"improved varieties" is a correct and usable phrase in written English.
You can use it when referring to a new or better version of something, as in "Farmers are now able to cultivate improved varieties of wheat."
We will need improved varieties with improved traits targeting the consumer, while still satisfying the needs of the industry.
Figure 4 shows that traditional varieties, selected by ancient farmers, are not of significantly different GI than improved varieties, with the average GI of improved varieties being 64.9 and of traditional, 64.0.
included improved varieties from South-East Asia; J3 included a small set (5 acc). of improved varieties derived from Colombia 1; J4 (8 acc).
Improved varieties include "Altifolius," somewhat taller, and "Potter's Wheel," with broader sepals.
Some have had a 66percentt gain in calcium-rich finger millet yields through improved varieties and better soil health.
Improved varieties of seed are estimated to have boosted yields by 21-43%, independently of fertilisers and other inputs.
As companies and universities patent improved varieties, developing countries, which harbor many wild seeds useful in breeding, are growing reluctant to share these seeds without compensation.
These collections preserve rare and endangered plants and their unique characteristics, so that scientists can study them and breeders can use them to develop improved varieties.
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.
Both growers and consumers ask continuously for new, improved varieties.
