140results about How to "Accelerated decay" patented technology

The present invention provides wood preservative and flame retardant compositions having low leachability comprising micronized boron compounds and, optionally, one or more organic biocides which may be micronized. Also provided is a method for applying the composition to wood and wood products comprising impregnating the wood with the composition.

The invention provides an external traditional Chinese medicine preparation for treating chronic wounds, which is prepared from the following raw medicines in parts by weight: 10-20 parts of draconis sanguis, 10-20 parts of chuanxiong rhizome, 10-20 parts of notoginseng, 10-20 parts of fried sanguisorba, 10-20 parts of safflower, 10-20 parts of spatholobus stem, 10-20 parts of giant knotweed, 10-20 parts of oldenlandia, 10-20 parts of red sage root, 10-20 parts of herba patriniae, 10-20 parts of moutan bark, 10-20 parts of myrrh, 10-20 parts of mastic, 10-20 parts of rhubarb, 10-20 parts of natural indigo, 10-20 parts of gromwell, 10-20 parts of catechu, 10-20 parts of borneol, 10-20 parts of phellodendron bark and 10-20 parts of boneset. The external traditional Chinese medicine preparation provided by the invention can promote healing of infectious wounds, increase pus, enhance qualitative viscosity and regenerate granulation to enable the wounds to quickly heal, has an obvious effect on treating wound infection, and can be used for treating partial ulcer, removing necrotic tissue and promoting granulation, accelerating the degeneration process of the necrotic tissue, promoting dilation of capillary vessels, accelerating microcirculation of the capillary vessels and filling the wounds.

The invention discloses an organic mulch on an earth surface of garden trees and an application method thereof and belongs to the technical field of garden planting. The organic mulch on the earth surface of the garden trees is prepared by mixing the following components in percentage by weight: 60-70% of pine bark, 25-30% of pine needle and 5-10% of Trichoderma water dispersible granule. By utilizing the organic mulch, water, fertilizer, gas and heat situations of the garden tree earth can be improved, weeds can be prevented from growing, and the purposes of retaining water and soil and optimizing environment can be achieved.

The invention provides a passion fruit planting method, and belongs to the technical field of agriculture planting. The planting method comprises the steps of cutting seedling-raising, garden selection and land preparation treatment, passion fruit seedling transplanting, shed frame building, shaping and pruning, fertilizer and water management and pest and disease damage controlling. For cutting seedling-raising, a soilless cutting seedling-raising mode is adopted for seedling raising, and a soilless substrate is obtained by fermenting brewer's grain, pig manure, bagasse, coconut shells, potassium fulvic acid, pumpkin vines, humic acid, composite strains, banana stems, polyacrylamide and dried pine needles and then adding inorganic nutrient substances. Accordingly, by strengthening management in the seedling raising stage, the passion fruit seedlings which are high in survival rate, robust in growth and high in disease-resistant capacity are obtained, the planting cost in later period can be lowered, and the overall production cost of passion fruits is lowered.

The invention provides a planting method of selenium-enriched pitaya, and belongs to the technical field of agricultural planting. The planting method comprises the steps of management of cutting seedlings, management of seedlings, soil preparation and fertilization of land for growing field crops and field planting, field management, harvesting of fruits and the like. The field management comprises the following fertilization steps: from the planting stage to the flowering stage, dressing seedling strengthening fertilizer during each germination according to the dressing amount of 1 to 2 kg / plant; after the pitaya blooms and yields fruits, carrying out fertilization for three times per year, namely applying pre-blooming fertilizer in April, applying fruit swelling fertilizer in August and applying winter-crossing fertilizer in December, and covering the roots with straws; and loosening the soil once half a year, namely loosening the soil layer, which is 5 to 8 cm in thickness, on the surface layer. According to the method provided by the invention, precise fertilization can be carried out according to the growth characteristic of the pitaya and different nutrition demands in all the stages, so that relatively high yield can be achieved, and the nutritional value of the pitaya is increased, particularly the content of selenium elements.

