The invention provides a callus induction medium for blueberry tissue culture, taking woody plant medium (WPM) as a basic medium, and including: 0.5-5.0 mg/L forchlorfenuron (CPPU) and 0.1-0.4 mg/L 2-isopentenyladenine (2-ip). The present invention also provides a callus culture method for blueberry, including inoculating the blueberry explant into the above callus induction medium to conduct induction culture in order to form blueberry callus. The present invention also discloses the medium combination and culture method to culture the above blueberry callus to blueberry tissue culture plant. For the above medium and culture method, the differentiation effect is good, efficiency is high, one can conduct continuous differentiation, and the effect is better on multiple varieties.

The invention provides a callus induction medium for blueberry tissue culture, taking woody plant medium (WPM) as a basic medium, and including: 0.5-5.0 mg/L forchlorfenuron (CPPU) and 0.1-0.4 mg/L 2-isopentenyladenine (2-ip). The present invention also provides a callus culture method for blueberry, including inoculating the blueberry explant into the above callus induction medium to conduct induction culture in order to form blueberry callus. The present invention also discloses the medium combination and culture method to culture the above blueberry callus to blueberry tissue culture plant. For the above medium and culture method, the differentiation effect is good, efficiency is high, one can conduct continuous differentiation, and the effect is better on multiple varieties.

A device for illuminating tomato plants in confined spaces without natural light and in greenhouse conditions. The device has a tight housing formed as a radiator, RGB (Red, Green, Blue) Light Emitting Diodes (LEDs) fitted within the tight housing and connected to an electronic power supply system indirectly via a spectroradiometer. The LEDs have adjustable power at least between 160 ?mol/m.sup.2s to 200 ?mol/m.sup.2s. The LEDs are electroluminescent LEDs with a light band that includes violet and blue regions with wavelengths of 400 to 500 nm, red and far red regions with wavelengths of 600 to 800 nm and/or green spectral regions with wavelengths of 500 to 600 nm.

A sulfur plasma lamp has a lamp envelope of transparent or translucent glass or ceramic material. At least two silicon carbide electrodes are hermetically sealed with the lamp envelope and in contact with an interior of the lamp envelope. A quantity of sulfur within the interior of the lamp envelope is sufficient to create a sulfur plasma upon excitation. A buffer gas within the interior of the lamp envelope enables initial discharge and heating of the interior of the lamp envelope to excite the sulfur into a plasma state. More than two electrodes may be provided, and an electrical potential is created between different pairs of the electrodes at different times, thereby inducing stirring of the plasma upon excitation of the material into a plasma state.

Biomass compositions and methods for decreasing bruising of fruit of a fruiting plant by administering to the fruiting plant, seedling, or seed, a liquid composition treatment comprising a culture of microalgae cells are disclosed. The liquid composition may comprise pasteurized Chlorella cells only, Aurantiochytrium acetophilum HS399 cells only, or a combination of Chlorella and Aurantiochytrium acetophilum HS399 cells that are pasteurized at a temperature between 65 C.-90 C. The administration may comprise contacting soil in the immediate vicinity of the fruiting plant, seedling, or seed.

Biomass compositions and methods for increasing sweetness of fruit of a fruiting plant by administering to the fruiting plant, seedling, or seed, a liquid composition treatment comprising a culture of microalgae cells are disclosed. The liquid composition may comprise pasteurized Chlorella cells only, Aurantiochytrium acetophilum HS399 cells only, or a combination of Chlorella and Aurantiochytrium acetophilum HS399 cells that are pasteurized at a temperature between 65 C.-90 C. The administration may comprise contacting soil in the immediate vicinity of the fruiting plant, seedling, or seed.

Biomass compositions and methods for increasing sweetness of fruit of a fruiting plant by administering to the fruiting plant, seedling, or seed, a liquid composition treatment comprising a culture of microalgae cells are disclosed. The liquid composition may comprise pasteurized Chlorella cells only, Aurantiochytrium acetophilum HS399 cells only, or a combination of Chlorella and Aurantiochytrium acetophilum HS399 cells that are pasteurized at a temperature between 65 C.-90 C. The administration may comprise contacting soil in the immediate vicinity of the fruiting plant, seedling, or seed.

A method of sowing watermelon seeds includes seeding triploid watermelon seeds and watermelon pollinizer seeds in separate cells within a seedling tray. The triploid watermelon seeds produce seedless watermelons and the pollinizer seeds produce seeded watermelons. The seeded watermelons are not inherently bred to have reduced competition to plants grown from the triploid watermelon seeds.

A method of sowing watermelon seeds includes seeding triploid watermelon seeds and watermelon pollinizer seeds in separate cells within a seedling tray. The triploid watermelon seeds produce seedless watermelons and the pollinizer seeds produce seeded watermelons. The seeded watermelons are not inherently bred to have reduced competition to plants grown from the triploid watermelon seeds.

The invention relates to a method for producing for producing soluble potassium sulfate by recrystallization of crude potassium sulfate wherein the crude potassium sulfate contains an amount of potassium, calculated as K.sub.2O of about 15 wt % or higher preferably about 40 wt % or higher and has either more than about 0.07 wt % insoluble material, and/or a dissolution speed wherein at 3 min dissolution of 100 gram product in 1 L cold water (20 C.), without stirring the amount of dissolved potassium sulfate of less than about 90% and/or a pH of about 6 or higher as a 1% dissolved crude potassium sulfate, wherein the method comprises the following steps: crude potassium sulfate is dissolved, the dissolved potassium sulfate is subjected to a solid material removal step, potassium sulfate is crystallized, while optionally an acid is provided before, during or after the crystallization step of the potassium sulfate and whereafter the obtained potassium sulfate is separated and dried, wherein the particle size of the crystalline material is controlled to be within the ranges provided, optionally with sieving and/or grinding, preferably by sieving, such that the resulting potassium sulfate crystalline material conforms with the following characteristics: the amount of insoluble material is less than about 0.05 wt %, a 1 wt % solution of the potassium sulfate has a pH below about 6, and/or 1 pH unit lower than the pH of the crude potassium sulfate, the fraction obtained after crystallization has an average particle size within the following parameters: (i) d90<about 0.6 mm, (ii) d10>about 0.02 mm, and (iii) dust amounts to about 0.4 wt % or less, whereby the potassium sulfate contains more than 51% potassium, calculated as K.sub.2O.