Provided is a compound and composition capable of increasing a sugar content in a fruit by a simple method, without being restricted by a cultivation area of a plant or a climatic environment. The agent for increasing a sugar content in a fruit of a plant comprises a compound represented by the formula MX as an active ingredient, wherein M represents alkali metal ion or alkaline earth metal ion, and X represents carbonate ion, hydrogen carbonate ion, acetate ion, citrate ion, succinate ion, phosphate ion, hydrogen phosphate ion, or pyrophosphate ion.

Provided is a compound and composition capable of increasing a sugar content in a fruit by a simple method, without being restricted by a cultivation area of a plant or a climatic environment. The agent for increasing a sugar content in a fruit of a plant comprises a compound represented by the formula MX as an active ingredient, wherein M represents alkali metal ion or alkaline earth metal ion, and X represents carbonate ion, hydrogen carbonate ion, acetate ion, citrate ion, succinate ion, phosphate ion, hydrogen phosphate ion, or pyrophosphate ion.

Disclosed are a method and a system for forecasting a tree disease using moisture information. The method is carried out by a server. The method includes receiving, by the server, moisture information measured from a tree, wherein the moisture information includes a plurality of moisture information measured from the tree over time, and performing, by the server, time-series analysis of the plurality of moisture information, wherein the server performs time-series analysis of moisture information of the tree as measured over a predetermined period of time, and determines that the larger a number of inflection points of a curve corresponding to the moisture information, the higher a probability at which the tree has been infected with the tree disease.

Disclosed are a method and a system for forecasting a tree disease using moisture information. The method is carried out by a server. The method includes receiving, by the server, moisture information measured from a tree, wherein the moisture information includes a plurality of moisture information measured from the tree over time, and performing, by the server, time-series analysis of the plurality of moisture information, wherein the server performs time-series analysis of moisture information of the tree as measured over a predetermined period of time, and determines that the larger a number of inflection points of a curve corresponding to the moisture information, the higher a probability at which the tree has been infected with the tree disease.

In a solution cultivation method for a low potassium vegetable, an entire cultivation period from seeding to harvesting is divided into a first cultivation period and a second cultivation period depending on the vegetable to be cultivated. In the first cultivation period, the vegetable is cultivated in a first culture solution containing a first fertilizer for solution cultivation which contains potassium. In the second cultivation period, the vegetable is cultivated in a second culture solution containing a second fertilizer for solution cultivation which does not substantially contain potassium. During the second cultivation period, an air flow is applied at a controlled speed to the growing point of the vegetable.

In a solution cultivation method for a low potassium vegetable, an entire cultivation period from seeding to harvesting is divided into a first cultivation period and a second cultivation period depending on the vegetable to be cultivated. In the first cultivation period, the vegetable is cultivated in a first culture solution containing a first fertilizer for solution cultivation which contains potassium. In the second cultivation period, the vegetable is cultivated in a second culture solution containing a second fertilizer for solution cultivation which does not substantially contain potassium. During the second cultivation period, an air flow is applied at a controlled speed to the growing point of the vegetable.

A method of cultivating plant in transparent sealed container and base used therefor, wherein the base is mainly obtained by solidifying a mixture formed by adding gellan gum to transparent nutritional liquid; the gellan gum being added to the nutritional liquid is in an amount of 2-10 g/L; the base has a PH value of 3.5-10.0. The use of gellan gum as the sole transparent solidifying agent ensures the gellan gum, the base of the present invention is capable of adhering securely in the transparent sealed container. As shown by experiments, the base of the present invention will not slide or disperse in the transparent sealed container under normal shaking state, and can remain adhered to the transparent sealed container for 3-10 minutes when the transparent sealed container is turned upside down.

A method of cultivating plant in transparent sealed container and base used therefor, wherein the base is mainly obtained by solidifying a mixture formed by adding gellan gum to transparent nutritional liquid; the gellan gum being added to the nutritional liquid is in an amount of 2-10 g/L; the base has a PH value of 3.5-10.0. The use of gellan gum as the sole transparent solidifying agent ensures the gellan gum, the base of the present invention is capable of adhering securely in the transparent sealed container. As shown by experiments, the base of the present invention will not slide or disperse in the transparent sealed container under normal shaking state, and can remain adhered to the transparent sealed container for 3-10 minutes when the transparent sealed container is turned upside down.

Described are methods of field conditioning cereal crop pollen. A method of the present invention includes collecting fresh pollen and introducing the pollen to field conditioning conditions which regulate pollen moisture content. The field conditioning conditions may include a relative humidity ranging from about 50% to about 100%, a temperature ranging from about 10-10 C., and an air pressure ranging from about 15 kPa to about 150 kPa. The field conditioning conditions may further include a continuous, adjustable positive or negative air flow and/or and a flow of one or more continuously refreshed, selected gases. The field conditioning conditions may dehydrate the pollen to achieve a pollen moisture content of about 40% to about 58%, such as about 50% to about 57%.

Described are methods of field conditioning cereal crop pollen. A method of the present invention includes collecting fresh pollen and introducing the pollen to field conditioning conditions which regulate pollen moisture content. The field conditioning conditions may include a relative humidity ranging from about 50% to about 100%, a temperature ranging from about 10-10 C., and an air pressure ranging from about 15 kPa to about 150 kPa. The field conditioning conditions may further include a continuous, adjustable positive or negative air flow and/or and a flow of one or more continuously refreshed, selected gases. The field conditioning conditions may dehydrate the pollen to achieve a pollen moisture content of about 40% to about 58%, such as about 50% to about 57%.