The invention relates to the field of plastic processing and in particular relates to a multifunctional plastic additive and a preparation method thereof. The multifunctional plastic additive comprises the following components in parts by weight: 70-89 parts of light calcium carbonate powder, 10-15 parts of stearate, 1.0-1.8 parts of mica powder, 3-5 parts of light magnesium oxide powder, 1-2 parts of organic tin, 2-3 parts of glass fiber powder, 1-2 parts of methacrylate, 1.0-1.5 parts of a coupler and 2-4 parts of a lubricant. The preparation method comprises the following steps: pre-modifying the light calcium carbonate powder by stearate, mixing the pre-modified light calcium carbonate powder, the mica powder, the light magnesium oxide powder and the glass fiber powder at a low speed, adding other formulation components, producing a high-temperature and low-speed stirring reaction, and discharging to obtain the multifunctional plastic additive. The preparation process is simple, and the prepared plastic additive can be used for improving the tensile strength, the strength, the pressure resistance and the like of a PVC (polyvinyl chloride) wood plastic composite material and a PVC engineering plastic.

The present invention relates to optical power-limiting device, and more particularly, to an optical power-limiting passive device and to a method for limiting optical power transmission in lenses and windows, using absorption changes in a photochromic material with a fast response, featuring under a millisecond rise time and one to five seconds return / decay time.

The invention relates to the field of vegetable plantation, in particular to a method for planting brassica oleracea L.var .botrytis L..The method for planting brassica oleracea L.var .botrytis L.comprises the following steps of 1, variety selection; 2, seedling culture; 3, soil preparation and soil moisture regulation; 4, fertilizer application; 5, transplanting and field planting; 6, field management; 7, disease and insect pet prevention; 8, leaf binding and flower protection; 9, harvesting conducted in good time.The method is simple and convenient to operate, brassica oleracea L.var .botrytis L.can grow vigorously, resist to diseases and be high in quality and yield, cost can be saved, and synergism, ecological efficiency and environmental protection can be achieved.

The invention provides an efficient machine for crushing, decomposing, burying and returning straws, comprising a frame, a connection rack, a crushing mechanism, a crushed material conveying mechanism, a conveying guide mechanism, a decomposing mechanism and a ditching earthing mechanism; the connection rack is mounted on the frame and is provided with a plurality of mounting holes, and a supporting device is mounted below the frame; the crushing mechanism comprises a mounting shaft and a cutting device, the mounting shaft is rotationally mounted on the frame, the cutting device is mounted on the mounting shaft, the frame is provided with a storage trough, the crushed material conveying mechanism is mounted between the storage trough and the crushing mechanism, and the conveying guide mechanism comprises a first rotary shaft and two spiral vanes; the decomposing mechanism comprises a liquid storage box, a connection pipe and a chemicals spray pipe; the ditching earthing mechanism comprises a plow, a positioning device and two soil-turning discs. The efficient machine is convenient to use, has high straw crushing efficiency and takes short time to decompose straws.

The invention discloses a preparation method of an agricultural organic fertilizer by treating pure straws as a raw material. The preparation method is characterized in that the preparation method comprises the following steps: 1, respectively screening, separating, purifying, rejuvenating and culturing Nocard's bacillus, Bacillus megaterium, Lactobacillus plantarum, thermophilic Bacillus licheniformis and Hypocrea virens, and transferring the above strains to an industrial fermentation tank for fermentation; 2, taking all strain culturing solutions in proportion, mixing, adsorbing with an adsorption carrier, and drying at a temperature of below 28DEG C to a composite inoculant having a water content of below 30%; and 3, inoculating the composite inoculant to a fermentation carrier, spraying water to the water content of 55-65%, and carrying out stacking fermentation at 58-72DEG C for 25-35 days while uniformly overturning once every two days to obtain the pure straw fermented organic fertilizer. The organic fertilizer has the advantages of promotion of the effective recovery and utilization of straws, increase of the diseases prevention capabilities of crops, improvement of the soil structure, and improvement of the product quality.

The invention discloses a saline-alkali paddy straw application method. The method includes the steps that mechanical harvesting is adopted, grass is cut and smashed, and a prepared quick straw rotting agent containing bone meal, raw sugar and the like is sprayed; straw is stacked and preprocessed, wherein the straw is stacked, compacted and subjected to heat preservation and moisture retention; the stacked and preprocessed straw is scattered in winter and turned over to enter paddies. According to the saline-alkali paddy straw application method, mechanical harvesting is adopted, grass is cut and smashed, the prepared quick straw rotting agent containing bone meal, raw sugar and the like is sprayed, straw is stacked and preprocessed, and the straw is stacked, compacted and subjected to heat preservation and moisture retention, so that decomposing bacteria reproduction is convenient, and the straw can be decomposed more quickly; then the stacked and preprocessed straw is scattered in winter and turned over to enter paddies, rotting is promoted, saline-alkali paddy rice planting is improved, and soil fertility is improved. Thus, the situations that the straw decomposition degree is low and rice root system growth is affected are avoided. Meanwhile, the straw utility rate is increased, the organic matter content of saline-alkali soil is increased, and saline-alkali soil is fertilized.

