An aluminium hydroxide hydrogel for agriculture is provided. The aluminium hydroxide hydrogel includes aluminium polyhydrate and water.

Some aspects of the disclosure relate to composite materials and cultivation systems with particular utility for use in aquaculture, for example cultivating various species of seaweed. The systems comprise at least one highly tortuous and often micro-fibrous material and at least one material having low tortuosity. These systems may be configured in a variety of shapes and associated with a number of different structures. Some of these composite materials and cultivation systems may be used in both direct and indirect seeding of macroalgae plants such as seaweed.

Some aspects of the disclosure relate to composite materials and cultivation systems with particular utility for use in aquaculture, for example cultivating various species of seaweed. The systems comprise at least one highly tortuous and often micro-fibrous material and at least one material having low tortuosity. These systems may be configured in a variety of shapes and associated with a number of different structures. Some of these composite materials and cultivation systems may be used in both direct and indirect seeding of macroalgae plants such as seaweed.

Variable-scale, modular, easily manufacturable, energy efficient, reliable, and computer-operated farming superstructure systems (FSS) may be used to produce Cannabis for human consumption with minimal water and environmental impact. A FSS system may comprise modules including liquid distribution and plant growing. A FSS may be configured to be constructed out of a plurality of containerized modules.

Variable-scale, modular, easily manufacturable, energy efficient, reliable, and computer-operated farming superstructure systems (FSS) may be used to produce Cannabis for human consumption with minimal water and environmental impact. A FSS system may comprise modules including liquid distribution and plant growing. A FSS may be configured to be constructed out of a plurality of containerized modules.

The systems and methods herein are directed to a porous ceramic material coated with nano particles, thereby achieving a filtration and absorption environment for a plant growth medium. The plant growth medium is released in a non-toxic state for consumption by plants residing within the porous ceramic material coated with nano particles. The pores are arranged as to store and subsequently release the plant growth medium in a non-toxic state, which is consumed by the one or more plants. The plants are consuming healthier plant growth medium, and thereby grow to be taller and healthier.

The systems and methods herein are directed to a porous ceramic material coated with nano particles, thereby achieving a filtration and absorption environment for a plant growth medium. The plant growth medium is released in a non-toxic state for consumption by plants residing within the porous ceramic material coated with nano particles. The pores are arranged as to store and subsequently release the plant growth medium in a non-toxic state, which is consumed by the one or more plants. The plants are consuming healthier plant growth medium, and thereby grow to be taller and healthier.

The invention provides preparation of a selenium-water-soluble high-molecular polysaccharide hydrogel and use thereof. The preparation method includes: (1) water solution of polysaccharide and seleno-compound was prepared by heating the mixture with stirring; and (2) the solution was cooled with standing within shaped container to obtain the selenium-polysaccharide composite hydrogel. Plant seeds are sown on the surface of the composite hydrogel and cultivated to obtain selenium-rich plants. Shape-controllable hydrogel could be prepared by recycled hydrogel through high-temperature dissolution followed with cooling to realize the effective utilization of selenium in the hydrogel. Compared with the traditional selenium enrichment method, current method showed advances in prevent of selenium pollution, which normally caused by the application of selenium fertilizers.

The invention provides preparation of a selenium-water-soluble high-molecular polysaccharide hydrogel and use thereof. The preparation method includes: (1) water solution of polysaccharide and seleno-compound was prepared by heating the mixture with stirring; and (2) the solution was cooled with standing within shaped container to obtain the selenium-polysaccharide composite hydrogel. Plant seeds are sown on the surface of the composite hydrogel and cultivated to obtain selenium-rich plants. Shape-controllable hydrogel could be prepared by recycled hydrogel through high-temperature dissolution followed with cooling to realize the effective utilization of selenium in the hydrogel. Compared with the traditional selenium enrichment method, current method showed advances in prevent of selenium pollution, which normally caused by the application of selenium fertilizers.

A floatable island includes at least one layer having a structure containing grains, the grains including an expanded mineral material.