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Peter Hobbs
Cornell University
25Publications
11H-index
1,590Citations
Publications 25
Newest
#1Phillip S.D. Frost (Cornell University)
#2Harold M. van Es (Cornell University)H-Index: 21
Last.Prabhu Pingali (Cornell University)H-Index: 40
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Abstract Soil health (SH) of managed lands in India is affected by anthropogenic activities such as nutrient mining, excessive tillage, and monocropping, which reduce the productive capacity of soils. A comprehensive SH characterization was conducted in 27 catchments in six districts of Jharkhand, India. Each was stratified into four landscape positions: (i) uncultivated upland in tree vegetation, (ii) cultivated upland in garden or orchard use, and (iii) midland and (iv) lowland areas in rice-f...
#1Lydiah Gatere (Cornell University)H-Index: 2
#2Johannes Lehmann (Cornell University)H-Index: 79
Last.Alexander J. Travis (Cornell University)H-Index: 23
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Abstract Conservation agriculture practices have been successfully applied to improve crop yields in South America, but questions arose whether these practices can be successfully implemented in Africa. Here we show that a specific set of soil conservation practices called conservation farming (CF) using planting basins and hand hoes disseminated on 280 farms in Zambia on average failed to increase maize yields compared to traditional farming (TF). Average grain yield was low with 1.2 t ha −1 , ...
#1Matthew P. Reynolds (CIMMYT: International Maize and Wheat Improvement Center)H-Index: 61
#2Jonathan Hellin (CIMMYT: International Maize and Wheat Improvement Center)H-Index: 5
Last.Hans J. Braun (CIMMYT: International Maize and Wheat Improvement Center)H-Index: 8
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The International Wheat Improvement Network (IWIN), an alliance of national agricultural research systems (NARSs), International Maize and Wheat Improvement Center (CIMMYT), International Center for Agricultural Research in the Dry Areas (ICARDA), and advanced research institutes (ARIs), continues to deploy cutting-edge science alongside practical multi-disciplinary applications, resulting in the development of germplasm that has made major contributions during the Green Revolution. The continuo...
#1V. R. Haden (Cornell University)H-Index: 6
#2Jing Xiang (Rice University)H-Index: 3
Last.John M. Duxbury (Cornell University)H-Index: 30
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Recent studies indicate that aerobic rice can suffer injury from ammonia toxicity when urea is applied at seeding. Urea application rate and soil properties influence the accumulation of ammonia in the vicinity of recently sown seeds and hence influence the risk of ammonia toxicity. The objectives of this study were to (i) evaluate the effects of urea rate on ammonia volatilization and subsequent seed germination for a range of soils, (ii) establish a critical level for ammonia toxicity in germi...
#1Dorisel Torres-Rojas (Cornell University)H-Index: 2
#2Johannes Lehmann (Cornell University)H-Index: 79
Last.Henry NeufeldtH-Index: 12
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Pyrolytic cook stoves in smallholder farms may require different biomass supply than traditional bioenergy approaches. Therefore, we carried out an on-farm assessment of the energy consumption for food preparation, the biomass availability relevant to conventional and pyrolytic cook stoves, and the potential biochar generation in rural households of western Kenya. Biomass availability for pyrolysis varied widely from 0.7 to 12.4 Mg ha � 1 y � 1 with an average of 4.3 Mg ha � 1 y � 1 , across all...
#1V. R. Haden (Cornell University)H-Index: 6
#2Jing Xiang (Rice University)H-Index: 3
Last.John M. Duxbury (Cornell University)H-Index: 30
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Recent studies have documented adverse affects of urea on the establishment and growth of aerobic rice when applied at seeding. The following experiments were conducted to examine the relative importance of ammonia and nitrite (NO) toxicities as mechanisms contributing to poor germination and early growth of aerobic rice. Soil was collected from an experiment in the Philippines where aerobic rice was grown continuously for 7 years. Subsamples of the soil were: (1) pretreated with sulfuric acid (...
#1Peter Hobbs (Cornell University)H-Index: 11
#2Mahmood OsmanzaiH-Index: 1
Rainfed farming in South Asia uses some 60% of agricultural land. Much of this land receives no irrigation but some receives a partial or life-saving water supplement. These rainfed lands have a wide array of climates, rainfall regimes and soil types, which determine their cropping systems. The major systems in Afghanistan, Bangladesh, India, Nepal and Pakistan are described. Various common features are discussed, including use of animals, fallowing, mixed cropping, rotations, legumes, manual la...
#1Peter HobbsH-Index: 11
#2Bram GovaertsH-Index: 34
Agriculture contributes significantly to greenhouse gas (GHG) emissions: CO 2 , CH 4 and N 2 O. Promoting agricultural practices that mitigate climate change by reducing GHG emissions is important; but those same practices also have to improve farmer production and income and buffer the production system against changes in climate. New agricultural practices also need to prevent further soil degradation and improve system resilience. Conservation agriculture (CA), based on minimal soil disturban...
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