The invention discloses a corn straw total crop straw return protective farming method. A corn harvester with the straw crushing and returning function is adopted for harvesting during the autumn harvest in first year, meanwhile, the crushed corn straws are uniformly thrown into the field, and the ground surface is covered; ploughing and soil preparation operation is carried out; stubble ploughing, straw cutting and mix burying, subsoiling, soil preparation, compacting and the like are completed at one time; in the spring period in the second year, direct seeding is carried out, multiple worksuch as fertilization, precision seeding, soil covering, compacting and the like can be completed at one time; a nitrogen fertilizer is applied between the seedlings by a topdressing machine during the growth period of the corns. According to the method, the straw cutting segments are uniformly mixed in the soil of the tilling layer, so that the ground temperature can be improved, the straw rotting is accelerated, the diseases and pests are reduced, and meanwhile a certain surface straw coverage rate can be guaranteed, wind erosion and water erosion are reduced, and the purpose of protecting the soil is achieved, the method is especially suitable for being applied and popularized in regions with low winter and spring temperature in the northeast, and a technical support is provided for large-area popularization and protection of the regions.

The invention relates to the technical field of spherical vegetable and fruit transportation, in particular to a spherical vegetable and fruit anti-extrusion packaging box. The packaging box solves the technical problem that extrusion and collision between spherical vegetables and fruits cannot be prevented. In order to solve the above technical problem, the spherical vegetable and fruit anti-extrusion packaging box comprises a damping box and an inner box, the bottom of the inner wall of the damping box is fixedly connected with a main airbag, a main memory sponge cavity adheres to the innerwall of the main airbag, a main memory sponge adheres to the interior of the main memory sponge cavity, main air inlet pipes are fixedly inserted into the two sides of the main memory sponge, main valve plates are installed on the inner walls of the main air inlet pipes, and main springs are fixedly connected with the sides, close to the damping box, of the main valve plates. The other side of each main spring is fixedly connected with the top of the inner wall of the corresponding main air inlet pipe through a fixing block, and the two sides of the bottom of the inner wall of the inner box are fixedly connected with anti-extrusion air bags. Inner box air suction pipes fixedly penetrate through the bottoms of the anti-extrusion air bags, and the inner walls of the inner box air suction pipes are provided with inner valve plates.

The invention discloses a method for accelerating rotting of moso bamboo roots, which includes: firstly, using steel bars 2cm-3cm in thickness to break through bamboo joints in bamboo roots of newly felled bamboo; secondly, applying calcium phosphate and salt into broken-through bamboo segments in April to June with adequate rainfall, and earthing the bamboo roots. The method is low in cost and applicable to production, and application of the method promotes rotting of the bamboo roots, increases moso bamboo yield, improves operating environment of moso bamboo stands in Fujian province, changes the traditional mono bamboo management way, lowers moso bamboo management cost, and increases level of managing the moso bamboo stands.

The invention provides a device and method for producing tobacco sheets. The production method of the tobacco sheets includes: tobacco raw materials are extracted in an extraction tank to be separated, insoluble substances are pulped and placed on a screen to be made into sheet bases, and obtained extract liquor is filtered through a filter screen and concentrated to obtain coating liquid; a part of coating liquid is foamed by using a foam generator to obtain foam coating liquid, the foam coating liquid is coated on the sheet bases by using a foam spraying process, and the other part of coating liquid is used for coating the sheet bases sprayed by foams again by using a mist spraying process to obtain wet sheet bases coated twice; sound wave or ultrasonic wave processing is performed on the wet sheet bases coated twice, vibration defoaming is performed on small foams to accelerate seepage of the coating liquid, and the coating liquid coated on the surfaces of the wet sheet bases is prevented from transferring to a nylon mesh belt; and the processed wet sheet bases are dried, and finished products of the tobacco sheets are manufactured after slitting of the sheet bases. The tobacco sheets manufactured by the method are large in coating quantity, high in coating evenness and good in air permeability.

