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Sites regression and shifted multiplicative model clustering of cultivar trial sites under heterogeneity of error variances
Previous papers have developed the shifted multiplicative model with one multiplicative term (SHMM1) as a model for clustering yield trial sites or cultivars into groups in which cultivar rank changes are statistically ...
Increasing wheat yields sustainability through agronomic means
This paper examines common factors that constrain wheat yields: insufficient nutrients (using nitrogen as an example); problems of late planting and poor crop establishment; suboptimal water management; lodging; and weeds. ...
Velvetbean: A "new" plant with a history
Velvetbean (Mucuna spp.), a vigorous climbing legume of Asian origin, is prominent among the plants currently promoted for use as a green manure and cover crop in the humid tropics. What is not so well known, however, is ...
Wheat and rice in the mid-hills of Nepal: A benchmark report on farm resources and production practices in Kavre District
(CIMMYT; NARC, 1999)
This benchmark survey involved a random sample of 54 farmers from the Naldung area, grouped by altitude class, ethnicity, land type, and several farm-level categories to characterize sample variability for production ...
Proceedings of the rice-wheat research end-of-project workshop
(NARC; CIMMYT; Rice-Wheat System Research Consortium, 1998)
This proceedings synthesizes results of six years of research by scientists of the Nepal Agricultural Research Council (NARC) at sites in the lowlands and mid-hills where the rice-wheat cropping system is important. The ...