In this section we try to answer the questions submitted by readers. Doubts about any themes conveyed by SEEDnews or even other pertinent to agriculture, can be forwarded to

    I know that there is a relationship between the volume of seed and its weight. In this sense, I wonder what is the weight of 20m3 of corn.

    Indeed, there is a close relationship between weight and seed volume. Thus, in the case of  corn in bulk, 20m3 weighs around 15t. On the other hand, if the corn is on the cob, the weight will be 9.0t. There is a large space between the ears, making the volumetric weight smaller when compared with the seed in bulk.

    I find it difficult to understand why I have to pay any value for those who created and developed a variety, even when I use my own grain of soybean as seed. This because  I already paid the technology fee for the patent of RR2Bt soybeans. Could you comment?

    This basically involves two aspects: the first is easy, because, in addition to the patent law (industrial), there is also  the plant variety protection law, according to which, for a seed to be used it must have a license from who created the cultivar; and the second, perhaps most importantly, is that with the money raised from the contribution of those who used the seed (as seed or grain) of a protected variety, the breeder can continue to invest in creating more and better cultivars. What is patented, in the case of soybeans, are biotechnological processes involving events, while protection refers to germplasm. Two different things.

    I bought a lot of seeds with at a minimum of 80% germination, as stated on the package label; what is the meaning of this information, because this is not enough for us to adjust the seeding rate?

    This minimum standard is established by marketing standards to protect the farmer, however the actual germination of the seed lot is checked in seed analysis report or the compliance term accompanying to the seed lot. In general, the seeds are put up for sale with much higher germination than the minimum standard. Fortunately for the farmer.

    In corn seed, I note that some seeds are flat and others tend to be round. What is the reason for this, are hybrids or varieties?

    In the process of corn seed formation in a well-formed ear, with 300 to 600 seeds, we find flat seeds around the ear center where the seeds are pressed to each other, while at the ends of the ear with small pressure between them, we find rounded seeds. Flat and rounded seeds have the same genetic make-up.

    I have observed that there are several products indicated for seed treatment. What is the function of each one?

    Indeed, the process of seed treatment may involve several products. Some are for protecting the seeds (insecticides, fungicides, nematicides), others to increase their performance, such as physiological and nutritional products and coatings to cover the syrup  on the seed. This minimizes the problem of powder. These products came to help the seed to  perform its function.



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