The invention discloses a corn stalk smashing machine and a method for smashing stalks through the same. Spraying heads are used for spraying liquid into a smashing cavity at a material inlet and a material outlet so as to increase the humidity and viscosity of the materials in the smashing cavity and reduce raised dust. Farmyard manure immersion liquid is fully utilized, the material is environmentally friendly, the fertilizer efficiency of the corn stalks can be improved, and decomposition and decaying of the corn stalks can be accelerated. A cutting piece is arranged to be of a double-stick structure formed by hinging first sticks to second sticks, and the second sticks beat the side faces of the materials while the first sticks beat the front faces of the materials, so that the beating multi-dimensionality of the cutting piece is improved, and the smashing effect is improved. Meanwhile, the first sticks are provided with multiple edges which form sharp blades for cutting fiber, so that twining of the fiber is reduced; the second sticks are arranged to be cylinders or prisms for beating the stalks, so that cutting and beating are simultaneously performed, and efficiency is improved.

The invention relates to a cuttage propagation method for bald cypress. By the cuttage propagation method, time of natural propagation of bald cypress is shortened greatly, almost all seedlings grow roots in 50 days after cuttage, and the seedlings are available for transplanting after 120 days. Soil is sterilized before cuttage, so that soil transmission of wilt pathogens is prevented effectively, the survival rate of the seedlings can reach more than 95%, and seedling formation only takes about 4 months. Therefore, planting scale can be quickly expanded in a short time, branches and leaves of small seedlings planted for 4-5 years can be harvested, and branches and leaves of large seedlings planted for 3 years can be harvested.

The invention discloses a method for interplanting bamboo fungi in the imitating wild condition in a dendrocalamus latiflorus forest. The method includes the following steps: site selection, culturing material preparation and processing, planting, management, pest and disease damage control, harvesting and the like. No chemical pesticide is used in the planting process, and the planted bamboo fungi are good in condition, safe and free of pollution. The method is simple in process and easy to implement, raw materials are obtained from local sources, the planting cost is saved, high yield can be obtained, the yield per mu of the bamboo fungi can reach 30 kg or above, rotting of old roos is accelerated, and a space is left for the growth of the bamboo fungi; humus and other organic matters which are formed after the adopted substrate rots can enhance the soil fertility, improve the soil structure, promote the bamboo fungi to well grow and develop, and improve the yield of bamboo shoots, and double benefits are obtained.

The invention discloses a method for removing culm stump in a dendrocalamus latiflorus garden. The method comprises the steps that culm stump emerging branches are cut down; the culm stump is damaged; the culm stump is burnt to death; bamboo fungus bacteria are utilized for digesting the withered culm stump. The process is simple, and implementation is easy; by means of implementation of the method, rotting of the culm stump can be accelerated, manpower and material resource investment of bamboo shoot farmers for removing the culm stump is reduced, the operating cost is reduced, bamboo garden waste can be fully utilized, the culm stump is decomposed through the bamboo fungus bacteria and is converted into bamboo fungi, land fertility can be enhanced through the waste, the soil property structure can be improved, growth and development of forests can be promoted, the yield of bamboo shoots can be increased, and the income of the bamboo shoot farmers can be increased.

The invention discloses a method for reconstructing an Australia nut forest by a eucalyptus forest. According to the method, eucalyptus stumps are drilled, paraquat is sprayed after the eucalyptus stumps grow out new branches and leaves, chlorenchyma of the new branches and leaves rapidly absorb the paraquat, the new branches and leaves are died, hexazinone is sprayed onto the eucalyptus stumps, metabolic disorders of the eucalyptus stumps are achieved, the eucalyptus stumps can be killed under double actions of the paraquat and the hexazinone, urea and slat serve as rot agents, the concentration of the urea and the slat of the eucalyptus stumps and eucalyptus root systems is excessive, a protein structure is broken, the eucalyptus stumps and the eucalyptus root systems are further burnt under the conditions of high salt and ammonia and strong base, the eucalyptus stumps are poisoned, rotting of the eucalyptus stumps and the eucalyptus root systems is accelerated, a corrosion promotingagent is added, protein synthesis of the eucalyptus stumps is further interfered, rotting of the eucalyptus stumps and the eucalyptus root systems is promoted, compound fertilizers and leaf fertilizers are reasonably applied onto the planted Australia nut forest, and premature senescence of Australia nut trees can be effectively avoided.

