P. D. Johnstone
P. D. Johnstone publishes mostly in Agronomy and Crop Science, Plant Science and Ecology, on topics such as Ruminant Nutrition and Digestive Physiology, Reproductive Physiology in Livestock and Agronomic Practices and Intercropping Systems.
- World rank
- #974,844 of 1,633,909 ranked researchers
- Rank in New Zealand
- #3,155 of 4,714
- Works
- 19
- Citations
- 41
- Citations per work
- 2.2
What does P. D. Johnstone research?
Shares of their own output, by the field each of their topics belongs to. The grey slice is everything not listed.
- 1Agronomy and Crop Science37% of their works
- 2Plant Science16% of their works
- 3Ecology10% of their works
- 4Genetics5% of their works
- 5Forestry5% of their works
- 6Soil Science5% of their works
Research topics
- Ruminant Nutrition and Digestive Physiology
- Reproductive Physiology in Livestock
- Agronomic Practices and Intercropping Systems
- Agricultural Productivity and Crop Improvement
- Pasture and Agricultural Systems
- Botany and Plant Ecology Studies
- Legume Nitrogen Fixing Symbiosis
- Plant Growth Enhancement Techniques
Which keywords describe P. D. Johnstone's research?
The keywords of their largest research topics: Nitrogen Fixation, Sustainable Agriculture, Agricultural Productivity, Climate Change, Intercropping, Methane Production, Reproductive Loss and Ruminant Nutrition.
- Symbiosis
- Perennial Pastures
- Grazing Management
- Crop Adaptation
- Biostimulants
- Ruminant Nutrition
- Methane Production
- Climate Change
- Sustainable Agriculture
- Nitrogen Fixation
- Agricultural Productivity
- Intercropping
- Reproductive Loss
- Uterine Disease
- Conservation
- Forage Production
- Legumes
- Plant Growth
- Vascular Plants
Size is their works in the topics tagged with each word, from their 8 largest topics. Each links to the topic it comes from most.
All 19 words, with their numbers
- Nitrogen Fixation32 topics
- Sustainable Agriculture32 topics
- Agricultural Productivity21 topic
- Climate Change22 topics
- Intercropping21 topic
- Methane Production21 topic
- Reproductive Loss21 topic
- Ruminant Nutrition21 topic
- Uterine Disease21 topic
- Biostimulants11 topic
- Conservation11 topic
- Crop Adaptation11 topic
- Forage Production11 topic
- Grazing Management11 topic
- Legumes11 topic
- Perennial Pastures11 topic
- Plant Growth11 topic
- Symbiosis11 topic
- Vascular Plants11 topic
Where does P. D. Johnstone work?
P. D. Johnstone's main affiliation in the publication record is AgResearch, New Zealand.
How many publications and citations does P. D. Johnstone have?
Science Explorer counts 19 works and 41 citations for P. D. Johnstone, ranking #974,844 of 1,633,909 researchers worldwide on the composite score.
Ranked on field-normalised excellence (50%), output (30%) and citations (20%). Counts come from OpenAlex author records, which occasionally merge different people who share a name or split one person into several.
Papers, co-authors, who cited this work and researchers on the nearest topics are in the interactive view on the map. Is this your page? Request a correction or removal.