Improved varieties of seed are estimated to have boosted yields by 21-43%, independently of fertilisers and other inputs.
The Green Revolution — a series of agricultural innovations producing improved varieties of wheat that could respond better to irrigation and benefit from fertilizer — provided that opportunity.
It is one of several new initiatives to develop improved varieties of crops that have been grown by small-scale farmers for generations but long-overlooked by international researchers and industry focused on globally traded staples like wheat and maize.
In Ethiopia, more than 40 improved varieties of maize have been developed and released over the last four decades (Zeng et al. 2015).
It is concluded that, at the juvenile stage, landraces and improved varieties of maize have significantly different rhizosheath and RSA characteristics.
Improved varieties of millet obtained were conditioned to different moisture contents (10, 20 and 30%) and their physical properties were determined.
This implies that the pigeonpea adoption rate in Malawi could have been 41%% in 2007 if the whole population had been exposed to improved varieties of pigeonpea, instead of the joint exposure and adoption rate of 14%%.
New or improved varieties of floricultural crops can be obtained by acting on floral traits, such as color, shape or fragrance, on vase life in cut-flower species, and on rooting potential or overall plant morphology.
We compared DPRK temperate japonica varieties (improved varieties of Group 1) with other temperate japonica varieties evaluated in a previous cold tolerance study in Chunchoen Substation, which used the same phenotypic methodology under the same conditions for both control and cold-treated sample (Suh et al. [2013]; Jeong et al. [2000]).
Researchers have developed improved varieties of amaranth, African eggplant, African nightshade, and cowpea that are now widely available in many parts of Africa.