The invention discloses a fruit transportation and preservation tank with a heating function. The fruit transportation and preservation tank with the heating function comprises a tank body and a tankcover, wherein heat preservation cotton is arranged on an inner wall of the tank body; first screw spikes are arranged at two ends of the heat preservation cotton; the heat preservation cotton is fixed onto the tank body through the first screw spikes at two ends; a heating resistance wire is embedded into the heat preservation cotton; a switch is arranged on the front surface of the tank body; anair vent hole is formed in one side of the tank body; an air cushion is arranged in the tank body; an adsorption box is arranged on the fruit transportation and preservation tank; an ethylene absorbent is filled in the adsorption box and can be used for absorbing partial ethylene in the fruit transportation and preservation tank, so that the ethylene with continuously increasing concentration isprevented from accelerating ripening and rotting of fruits; and the air cushion is arranged on the fruit transportation and preservation tank, a user can inflate the air cushion through an air inlet pipe, so that fruits in the fruit transportation and preservation tank can be fixed through the air cushion, and the air cushion can protect the fruits when the fruit transportation and preservation tank encounters the turbulence.

The invention belongs to the technical field of microbial fermentation and discloses a multifunctional enzyme liquid and a preparation method thereof. The multifunctional enzyme liquid comprises the following steps: preparing a medicinal herb fermentation liquid from radix sophorae flavescentis, pokeberry root or rice chaff, and sugar according to a mass ratio; cultivating the medicinal herb fermentation liquid and a culture solution at the mass ratio to obtain a medicinal herb fermentation liquid culture solution; cultivating bacillus and the culture solution at the mass ratio to obtain a bacillus culture solution; adding the fermentation liquid culture solution, the bacillus culture solution, and microelement salt into a matching groove according to parts by weight, evenly mixing, concentrating to obtain a concentrated solution; homogenizing and fermenting the concentrated solution to obtain the multifunctional enzyme liquid. The enzyme liquid accelerates the decaying of a plant straw through the microbial activities in the soil, the contents of organic matters and nutrients in the soil are further increased, the physical and chemical properties of the soil and the soil microflora are improved, the soil activity and the plant nutrient are improved, the degradation of the nutrients in the soil is accelerated, the microbial metabolites like vitamin, amino acid and phytohormoneare increased, so that the soil is activated, and the fertility of the soil is improved.

The invention provides a method for wholly and directly returning corn straw into field. The method comprises the following steps: (1) collecting straw after corns are harvested and smashing the straw; (2) digging a cellar in harvested corn field; (3) putting the straw treated in the step (1) into the cellar and adding a biological agent to ferment under normal temperature to obtain a fermented product; (4) adding livestock excrement and plant ash according a weight ratio of the fermented product to the livestock excrement to the plant ash as 10 to 3 to 1, evenly mixing, covering with standby soil and fermenting for 10d to obtain a straw fermented organic fertilizer which is used for being returned to field. The method disclosed by the invention effectively solves the problems of tight crop rotation caused by wholly and directly returning the straw to field between double cropping, difficulty in cuttage sowing of next-stubble crops, nitrogen battle between seedlings and straw decomposition, yellowing, seedling weakness and the like; the straw can be returned to field directly; the method can be widely applied to returning crop straw to field.

The invention provides a gardening cultivation method of passion fruits, which belongs to the technical field of agricultural planting. The cultivation method comprises the following steps: selectingmature passion fruits with no disease or pest as seeds; transplanting seedlings after germination and seedling of the seeds; putting up a passion fruit climbing frame on a road before transplantation,excavating a planting pit; putting a homemade base fertilizer into the planting pit, wherein the homemade base fertilizer is formed by fermenting passion fruit vines, watermelon vines, tomato seedlings, banana stalks, humus soil, furfural residues, human wastes, chicken manure, a decomposition catalyst and a plant extractant; applying the fertilizer and trimming after transplantation, so as to complete gardening cultivation of the passion fruits. According to the gardening cultivation method provided by the invention, the survival rate and the yield of the passion fruits are improved, the cost is reduced, and the diseases are prevented; in addition, a comfortable corridor environment is provided by cultivating the passion fruits along the road; therefore, the method is applicable to large-scale systematic cultivation promotion, and a scenery line can be provided for an agricultural planting base.

