationships leaf traits crop growth rate and yield in 48 genotypes spring wheat, were examined under irrigation northwest Mexico. There three tall 33 short (Norin 10‐derived) bread wheats ( Triticum aestivum L.), eight durum T. turgidum L.) four triticales (X Tritosecale Wittmack). Photosynthetic A ) permeability viscous air flow LP measured weekly using 14 CO 2 , uptake an porometer, respectively. Genotypic effects on...

10.2135/cropsci1981.0011183x002100030004x article EN Crop Science 1981-05-01

Conventional agricultural practices such as the use of moldboard plough are no longer sustainable due to their extensive soil degradation effects. As a panacea, several Conservation Agriculture (CA) technologies have been promoted improve structure and water conservation. However, adoption these has resisted by smallholder farmers identifying causes low rates facilitate intervention strategies remains challenge development practitioners. Using data from 100 farmers, this paper uses Tobit...

10.22004/ag.econ.98851 preprint EN RePEc: Research Papers in Economics 2010-08-01

-1 or no P fertilizer) application. The legumes were velvet bean, pigeonpea, soyabean, groundnut, bunch-type cowpea and Bambara groundnut. Twelve farmers hosted the experiments each farmer formed a group of at least 4 other to evaluate legumes. Farmer participatory monitoring evaluation legume combinations was conducted during experiment determine preferences acceptance technology. Measured grain yields, returns labour total costs P-fertilized compared with those for unfertilized application...

10.5897/ajar09.410 article EN African Journal of Agricultural Research 2010-04-18

Rice-wheat system provides food, income, and employment to over 83 % of the people contributes national food security in Nepal. Sustainability is under threat because increasing cultivation cost declining soil fertility. On-farm experiments were carried out determine effects tillage crop establishment methods, residue management, nitrogen levels that affect attributes productivity rice-wheat during 2010- 2011at Bara, The treatment consisted three methods viz. Conventional (CT), Permanent bed...

10.3126/ajn.v3i0.9007 article EN Agronomy Journal of Nepal 2013-10-24
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