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What Is Improved Rice Seed? A Detailed Guide to Selecting Seed Varieties Adapted to Local Conditions
Improved rice seed has relatively stable, specific heredity, as well as relative biological, economic and morphological uniformity. In a specific region, under specific cultivation conditions and within a specific period, it meets production needs in terms of yield, maturity period, quality and adaptability. Besides possessing the basic qualifications of a variety, improved rice seed must also have advantages such as high and stable yield, excellent grain quality, disease resistance, insect resistance and strong stress resistance. A good rice seed should include 3 aspects: first, it must have high yield, high quality,
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What are the key technical points for selecting sunflower seeds in the field?
I. Selection of the plot, determination of sowing date, sowing rate and density: When planting sunflowers, never practice continuous cropping or intercropping in adjacent strips; the same plot must be left at least 3 years apart. Continuous cropping leads to the occurrence of pests and diseases and an imbalance in soil nutrients, causing severe yield reduction. Soil salt content should not exceed 4500 plants/667 sq m, and follow the rule "sparse planting on fertile land, ...
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