The invention relates to a composite microbial agent for the rot decomposition of straw and an application method thereof. The composite microbial agent for the rot decomposition of the straw is prepared from, by the number of effective viable bacteria, 3-30 parts of bacillus subtilis, 50-99 parts of bacillus amyloliquefaciens, 1-5 parts of trichoderma asperellum and 1-15 parts of trichoderma longibrachiatum Rifai. The application method of the composite microbial agent for the rot decomposition of the straw comprises the following steps of (1) harvesting and pulverizing the straw; (2) scattering and flat spreading the straw; (3) turning up the soil / conducting rotary tillage; (4) conducting irrigation and soaking; (5) dissolving and spraying the microbial agent; (6) 14-30 days after treatment, completing the rot decomposition of the straw. The composite microbial agent for the rot decomposition of the straw and the application method thereof have the following advantages that the rotof the straw is accelerated; the content of organic matter in the soil is increased; the pollution and fermentation barriers are reduced; the cost is reduced.

The invention relates to a high-purity tellurium dioxide single crystal and a preparation method, which belong to the technical field of the growth of single crystals. The preparation process comprises the following steps of: firstly, growing the single crystal for the first time, then re-dissolving the obtained single crystal, afterwards adding a precipitator for milling, and finally, obtaining the high-purity single crystal after growing the single crystal for the second time at the prepared powder. The purity of the tellurium dioxide single crystal prepared by the invention is high, and especially, the content of the radioactive impurities of U, Th and the like can be lowered to 10 to 13g / g.

The invention discloses a greening garbage recycle processing device for gardens. The greening garbage recycle processing device for the gardens includes a shell body, wheel shaft mounting holes are respectively formed in the top and the bottom of one side of the shell body, the inner walls of the two wheel shaft mounting holes are respectively connected with wheel shafts through bearings, outer walls of one sides of the two wheel shafts are respectively connected with belt pulleys through keys, a conveyor belt sleeves the outside walls of one sides of the two belt pulleys, shovel plates distributed evenly at equal intervals are welded to the outside wall of the conveyor belt, filtering holes are formed in the outside walls of the shovel plates, transmission shaft mounting holes are respectively formed in the two sides of the outer wall of the shell body, and the inner walls of the two transmission shaft mounting holes are respectively connected with transmission shafts through bearings. According to the greening garbage recycle processing device for the gardens, regrinding is conducted on crushed aggregates, the smashing effect of the garbage can be improved, complete smashing ofthe garbage is guaranteed, the garbage can be fully extruded, the space taken by garbage can be reduced, decomposition and decay of tree leaves and tree branches can be accelerated, and thus nutrientelements of the tree leaves and the tree branches can flow into the ground.

The invention provides a firm type fruit and vegetable sterilizing and freshness preserving frame. The firm type fruit and vegetable sterilizing and freshness preserving frame comprises a storage frame body with an semi-open inner cavity, the inner cavity is internally provided with one or more basin bodies for containing fruits and vegetables, the basins are internally provided with a plurality of drive wheels, the drive wheels are provided with drive devices capable of driving the drive wheels to rotate and thus driving the fruits and vegetables in the basin bodies to rotate, the drive devices are connected with drive controllers through signal lines, and the storage frame body is provided with an ultrasonic atomizer capable of conveying water vapor into the inner cavity. The firm type fruit and vegetable sterilizing and freshness preserving frame has a good freshness preservation effect.

The present invention provides a method for producing a biological organic fertilizer from abamectin fermentation waste residue. A main raw material of abamectin fermentation waste residue and auxiliary blending materials of straw and chicken manure are treated with aerobic fermentation; an abamectin residue degradation microbial inoculum is added during the aerobic fermentation process to help accelerating degradation of the abamectin residue, under high temperature, ventilating and aerobic conditions. Field tests show that the biological organic fertilizer prepared by the method provided by the invention can not only substitute a conventional biological organic fertilizer to be used in agricultural production, but also has obvious yield increasing effect, so as to realize harmlessness and resource utilization of the avermectin waste residue compost.