Sentence examples for improved varieties over from inspiring English sources
Yield advantages of improved varieties over that of locally cultivated maize landraces could be attributed to superior RSA and rhizosheath traits of the improved maize varieties.
Rice breeding is a continual process and all varieties are expected to be replaced by improved varieties over time.
Farmers that had planted at least one improved variety over the last one year were classified as adopters and those that have engaged in the cultivation of traditional cassava varieties or have adopted briefly and discontinued adoption as at the time of the survey were classified as non-adopters.
In some ways, landraces may have an advantage over improved varieties since they tend to have relatively high levels of genetic variation (Tang and Knapp 2003; Reif et al. 2004; Yamasaki et al. 2005; Warburton et al. 2008), which could be a source of adaptive variation (Altieri and Koohafkan 2008).
In Ethiopia, more than 40 improved varieties of maize have been developed and released over the last four decades (Zeng et al. 2015).
However, a majority of the DPRK rice accessions in this study represented improved varieties developed over the last 60 years, which were genetically very narrow in both genomes.
Five maize landraces and thirteen improved varieties (eleven open-pollinated varieties and two hybrids, released in Ghana over the period 1984 2012) were used.
Ninety-six of these varieties are traditional varieties and 94 are improved varieties (Additional file 1: Table S1).
Not only traditional varieties are sourced through such informal channels, but also farmer recycled improved varieties.
Classes and skills improve variety, but not until they're introduced around the 20-hour mark.
