Addition of boiler charcoal waste to compost for use as substrate for vegetable seedlings 757 Engenharia Agrícola, Jaboticabal, v.39, n.6, p.753-762, nov./dec. 2019 humification of substrate

Mineral oil is another traditional wood sealer. Although mineral oil is petroleum-based, it is considered food-safe and often used to season wood on salad bowls and butcher blocks. For an effective, homemade eco-safe preservative, melt beeswax over a double boiler, then add approximately the same volume of mineral oil and mix well.

Mini onions can be harvested at two sizes: marble- to golf-ball-size for pearl onions, or slightly larger for bunching onions. For pearl onions, use a higher seeding density and do not thin the seedlings. For bunching onions, thin the plants to a lower density. Choose either the familiar white mini onion or a colorful, red-skinned variety.

Fig ur e 2: Schematic of baby boiler and cooker for cashew nut seed steaming. Ta b l e 2: Pr o ximate analysis of fuel for steaming . Sr . no. T y pe of fuel Moistur e content (%) V olatile matter

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